NASA Challenge: An Advanced Lightweight Lunar gantry for Operations (ALLGO)

99 comments

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  Ikponmwosa Obasogie over 3 years ago

  @kesa Sorry, but the labeling on diagrams below are not visible

  Ikponmwosa Obasogie has uploaded 3 CAD models & has left 10 comments.
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  Ikponmwosa Obasogie over 3 years ago

  And the first link doesn't work

  Ikponmwosa Obasogie has uploaded 3 CAD models & has left 10 comments.
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  Ikponmwosa Obasogie over 3 years ago

  What should be the max/minimum height of the gantary?

  Ikponmwosa Obasogie has uploaded 3 CAD models & has left 10 comments.
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  Kesa over 3 years ago

  First link is fixed

  Kesa has uploaded 3 CAD models & has left 211 comments.
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  Ikponmwosa Obasogie over 3 years ago

  Thanks @kesa

  Ikponmwosa Obasogie has uploaded 3 CAD models & has left 10 comments.
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  Kevin Kempton over 3 years ago

  For the minimum heights, consider the human scale landing system designs at the first link. Make some assumptions since these designs are subject to changes as they mature. Providing assumptions early on is a good way to get feedback so you can refine your solution.
  It may be impractical to deploy a lunar gantry system that could offload items from the top of a starship type lander (but they seem to provide a platform to lower payloads to the surface). It may be something to consider a system that can get close enough to pick up payloads that have been lowered down next to the vehicle since the concept provided would not be able to do that.
  I don't think there is anything that would impose a maximum height limit.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kamen Rusev over 3 years ago

  This will be tough. In my opinion proposing new concept ideas should be enough. Different approach with schematics and simple CAD introduction. Good luck to every one!

  Kamen Rusev has uploaded 56 CAD models & has left 267 comments.
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  Ashish Karanam over 3 years ago

  yes thats very very difficult
  All the best guys and prize money is low too

  Ashish Karanam has uploaded 0 CAD models & has left 3 comments.
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  Vaclav Lhota over 3 years ago

  Don't cry lads and get to work!

  Vaclav Lhota has uploaded 3 CAD models & has left 57 comments.
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  Kenneth Keiser over 3 years ago

  Wow! I would love to try this one out... not sure if I would have enough time though.

  Kenneth Keiser has uploaded 13 CAD models & has left 16 comments.
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  Chunduru Amareswara Prasad over 3 years ago

  Is there a maximum weight limit that the crane can lift? And also is there a weight limit of the crane itself?

  Chunduru Amareswara Prasad has uploaded 0 CAD models & has left 1 comments.
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  Sergi Bada over 3 years ago

  hey guys, how are you going to approach the structural analysis? Any ideas how to characterize inflatable structures?

  Sergi Bada has uploaded 3 CAD models & has left 38 comments.
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  Paulo Mueller over 3 years ago

  algo a ser pensado....talvez durante um sonho.

  Paulo Mueller has uploaded 0 CAD models & has left 2 comments.
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  Bryan Cierniak over 3 years ago

  Im currently working on a design but have never worked with any type of inflatable you want to use. my weights and sizes may be significantly off. Though since this is a design concept...

  Bryan Cierniak has uploaded 64 CAD models & has left 24 comments.
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  Ricardo over 3 years ago

  Let´s game on

  Ricardo has uploaded 16 CAD models & has left 1 comments.
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  vignesh kumar M over 3 years ago

  can someone say what is the stiffness and strength of inflatable tubes?

  vignesh kumar M has uploaded 7 CAD models & has left 2 comments.
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  Jouni Huopana over 3 years ago

  The links provide some numbers, check the researchgate paper.

  Jouni Huopana has uploaded 3 CAD models & has left 41 comments.
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  Roberto Oliveira over 3 years ago

  We are working hard 18/24 hours and soon we will post our prototype. Surprises will come very soon !

  Roberto Oliveira has uploaded 0 CAD models & has left 1 comments.
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  Kevin Kempton over 3 years ago

  Wow, I am seeing some great ideas in the submissions. Keep them coming!
  Remember this specific challenge is focused on using inflatable components for the much of the structure since they have the potential to be the most mass efficient and getting mass to the lunar surface is very, very expensive. They can also have a very high packaging efficiency which is important for fitting it inside a rocket fairing and on top of a lunar lander.
  As a special heads up to the GrabCAD community: There will be a closely related NASA challenge coming out in early November on a different crowdsourcing platform so keep your eyes open. I can’t say a lot more at this time but the work you are doing for the ALLGO challenge could be applicable.
  I will be looking for ALLGO configurations that we can put in a proposal for funding that will allow us to prototype an inflatable structure next year so we can do some testing.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  javad kazemi over 3 years ago

  Hello to all well-thought-out friends and designers without ideas.
  Thanks to NASA for trusting the designs and ideas of borderless engineers and designers from around the world.
  Certainly, this approach will create the foundations for friendship, peace and the spirit of interaction in creating useful technologies for the whole world, humanity and the future.
  I am very happy to have found many artist and well-thought-out friends all over the world due to the challenges of this great group, and this group is like a great and useful university in various sciences of engineering and design.
  Congratulations to all the organizers of these challenges, as well as more congratulations to the thoughtful, smart and inventive designers.
  **Greetings and good luck to the Challenge Jury.**
  Given the difference between gravity on the surface of the moon and gravity on the surface of the earth, I have a few key questions to make a good suggestion:
  1- Is the maximum load that this equipment has to move a few kilograms per month?
  2- Should this equipment lift the load and move with the load? Or is it fixed in one place first and then lifts the load?
  3- Considering the existence of a vacuum on the surface of the moon, what is the maximum pressure of air or gas that can be blown in the wind system?
  4- Can we use resistant polymers in the design and consider the retractable system as telescopic and sliding?
  5- How many watts or how many kilowatts should the winch and load motor of the equipment be equipped with?
  6- If we want to have light and efficient equipment and be able to do the desired work, the factor of time to do a job and move is very decisive, how important is the speed of equipment performance?
  Thanks

  javad kazemi has uploaded 23 CAD models & has left 38 comments.
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  Germano Pecoraro Designer over 3 years ago

  Hey Guy,
  it is really difficult to download all the PDF files from the various links, some just don't open.
  Wouldn't it have been easier to make a single compressed folder with all this material !?
  Thanks

  Germano Pecoraro Designer has uploaded 35 CAD models & has left 62 comments.
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  Kevin Syc over 3 years ago

  Hi there, I am excited about the challenge and I just wanted to ask whether packing the whole system from operational mode back into packaged state is something we should be looking at as well? Or is it simply a matter of unpacking the system from packaged state and then it will stay this way indefinitely? Thank you.

  Kevin Syc has uploaded 7 CAD models & has left 24 comments.
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  Jin Ho Kang over 3 years ago

  Thank you so much for your all great idea! We’re looking for an inflatable structure. The system can be depressurized for safety when it is not operational, but doesn’t need to be re-packaged to the original configuration.

  Jin Ho Kang has uploaded 0 CAD models & has left 1 comments.
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  Kevin Kempton over 3 years ago

  Once deployed from the lander, the ALLGO will NOT have to be repackaged.
  However, you may want to consider a system where the gas can be pumped back into the gas bottles and kept at a low pressure when not in use. It would the be re-inflated when needed. This will reduce the long term air leakage from the inflatable structural components when the ALLGO system is not being used.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  Remember that lunar dust is a big challenge since it is electrostatically charged and finds its way onto most surfaces and also sticks to a lot of materials. It is also very abrasive so avoid sliding parts such as telescoping tubes as much as possible since they are hard to protect from the dust.
  The landing zone will be at least several hundred meters and maybe a kilometer or more from the habitation area. This is primarily because the rocket plumes will kick up a lot of debris and accelerate them to high speeds during landing and take-off. Since there is no atmosphere, even small particles including dust will follow a ballistic trajectory without slowing down as they do on Earth. The ALLGO system will have to be moved far enough away and/or shielded so that it is unlikely it will be damaged. This all affects the speed of the system since it is a trade between operational efficiency and higher costs for enhanced mobility.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  javad kazemi over 3 years ago

  Hello Mr. KevinKempton
  Thank you very much for your answer.
  It was a great guide, especially with regard to dust.
  Wishing you success

  javad kazemi has uploaded 23 CAD models & has left 38 comments.
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  Nahuel Costa over 3 years ago

  About the thickness of MMOD layers, what is the difference between those used in the apollo missions (lunar EVA suits), and those used in the transhab?

  Nahuel Costa has uploaded 3 CAD models & has left 9 comments.
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  Nikola Mudrinski over 3 years ago

  With this prizes you can only have concept, sketch ..basicly simple idea (0.1% of what is needed from start to end project).There is lots of variables we dont know and motivation to do all that mega job with comical prizes like this is joke. Wouldn't be surprised if i see red bull challenge "new red bull F1 engine" concept+animation+calc+prototype,dyno etc with prizes similar to this. Its a joke guys, totaly unrealistic. So good luck to all .

  Nikola Mudrinski has uploaded 8 CAD models & has left 23 comments.
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  Vaclav Lhota over 3 years ago

  Nikola, draw something nice, bring some ideas, inspire us around as we are inspiring the others. This is to use everybody's brain and hoping something interesting can pop up. Or maybe not. NASA and others are breaking the limits in this bussines. I would always contribute to this, no matter what the prize money is.

  Vaclav Lhota has uploaded 3 CAD models & has left 57 comments.
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  Kevin Kempton over 3 years ago

  The amount of MMOD protection needed for micro-meteorites is dependent on the level of risk that we want to accept. NASA uses a 5X5 risk matrix (likelihood versus consequence). Likelihood can be calculated by the known particle flux hitting the lunar surface * the surface area you want to protect * the desired operational life / the robustness of the materials to different particle sizes. Consequence is the impact of the risk if it happens. Since damage to the mobile lunar gantry is most likely not life threatening it lowers the “consequence” value (i.e. not as critical as it would be on a habitat module such as a TransHab design). As mentioned earlier debris kicked up from lander plumes could have a higher likelihood of occurrence than micro-meteorites so providing a side that has a higher level of shielding may be of interest if stationed near the landing site. Overall, the gas restraint layer will be made of robust materials such as Kevlar so that helps. An MMOD thickness trade study is well outside the scope of this concept study. Multi Layer Insulation (MLI) doubles as a good shielding material for micro-metiorites and would likely be needed for thermal management. The fact that you have considered the need for MMOD shielding in your designs shows design credibility since you are considering realistic environmental issues that will affect all systems deployed on the lunar surface.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  Due to extreme thermal variations and the unavoidable reality that there will be gas leakage, a gas regulation system will be needed. The design of this system is outside the scope of this challenge so don’t worry too much about the details. The gas regulation system will be tailored for the design concepts selected and its concept of operations. A gas regulation system will likely include a gas reservoir/or pressurized tanks, pumps, pressure and temperature sensors, etc. There are many options such as heaters to regulate the pressure in addition to pumps. The selection of the gas used is also an interesting trade. CO2 could be used and allowed to freeze out when not in use to reduce leakage, some gases have larger molecular sizes which would lower leakage rates, in addition some gases may be available from processing the lunar regolith for replenishment (i.e. O2).
  Expandable fillers and drop stitch inflatable structures are certainly options as the concepts are further explored however they do add a lot of technology and especially fabrication challenges. NASA has also explored epoxy coated materials where the hardener is introduced with the pressurant gases. This could provide a stiff structure after the gas has leaked out. Again, this would add technical risk and complexity. The HIAD system was used as a reference since the capability to fabricate these types of inflatable structural components is well developed and can be leveraged to build a near term prototype system that could be based on the concepts you develop. We really want to build something fast, test it, and improve the next design from what we have learned.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  IRAD funding at NASA is very limited and getting it allocated for external challenges such as the ALLGO challenge takes a lot of work. Tapping into the external expertise and passion for space exploration can provide a big return on our investment. The work you are doing shows these types of challenges are a great value for NASA so that even more external challenges will be considered.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  SALAHEDDINE L over 3 years ago

  would you be more specific i want to know the dimension of the mechanism while it is in the first stat the package if you cant give me a dimension you can guess the percentage of the volume from packaging state to a working state

  SALAHEDDINE L has uploaded 17 CAD models & has left 38 comments.
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  Kevin Kempton over 3 years ago

  For dimensional information on the required packaged state there is no specific answer I can provide. For estimated capacities of the SLS see the Mission Planner’s Guide: (https://ntrs.nasa.gov/citations/20170005323); the guides for commercially available launch vehicles can be found here (https://elvperf.ksc.nasa.gov/Pages/Vehicles.aspx).
  In addition to the launch vehicle uncertainty, the delivery to the lunar surface may come through a delivery to the Lunar Gateway and then transport to the surface with a reusable lunar lander. With a direct delivery the lunar lander and the ALLGO system will be integrated together into a single launch vehicle and sent to the surface without going through the Gateway so the volume of the lander must be included.
  One option that has been considered was to inflate the ALLGO system just prior to landing and use it as the landing gear then simply drop the propulsion package after landing. There was concern about an inflatable system being too bouncy for this method but there may be ways to limit this through crushable materials or having strict limits on final descent rates.
  Overall just showing a reasonable way the system can be efficiently packaged is what we are looking for since it would be scalable for different applications.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Qadamian over 3 years ago

  I wonder why an inflatable structure has been chosen? Why not a mechanical deployable structure?
  In case of leakage or damage, how that big amount of gas will be provided? Cause moon does not have atmosphere!

  According to challenge rules, is it allowed to combine a mechanical deployable structure with some inflatable bladders instead of using a whole inflatable structure?

  Qadamian has uploaded 4 CAD models & has left 37 comments.
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  Kevin Kempton over 3 years ago

  Some of the structure can be mechanical but the majority must be based on inflatable structural components since this is the focus of the ALLGO study. A primary goal of the ALLGO study is to investigate cargo-handling concepts based on inflatable structures to determine if they offer improved cost effectiveness over traditional unloading concepts on the lunar surface. As I mentioned, mass and volume constraints are critical factors when sending systems to the lunar surface. And again for the GrabCAD community, save your mechanical concept ideas since there will be a related challenge coming out on another crowdsourcing platform soon. I will provide details when it is released.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  A B over 3 years ago

  Ive got a few questions:

  1. Do all the sides have to be open, so you can drive over an object and pick it up, or can it be just one side opened up, or 2.

  2. Do the wheels have to have suspension? Or are you really only interested in delivering a small box, that when inflated, is the big crane, and for now dont care to much about parts like wheels. So basically the structure that is inflated, with the armor on the sides, and the structure that will carry the load. From a small package. Measured about the size of the picture of the first challenge post.

  3. What weight does the crane need to carry? The entire landing craft or the biggest, if not the whole chunk of one resupply run??

  4. What cargo module are you using? Block 1 Cargo, Block 1B Cargo, Block 2 Cargo. Because that is quite the difference in tonnage space lifted, and volume capacity. So that really restricts a design in how big it can be (if it even can be an entire payload).

  5. Can the crane take up an entire payload, or just a portion of 1 payload?

  I have something worked out here, and i think you will be pleasantly surprised by this. But i need to know the scope/boundaries of the project a bit better, in order to come up with a size and weight estimate.

  Greetings,

  A B

  A B has uploaded 27 CAD models & has left 182 comments.
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  Pramudia Taufiq over 3 years ago

  i wanna join, but iam just beginner, someday will joint

  Pramudia Taufiq has uploaded 0 CAD models & has left 1 comments.
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  geo over 3 years ago

  @Pramudia Taufiq: Don‘t worry. You will get a like from me for your participation :-)

  geo has uploaded 54 CAD models & has left 1102 comments.
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  geo over 3 years ago

  please see this video. A bridge with air.
  https://www.youtube.com/watch?v=32fho8JxSfY

  geo has uploaded 54 CAD models & has left 1102 comments.
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  Edson Germano Berticelli Vidal over 3 years ago

  I wonder how much expansive material (gas, air, etc.) is needed to inflate large structures to the point of causing pressure so great that it is capable of supporting large weights, because it is not just inflating it is necessary to make it rigid and structured, I think ... how many m³ of expansive material filled at high pressure in metal cylinders is necessary to inflate and structure 1m³ of bags to the point of stiffening it for hoisting and transporting (although the gravity on the Moon is 1.6g and Earth 9.8g ) large loads?
  can anyone share with us?

  Edson Germano Berticelli Vidal has uploaded 36 CAD models & has left 8 comments.
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  A B over 3 years ago

  That is the whole point of this design challenge, they are looking for someone with a good idea. You need something really special to get this done. Air alone wont do. Whenever the structure buckles there will be catastrophic failure. So you want to come up with a structure that will prevent the buckling from happening. The fiber material can only take pull strength and no push strength. In the PDF links that the NASA guys supplied there is information about the fabric and yarn direction. Also there is a link in the comments that shows how big and how heavy of a cargo load can be flown to the moon. The size of the crane has to be similar to the challenge picture. The crane has to transport heavy loads from the landing site to the moonbase, and has to be sturdy enough to do it, and more.. Just read carefully.

  The question im left with: how heavy of a load does the thing need to carry?! How do i design something is the load is a guestimate.

  But can someone answer the questions i had earlier? That would be really helpfull!

  One last thing about the inflatables: https://www.youtube.com/watch?v=1Q3YLKlwgDs, look at this, it really explains a lot, and shows a lot about the inflatables. Never the less, the buckling is the limiting factor of inflatables (in my opinion) unless someone comes up with a solution. That other link of the inflatable bridge really impressed me!

  A B has uploaded 27 CAD models & has left 182 comments.
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  Kevin Kempton over 3 years ago

  Geo: Great link on the inflatable bridge. I have not seen that one.

  As far as the pressure needed to support loads, I talked with the team who did the demo at link with a single air beam. They indicated the beam was inflated to about 60 PSI. This demo is a great analog for the max load expected for an ALLGO system since lunar gravity would reduce the load of a habitat module to about 1/6 of what it would be on Earth (or similar the same as the SUV on Earth!). See: https://www.braider.com/case-studies/high-pressure-airbeam.aspx

  This link has a lot of information on assessing loads on those inflatables. https://www.braider.com/case-studies/high-pressure-airbeam.aspx.
  AB had some good recommendations. A high fidelity loads analysis is not expected. Having a good concept that seems credible and a rough estimate is what we are looking for.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  Great link on the inflatable bridge. I have not seen that one.
  As far as the pressure needed to support loads, I talked with the team who did the demo at this link with a single air beam. They indicated the beam was inflated to about 60 PSI. This demo is a great analog for the max load expected for an ALLGO system since lunar gravity would reduce the load of a habitat module to about 1/6 of what it would be on Earth (or similar the same as the SUV on Earth!). See: https://www.braider.com/case-studies/high-pressure-airbeam.aspx
  This link has a lot of information on assessing loads on those inflatables. https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=4193&context=etd.
  AB had some good recommendations. A high fidelity loads analysis is not expected. Having a concept that seems credible is what we are looking for.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  A B over 3 years ago

  Im reading through: "Review of Habitable Softgoods Inflatable Design, Analysis, Testing, and Potential Space Applications".

  There is this sentence: "The system is required to deploy the habitat in a controlled and predictable -->madder<-- that is simulated and verified on
  the ground, before operation in space." That should be "manner" right? It might not be the right place to comment on this, but i could not think of any other place to report on this.

  I think my concept is the final solution to this problem of lifting heavy things with inflatables. I hope i can get it on cad detailed enough, but im a fast drawer (it will still take 1 or 2 full days of drawing on most of my models). :) I hope the other guys have read in on the matter as well.

  One more question though: Does the design also involve having to design the yarns and layers, or just the shape of the inflatable structure? Because that is a huge difference in detail. The patents mentioned in one of the PDFs sheds a lot of light on how this is done. But it really makes the design a lot more complex. I will try to involve it in my design, but its quite the task.

  A B has uploaded 27 CAD models & has left 182 comments.
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  javad kazemi over 3 years ago

  Hello to all the friends who are following closely.
  Consider the definition of pressure on Earth despite the pressure of the Earth's atmosphere being different from that of the Moon.
  If on Earth we can build a solid foundation to lift and lift loads with an air structure with 60 PSI, the same will surely happen on the moon.
  The moon has no atmosphere, so with the least amount of compressed air, the wind structure becomes too swollen.
  In our design, we must anticipate a hardening shell that prevents the inflated structure from swollen more than allowed.
  If a wind structure does not reach its final strength, it does not make sense to put pressure on it.
  And if we anticipate hardening of the pneumatic structure, its packaging will be a serious challenge.
  A technology is needed like hard shells in crabs.
  I will soon upload my own designs which can be good solutions.
  Good luck .

  javad kazemi has uploaded 23 CAD models & has left 38 comments.
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  Qadamian over 3 years ago

  Another question.
  In the explanations it's said: "... transport those payloads to the Artemis base camp that … will be located one or more kilometers away from the landing site".

  Well, a gantry that lifts payloads and transfers them to a location at least 1 kilometer away, will be exposed to different dynamic loads, and having lifted a payload to some height, its center of mass will have a greater Z component, decreasing its stability. Note that the payload is "hanging" hence causing more dynamic loads.
  All of these will make the design require more complicated suspension, control, and power system.

  INSTEAD, we can use a simple inflatable gantry that is designed for local use, and an inflatable pickup mars rover (like a pickup truck) that transports payloads to Artemis base camp. The gantry will have fewer batteries, simpler suspension, etc. It will only load the payloads on pickup.
  In a pickup, payloads have much more support, thus there is lower risk of damage to payloads. (compared to a hanging payload) and it inherently can go faster than a gantry will.

  Qadamian has uploaded 4 CAD models & has left 37 comments.
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  Edson Germano Berticelli Vidal over 3 years ago

  Interesting javad kazemi ... I had not considered this assumption ... the Moon has an expansive environment, so we will need less mass of expansive material to obtain the same 60 PSIs as on Earth ... brave ... it seems very logical ... but the question still remains ... how many kilos of mass of expansive material are needed to inflate 1 m³ of VectranTM balloon (example), so we can determine how much of this mass we should include in the delivery package to send up there. .. I think that this can only really be determined from the moment we build the first inflatable prototypes and do some tests in the conditions of the Earth's atmosphere and mainly in conditions that simulate the lunar atmosphere ... I am considering not addressing this requirement of the challenge, I will send subjective drawings, merely illustrative ... good luck to all ... hugs ...

  Edson Germano Berticelli Vidal has uploaded 36 CAD models & has left 8 comments.
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  Sergi Bada over 3 years ago

  Hi Edson, I guess you can estimate the mass of gas needed to infalte your inflatable volum by using the ideal gas law: https://en.wikipedia.org/wiki/Ideal_gas_law
  Given the desired pressure and volum, you can obtain the needed mass of gas at a certain temperature. I am not sure if this is what you were looking for.

  Sergi Bada has uploaded 3 CAD models & has left 38 comments.
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  Edson Germano Berticelli Vidal over 3 years ago

  Thanks Sergi Bada ... that's what I'm looking for ... I've been studying the gases for some time now, because I'm working on a project to determine the autonomy of a cylinder for domestic use while it is being used ... but even so I'm not sure of getting convincing results with precise and absolute numbers for this case ... thanks again and good luck ... very good your concepts for the challenge ... hugs ...

  Edson Germano Berticelli Vidal has uploaded 36 CAD models & has left 8 comments.
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  Kevin Kempton over 3 years ago

  There was a question on the modeling of specific weave configurations in the restraint layers. This level of detail is not expected. Determining the best weave for the restraint layers of inflatable shapes that are more complex than cylinders, tori, and spheres will be challenging. Note that hoop stress doubles with radius and that doubles the required amount of material so it is an interesting trade to determine the optimal size of the inflatable components since larger diameters have higher bending stiffness.
  A walking type of mobility is definitely not off the table and may be an option. However implementing a walking configuration may add complexity and typically requires sliding mechanisms that are susceptible to lunar dust. This would likely be a great option for small moons and asteroids where gravity is very low and gossamer type self-hardening inflatable structures could be used.
  A concept that utilizes a gantry/cart combination can be looked at since a dedicated cart may be a better way to move heavy items over long distances. The gantry could tow the cart or the cart could tow the gantry. Lots of options here.
  Finally, another item from the folks that did the AirBeam demo with the SUV was that the inflatable material was about 0.3 to 0.6 pounds per square foot of surface area and when tightly packaged for shipping the density was about 20 pounds per cubic foot.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  I wanted to let the ALLGO challenge participants know about a closely related challenge that just came out today! The thoughts and ideas that you have put into the ALLGO challenge can give you a big start on this new lunar delivery challenge which has a much broader scope: See https://www.herox.com/LunarDelivery

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Qadamian over 3 years ago

  Well, how about a single cart (without gantry) that can pull the payload up on-board using a foldable inclined ramp and a winch?
  This configuration will be smaller in size and more power efficient.

  Qadamian has uploaded 4 CAD models & has left 37 comments.
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  Kevin Kempton over 3 years ago

  A single cart is not what we ate looking for since the ALLGO study was funded to investigate offloading systems that are mobile and based primarily on inflatable structural components due to their potential for mass and packaging advantages over traditional structures.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  A single cart is not what we are looking for since the ALLGO study was funded to investigate offloading systems that are mobile and based primarily on inflatable structural components due to their potential for mass and packaging advantages over traditional structures.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Kevin Kempton over 3 years ago

  A single cart is not what we are looking for since the ALLGO study was funded to investigate offloading systems that are mobile and based primarily on inflatable structural components due to the potential mass and packaging advantages over traditional structures.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Jouni Huopana over 3 years ago

  How is it with the IP? Is it acceptable to use this ALLGO project as part of the Herox competition or has there been a IP change after this competition closes.

  Jouni Huopana has uploaded 3 CAD models & has left 41 comments.
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  Kevin Kempton over 3 years ago

  As far as the IP question. It will be OK to use your designs in the HeroX competition but they are looking for more conceptual ideas. If you are a winner in this competition and get an award you will want to make some modifications for the HeroX competition since the government does not like to pay for the same thing twice. This should not be an issue since the submittal requirements for the HeroX unloading challenge are different those in the ALLGO challenge so you will have to provide some additional information such as a concept of operations.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  A B over 3 years ago

  The entry closed one hour too soon. But i did have everything ready by that time. However if someone was too late due to that, with a good entry, but could not join its a big problem, in my opionion. I worked a very long time to get everything done as it is. But to my shock the igs file was bad, it did not show anything for me. Now it is step, and that works for me. I hope you have files that work for you. Other people upload igs with no trouble for them, but my solidworks 2018 just does not read them.

  Also i had to do entry twice to make my model show up on the chellange, as you can see at my profile. I think i have the right formula to fit the bill, but getting this thing to upload, man.... Im delirious now.

  With all due respect! Thank you for your time.

  Greetings A B

  A B has uploaded 27 CAD models & has left 182 comments.
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  Eduard Osypchuk over 3 years ago

  "...if someone was too late due to that, with a good entry, but could not join its a big problem..." - I think they can publish their concept on HeroX, in a similar event.

  Eduard Osypchuk has uploaded 3 CAD models & has left 2 comments.
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  A B over 3 years ago

  Nah, that wont be any good. The grabcad guys emailed me asked if i needed to be put in. So i said: no im already listed. Anyway, a lot of work has been put in. So i rather have it judged and see if they like it.

  A B has uploaded 27 CAD models & has left 182 comments.
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  Tommy Mueller over 3 years ago

  Way to go everyone!
  Good long list of finalists results!!
  …
  Lots of smart people and great ideas throughout the challenge entries too, and of course it’s always cool to contribute and compete with our ideas for NASA challenges. Bests of luck to all the finishers!

  Tommy Mueller has uploaded 224 CAD models & has left 1893 comments.
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  Vaclav Lhota over 3 years ago

  My words Tommy. Hoping our ideas have some value. And looking forward to the next space task:)

  Vaclav Lhota has uploaded 3 CAD models & has left 57 comments.
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  ANOUAR BARODI over 3 years ago

  Thanks Nasa jury for choosing my concept among all these good ideas, congrats to the finalists and all the participants, Good luck to all !!!

  ANOUAR BARODI has uploaded 98 CAD models & has left 1661 comments.
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  Riccardo Rabotti over 3 years ago

  Well done to everyone, so many great ideas.
  Few more long days of waiting to know the results.
  Best of luck to all designers.

  Riccardo Rabotti has uploaded 5 CAD models & has left 4 comments.
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  Juraj Antonak over 3 years ago

  Congratulations to all finalists, lots of inspiring designs and some great animations.

  Juraj Antonak has uploaded 1 CAD models & has left 4 comments.
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  Jouni Huopana over 3 years ago

  This NASA challenge has been great and interesting to see how people produce innovative solutions. Good luck to all!

  Jouni Huopana has uploaded 3 CAD models & has left 41 comments.
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  Christie S over 3 years ago

  I was nice having new contact on GrabCAD and so much people loving space innovation.

  Christie S has uploaded 42 CAD models & has left 88 comments.
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  Christie S over 3 years ago

  Just a question, How do you know you are a finalist ?

  Christie S has uploaded 42 CAD models & has left 88 comments.
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  Tommy Mueller over 3 years ago

  You are 6th from the top of the finalist list on the challenge results page, and the list is in no particular order https://grabcad.com/challenges/nasa-challenge-an-advanced-lightweight-lunar-gantry-for-operations-allgo/results

  Tommy Mueller has uploaded 224 CAD models & has left 1893 comments.
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  Aniello Sessa over 3 years ago

  Thank you guys.
  Thanks to all of you and GrabCad.
  I didn't think there was a wonderful community like this.
  I joined eight years ago but I never realized how many opportunities this site offers.
  You are wonderful people!
  By engaging in these latest challenges, I have better understood my skills and shortcomings (including the graphics card;)
  Good luck to all !!!

  Aniello Sessa has uploaded 13 CAD models & has left 91 comments.
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  Qadamian over 3 years ago

  Thanks to all participants and managers of this challenge.
  Lots of things was learned and good experiences gained.
  After all, I'm happy ideas and solutions will be obtained through this challenge to help solve real-world problem(s), that's best thing can happen to an engineer's design.

  Qadamian has uploaded 4 CAD models & has left 37 comments.
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  ADEL REKIK over 3 years ago

  I want to thank the big team of NASA also all friends participants . for me it is a big pleasure to learn from you all and really it confirms that the earth is so small and we are nearest every one to other but Future make us standing to help HUMAN to go on for the VAST UNIVERSE and it becomes easy by assembled efforts from all engineers from the world. thank you very much

  ADEL REKIK has uploaded 10 CAD models & has left 22 comments.
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  Germano Pecoraro Designer over 3 years ago

  My compliments to all selected.
  However, I don't understand "how" some of these projects work, especially how they load / unload the goods (!?).

  Germano Pecoraro Designer has uploaded 35 CAD models & has left 62 comments.
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  TARUN KUMAR DUTTA over 3 years ago

  I have gain lot of Experience from this challenge, Thanks

  TARUN KUMAR DUTTA has uploaded 6 CAD models & has left 8 comments.
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  Christie S over 3 years ago

  Hello to the GrabCAD community, this is my first challenge, are we supposed to update our study regarding questions asked or things we did not have time to achieve ?

  Christie S has uploaded 42 CAD models & has left 88 comments.
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  Sava Savov over 3 years ago

  Christie, you can update it once nothing is locked, but it is not certain whether this update will be considered. But it is also possible to be taken into account... So you better do the update. I don't think that breaks any rules.

  Sava Savov has uploaded 25 CAD models & has left 149 comments.
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  NISHANTH M over 3 years ago

  We will get any participation certificate ?

  NISHANTH M has uploaded 1 CAD models & has left 3 comments.
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  Kesa over 3 years ago

  Winners have been posted

  Kesa has uploaded 3 CAD models & has left 211 comments.
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  Kesa over 3 years ago

  Nishanth, We usually create certificates for our Winners per their request.

  Kesa has uploaded 3 CAD models & has left 211 comments.
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  ANOUAR BARODI over 3 years ago

  Wow !!! Thanks so much Nasa and GrabCAD for choosing my concept among the winners, I am really happy and feel very honored with my concept, thank you very very much, and congratulations to all the winners, finalists and all participants !!!
  good luck to all, and see you next time guys.

  ANOUAR BARODI has uploaded 98 CAD models & has left 1661 comments.
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  ADEL REKIK over 3 years ago

  congratulations my friend very good job

  ADEL REKIK has uploaded 10 CAD models & has left 22 comments.
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  Team AA - Star over 3 years ago

  Will there be any sort of certificate for Top 20 finalists?
  We will be glad if we had a document conforming that we made it to top 20 finalists.

  Team AA - Star has uploaded 1 CAD models & has left 36 comments.
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  Sava Savov over 3 years ago

  You can make one with Photoshop :)

  Sava Savov has uploaded 25 CAD models & has left 149 comments.
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  Sergi Bada over 3 years ago

  Congratulations! You guys did a really good job.

  Sergi Bada has uploaded 3 CAD models & has left 38 comments.
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  Christie S over 3 years ago

  Thank you so much, I couldn't believe going to the end with the finalists (just a question (stupid as usual ;) )) Is the challenge over ? can I announce the result to my family ( I have a doubt because there is still the text at the end that says that it is not finished)

  Christie S has uploaded 42 CAD models & has left 88 comments.
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  Jouni Huopana over 3 years ago

  https://www.nasa.gov/feature/langley/nasa-announces-moon-supply-unloading-system-design-winners

  Jouni Huopana has uploaded 3 CAD models & has left 41 comments.
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  NISHANTH M over 3 years ago

  CONGARATS CHRISTIE AND ALSO OTHER WINNERS

  NISHANTH M has uploaded 1 CAD models & has left 3 comments.
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  NISHANTH M over 3 years ago

  KESA,
  WE WILL BE HAPPY, IF WE ARE PROVIDED WITH PARTICIPATION CERTIFICATE ATLEAST. CERTIFICATE FROM NASA WILL A WONDERFUL ONE FOR OUR CAREER. THATS WHY WE REQUESTED FOR CERTIFICATE SIR
  THANK YOU SIR

  NISHANTH M has uploaded 1 CAD models & has left 3 comments.
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  javad kazemi over 3 years ago

  Thank you very much to the GrabCad group & ....
  Many thanks to the challenge handler and referees.
  You have done a lot of hard work and responsibility.
  These challenges are a good space to share the ideas and creativity of outstanding and motivated people, it is very valuable.
  Being in this group with friends is a great success for me.
  The important thing is to be able to move with a strong and good group, surely everyone who has worked harder and spent more time deserves to be first.
  Congratulations to all the good friends.
  The challenge team, the judging panel, and all the good friends who helped us learn more with their creative and beautiful ideas.
  Thank you all

  javad kazemi has uploaded 23 CAD models & has left 38 comments.
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  Kevin Kempton over 3 years ago

  I would like to thank everyone in the GrabCAD community who contributed and collaborated on the ALLGO challenge. The down select was really difficult due to the large number of excellent and innovative entries.
  The choice of winners leaned toward the solutions with less technical risk that could be fielded to support early Artemis operations. Over the next few months we will be putting together a Concept of Operations Document that will include many of the concepts provided as well as some additional details on the requirements and constraints of a mobile lunar gantry system. After that we will be developing a proposal that will (hopefully) allow us to fabricate a prototype system that we could use to acquire some test data on deployment and loading.
  Again, there is a similar challenge on lunar delivery system concepts currently running on a different platform. If you enjoyed this challenge, you may want to form teams and enter a submission.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Rabah slimani over 3 years ago

  hi Kevin Kempton is it possible for the winning entries to participate to the lunar delivery system challenge with an enhanced version or should we come up with a new design?

  Rabah slimani has uploaded 7 CAD models & has left 21 comments.
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  Kevin Kempton over 3 years ago

  All ALLGO entries can participate in the Lunar Delivery challenge. Look at the submission form requirements under the guidelines tab. The lunar delivery challenge is not restricted to using inflatable structural components as this challenge was. Just as almost every submission had innovative ideas, they also had weaknesses in at least one or more areas (deployment, mobility, lifting, packaging, etc.). I believe you will want to collaborate with other submitters to take the best parts and synthesize them into something even more credible and compelling. Much will be based on your descriptions. The models will help communicate what you are describing.

  Kevin Kempton has uploaded 0 CAD models & has left 35 comments.
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  Sergi Bada over 3 years ago

  does someone want to team up to take part in the Lunar Delivery Challenge? https://www.herox.com/LunarDelivery

  Sergi Bada has uploaded 3 CAD models & has left 38 comments.
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  Shrikunj Patel over 3 years ago

  i would like to team up ... i am currently working on some ideas ... let me know if u r interested

  Shrikunj Patel has uploaded 7 CAD models & has left 6 comments.
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  Robert Peters - BERO over 3 years ago

  @Sergi Bada .... I'm interested in the team up.

  Robert Peters - BERO has uploaded 27 CAD models & has left 21 comments.
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  Christie S over 3 years ago

  Thank you again for selecting my project. A little update with the axes that were not quite right using a double axes is better : https://youtu.be/83tV3Qk8unE.
  I have been thinking about the next project of the Nasa and I have some new ideas I will share ;)

  Christie S has uploaded 42 CAD models & has left 88 comments.

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