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

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NASA is seeking to challenge the GrabCAD Community to design a mobile lunar gantry based on a structural framework of inflatable structural components.

Deployment and operations of a lunar base requires an effective system to unload payloads from various lander configurations and transport those payloads to the Artemis base camp that, for safety reasons, will be located one or more kilometers away from the landing site.

This contest is in support of a NASA concept study called the Advanced Lightweight Lunar Gantry for Operations (ALLGO). The goal of the ALLGO study is to develop an innovative, low-mass unloading system based on inflatable structural components that can be tightly packaged and easily deployed on the lunar surface. This system could be scaled up to operate with very large landers that have a high payload deck. An ALLGO mobile lunar gantry system could also be used for other routine operations at the Artemis base camp such as integrating large components or transporting ISRU materials for processing.

A successful outcome of this contest is a 3D model of an effective mobile lunar gantry with a primary structure composed of inflatable components such as beams, arches, and tori. In addition, a basic structural analysis is desired that will be used to help assess the designs and potentially help in prototyping a subscale system in a follow-on to the ALLGO study. Contest submissions must include:

1. CAD models of a deployed mobile lunar gantry utilizing inflatable components for much of the primary structure (Submissions to be provided in STEP or IGES
file formats).
2. Include a concept for packaging the mobile lunar gantry system that shows a feasible method of deployment from a packaged state on a lunar lander. This may be provided in 2D drawings or as a 3D model.
3. Provide an estimate of system mass and packaged (stowed)/deployed size.

Renderings of the system in operation will be used to help communicate the concept and potentially be used in follow-on proposals for continued development of the
concept.

An estimate of the maximum loads that the mobile lunar gantry submission can accommodate, and an estimate of power consumption for operation of loading/transporting are encouraged.

For this contest, a basic concept has been provided as a starting point. The concept is expected to be deployed from a lander without direct human support. Additional
features of a mobile gantry system would likely include:
1. Solar arrays that provide power to charge on board batteries and avionics
2. Modular wheel assemblies to reduce part count
3. Hoist system for lifting payloads.
4. Inflatable structure that consists of an inner layer bladder with low gas permeability and structural restraint/shielding outer layers that support large loads and protect the inflatable structure against the harsh lunar environment (UV, extreme temperature, dust, micrometeoroids and orbital debris (MMOD) impact). Candidate bladder materials include, but are not limited to, a Kapton ® HN polyimide, Essar Stretch TM polyimide and silicone coated Vectran TM . Candidate outer layer materials include but not limit to Vectran TM , Kevlar ® , Nomex ® , Zylon ® , Beta Cloth and Nextel TM . Additional MMOD shields such as Whipple shield can be installed for a sensitive area.
5. Gas regulation system (it is likely the internal pressures would be greatly reduced when not in use to reduce gas leakage).
6. Adjustable cable stays or material connections to provide additional structural support.
7. External Power Connector: The system must survive the lunar night and may have a connector to an external power source where it would dock when not in use.
8. Wireless Communication System: The system is expected to be tele-operated from a pre-deployed local wireless network which will manage communications from the Earth if human operators are not at the Artemis base camp.
Assume that the mobile lunar gantry will operate in an area with rocks/craters less than 0.25 meters in height/depth and with slopes less than 5 degrees. Multi-wheeled versions may offer mobility advantages over the 4 wheeled concept provided for more rugged lunar terrains.
Ideas that should be excluded:
1. Avoid concepts that require direct human contact or custom robotics to deploy.
2. Avoid concepts that are difficult or cumbersome to operate.
3. Avoid concepts that are extremely complex as this adversely impacts fabrication, reliability, and increases risk.
4. Avoid concepts that have significant safety issues (i.e. high pressures, susceptibility to tipping during operation, etc.).

For information on potential lunar landers see: https://www.nasa.gov/press-release/nasa-names-companies-to-develop-human-landers-for-artemis-moon-missions
and also
https://www.nasa.gov/content/commercial-lunar-payload-services
For information on the Artemis roadmap see:
https://www.nasa.gov/sites/default/files/atoms/files/a_sustained_lunar_presence_nspc_report4220final.pdf
For an example of an inflatable structure/materials being used in space flight see:

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130013167.pdf
https://ntrs.nasa.gov/citations/20190001443
https://ntrs.nasa.gov/citations/20190000847

There are several commercial companies offering structures that incorporate inflatable components in their designs.
These systems may be applicable for use a mobile lunar gantry.
An example paper that discusses the structural loads on inflatable structures: https://www.researchgate.net/publication/235213999_Air-Inflated_Fabric_Structures

The images below represent an example concept of a mobile lunar gantry based on an inflatable structure.
Challengers are free to use this as a starting point or to design a completely different configuration.

First Image (High Res): https://imgur.com/a/CHqSQak

Requirements

  • JUDGING CRITERIA


    1. Operational feasibility of unloading and transporting lunar payloads
    2. Feasibility of operating in a lunar environment
    3. Feasibility of deploying from a packaged state
    4. Feasibility of packaging inside a launch vehicle
    5. Feasibility of manufacturing and fabrication
    6. Quality and fidelity of the 3D models

  • TECHNICAL SPECIFICATIONS


    1. Model File Formats shall be delivered in STEP or IGES.
    2. Renderings: Two separate viewing angles and a packaged/Pre-deployed view (.jpg
    or .png formats)
    3. Any supplemental description documents shall be in PDF format
    4. If zipped, the file compression shall be compatible with Windows 10 and not
    require any special software to unzip.

Rules

  • ENTERING THE COMPETITION:


    If you think an entry may infringe on existing copyrighted materials, please email challenges@grabcad.com.


    By entering the Challenge you:

      1) Accept the official GrabCAD Challenges Terms & Conditions.
      2) Agree to be bound by the decisions of the judges (Jury).
      3) Warrant that you are eligible to participate.
      4) Warrant that the submission is your original work. Warrant, to the best of your knowledge, your work is not, and has not been in production or otherwise previously published or exhibited.
      5) Warrant neither the work nor its use infringes the intellectual property rights (whether a patent, utility model, functional design right, aesthetic design right, trademark, copyright or any other intellectual property right) of any other person.
      6) Warrant participation shall not constitute employment, assignment or offer of employment or assignment.
      7) Are not entitled to any compensation or reimbursement for any costs.
      8) Agree the Sponsor and GrabCAD have the right to promote all entries.


  • SUBMITTING AN ENTRY


    Only entries uploaded to GrabCAD through the "Submit entry" button on this Challenge page will be considered an entry. Only public entries are eligible. We encourage teams to use GrabCAD Workbench for developing their entries. Entries are automatically given the tag "NASAGANTRY2020" when uploading to GrabCAD. Please do not edit or delete this tag. Only entries with valid tag will participate in the Challenge.

  • AWARDING THE WINNERS

    The sum of the Awards is the total gross amount of the reward. The awarded participant is solely liable for the payment of all taxes, duties, and other similar measures if imposed on the reward pursuant to the legislation of the country of his/her residence, domicile, citizenship, workplace, or any other criterion of similar nature. Only 1 award per person. Prizes may not be transferred or exchanged. All winners will be contacted by the GrabCAD staff to get their contact information and any other information needed to get the prize to them. Payment of cash awards is made through PayPal. All team awards will be transferred to the member who entered the Challenge.

  • We will release the finalists before the announcement of the winners to give the Community an opportunity to share their favorites in the comments, discuss concerns, and allow time for any testing or analysis by the Jury. The Jury will take the feedback into consideration when picking the winners.


    Winning designs will be chosen based on the Rules and Requirements.

  • Schedule


    This Challenge ends on November 2nd, 2020 (23:59 EST.) Finalists will be announced on November 16th, 2020. Winners will be announced on November 23rd, 2020.

Prizes

$7000 In Prizes

First Place

$3000

Second Place

$2000

Third Place

$1000

Fourth Place

$750

Fifth Place

$250

About NASA: Space Technology Mission Directorate

This contest supports the Advanced Lightweight Lunar Gantry for Operations feasibility study. This study is sponsored by the NASA Space Technology Mission Directorate’s Center Innovation Fund through the Langley Research Center’s Office of Chief Technologist. The study will help inform lunar mission architects who are selecting the
systems that will be used to support the Artemis Base Camp.

39 comments

  • Ikponmwosa Obasogie

    Ikponmwosa Obasogie about 1 month ago

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

    Ikponmwosa Obasogie has uploaded 2 CAD models & has left 8 comments.
  • Ikponmwosa Obasogie

    Ikponmwosa Obasogie about 1 month ago

    And the first link doesn't work

    Ikponmwosa Obasogie has uploaded 2 CAD models & has left 8 comments.
  • Ikponmwosa Obasogie

    Ikponmwosa Obasogie about 1 month ago

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

    Ikponmwosa Obasogie has uploaded 2 CAD models & has left 8 comments.
  • Kesa

    Kesa about 1 month ago

    First link is fixed

    Kesa has uploaded 2 CAD models & has left 146 comments.
  • Ikponmwosa Obasogie

    Ikponmwosa Obasogie about 1 month ago

    Thanks @kesa

    Ikponmwosa Obasogie has uploaded 2 CAD models & has left 8 comments.
  • Kevin Kempton

    Kevin Kempton about 1 month 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 9 comments.
  • Kamen Rusev

    Kamen Rusev 30 days 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 55 CAD models & has left 270 comments.
  • Ashish Karanam

    Ashish Karanam 30 days 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 1 comments.
  • Vaclav Lhota

    Vaclav Lhota 29 days ago

    Don't cry lads and get to work!

    Vaclav Lhota has uploaded 3 CAD models & has left 47 comments.
  • Kenneth Keiser

    Kenneth Keiser 27 days 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.
  • Chunduru Amareswara Prasad

    Chunduru Amareswara Prasad 26 days 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.
  • Sergi Bada

    Sergi Bada 26 days ago

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

    Sergi Bada has uploaded 1 CAD models & has left 3 comments.
  • Paulo Mueller

    Paulo Mueller 25 days ago

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

    Paulo Mueller has uploaded 0 CAD models & has left 1 comments.
  • Bryan Cierniak

    Bryan Cierniak 21 days 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 37 CAD models & has left 4 comments.
  • Ghosmader

    Ghosmader 21 days ago

    Let´s game on

    Ghosmader has uploaded 1 CAD models & has left 1 comments.
  • vignesh kumar M

    vignesh kumar M 20 days ago

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

    vignesh kumar M has uploaded 6 CAD models & has left 2 comments.
  • Jouni Huopana

    Jouni Huopana 20 days ago

    The links provide some numbers, check the researchgate paper.

    Jouni Huopana has uploaded 3 CAD models & has left 12 comments.
  • Roberto Oliveira

    Roberto Oliveira 17 days 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.
  • Kevin Kempton

    Kevin Kempton 15 days 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 9 comments.
  • javad kazemi

    javad kazemi 15 days 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 21 CAD models & has left 34 comments.
  • Germano Pecoraro

    Germano Pecoraro 14 days 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 has uploaded 10 CAD models & has left 26 comments.
  • Kevin Syc

    Kevin Syc 13 days 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 1 CAD models & has left 3 comments.
  • Jin Ho Kang

    Jin Ho Kang 12 days 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.
  • Kevin Kempton

    Kevin Kempton 11 days 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 9 comments.
  • Kevin Kempton

    Kevin Kempton 11 days 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 9 comments.
  • javad kazemi

    javad kazemi 10 days 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 21 CAD models & has left 34 comments.
  • Nahuel Costa

    Nahuel Costa 10 days 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 2 CAD models & has left 8 comments.
  • TC

    TC 9 days ago

    I understand the usefulness of an inflatable system (volume and weight) but I wonder about the relevance of the use of a gas: the thermal variations will influence the rigidity of the structure and the leaks will be inexorable.
    Also, is it not advisable to inflate the structure with an expandable polymer (styrene, isocyanurate ... + gaseous reagent) in order to obtain a durable "honeycomb" composite structure?
    The "drop-stitch" technology would lend itself well to this type of construction: a skin to work in traction and the internal threads trapped in the polymer matrix working in compression.
    The reservoirs containing the reagents could then be abandoned or recycled.
    We could also use moon dust as filler like glass balls in fiberglass construction or plastic objects? However, this would require on-site machinery in order to perform the mixing as well as the need to control the hardening time of the injected compound.

    TC has uploaded 13 CAD models & has left 64 comments.
  • Nikola Mudrinski

    Nikola Mudrinski 8 days 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 6 CAD models & has left 19 comments.
  • Vaclav Lhota

    Vaclav Lhota 8 days 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 47 comments.
  • Kevin Kempton

    Kevin Kempton 8 days 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 9 comments.
  • Kevin Kempton

    Kevin Kempton 8 days 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 9 comments.
  • Kevin Kempton

    Kevin Kempton 8 days 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 9 comments.
  • SALAHEDDINE Laalmi

    SALAHEDDINE Laalmi 8 days 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 Laalmi has uploaded 17 CAD models & has left 39 comments.
  • Kevin Kempton

    Kevin Kempton 4 days 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 9 comments.
  • A.H. Ghadamian امیرحسن قدمیان

    A.H. Ghadamian امیرحسن قدمیان 4 days 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?

    A.H. Ghadamian امیرحسن قدمیان has uploaded 15 CAD models & has left 6 comments.
  • Kevin Kempton

    Kevin Kempton 3 days 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 9 comments.
  • A B

    A B about 19 hours 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 18 CAD models & has left 82 comments.
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