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  1. M

    I.C.E. is dead, Long Live I.C.E.

    No. But the input in the solar panels is free. Unlike other methods of hydrogen generation! As a graduate economist, I assume that I'm able to calculate the costs of electricity from solar panels or wind turbines, etc. Including operating costs, depreciation, site costs, etc. But let's forget...
  2. M

    I.C.E. is dead, Long Live I.C.E.

    If the energy required for electrolysis is practically free (e.g. solar energy), then the efficiency is not so important.
  3. M

    BEACHDRAGON, a fun project. Low aspect ratio-BSLD-ridge soaring.

    That's also my opinion. But until then: Why not try a simple solution with a Tensairity spar* (not "Tensegrity"!!!) in form of a Princeton sailwing in roundspar configuration ** *...
  4. M

    Flying wing as cheap and simple option for basic fun flying.

    In a small low-wing aircraft with a cantilever wing, the main spar usually goes right through the cockpit on the fuselage floor. That's why - depending on the height of the spar - important space for the pilot is lost. In the worst case the fuselage becomes higher than necessary to guarantee the...
  5. M

    Flying wing as cheap and simple option for basic fun flying.

    Volksplane VP-1 and VP-2 designed by the aeronautical engineer William Samuel Evans:
  6. M

    Flying wing as cheap and simple option for basic fun flying.

    I can't find a report at the moment either. Don't forget: The institutions that investigate flight accidents in Switzerland (especially those in the paragliding and trike sector) changed in the last 22 years (the accident happened in 1994)! But if I remember correctly, the paper was written in...
  7. M

    Flying wing as cheap and simple option for basic fun flying.

    I absolutely agree. But: why not describe a new idea for a simple wing in this thread? If enough people are interested we will open a new thread. But only in this case! Because if you start a new thread for every single new idea or question, the index of threads overflows and the overview of...
  8. M

    Flying wing as cheap and simple option for basic fun flying.

    Exactly! But that's difficult here :(. I tried in another thread* to show ideas as described in the paper: "An inflatable wing using the principle of Tensairity" https://repository.tudelft.nl/islandora/object/uuid:306785d0-f75b-4378-a145-75905c83efa7/datastream/OBJ/download .... and somewhere...
  9. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    Yes. Airmat (for a aircraft wing) ---> Drop-Stitch Technology (for inflatable stand-on-top paddle-boards ---> ? One more reason to think (sometimes) outside the box ;) Here other technologies (ClustAir and VacuuAir) that you could imagine for a wing construction: TRIPSTIX Clustair technology...
  10. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    https://link.springer.com/article/10.1016/S1672-6529(11)60028-0
  11. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    I'm sorry I don't understand this play on words. English isn't my mother tongue. But anyway: I hope my posting might be a bit clearer now :)...
  12. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    Thank you J.L. We just have a little difference: You're talking about tensegrity wings. I of those who work with the Trensairity technique. I'm copying from the first section of the link below: ".... The key principle of Tensairity is to use low pressure air to stabilize compression elements...
  13. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    Where? Do you have bookmarks or references? Thanks
  14. M

    Is there a cheapest/lightest/simplest wing structure other than aluminium tube and fabric?

    Maybe not yet the cheapest, but nevertheless very interesting*: https://repository.tudelft.nl/islandora/object/uuid:306785d0-f75b-4378-a145-75905c83efa7/datastream/OBJ/download https://www.tensairitysolutions.com/ * perhaps in connection with a Princeton Sailwing ;)...
  15. M

    Flight stick mixer of Little Bird by Milt Hatfield

    Look also at 7:05
  16. M

    Low aspect ratio sport plane ideas

    Perhaps a little bit like this one: https://www.homebuiltairplanes.com/forums/attachments/e0f95ebc-37b1-4f08-91a8-1827c6473073-png.119730/ in https://www.homebuiltairplanes.com/forums/threads/tandem-wing-duo-mono-old-design.37466/#post-636833
  17. M

    Low aspect ratio sport plane ideas

    Correct. I think so too . Here the Google-translated text of a russian posting of 2010: Размер имеет значение! - Авиамодели On Wednesday, they flew around such a plane. It's called "Aerobike" Span 4 m, model engine, 10 l / s, empty weight 25 kg, estimated load capacity 70 kg. It was not I who...
  18. M

    Low aspect ratio sport plane ideas

    Here: Lightest World Plane Demonstrated in Lenexpo you should find the following text: "..... OREANDA-NEWS. August 17, 2010. The lightest airplane in the world (30 kg) was demonstrated in the pavilion 7 of “Lenexpo” exhibition and congress complex, which hosted the First International Salon of...
  19. M

    Electric Hybrid

    https://jakadofsky.com/index1.php?lang=en&bereichID=11 :):):)
  20. M

    Electric Hybrid

    Just look here: Home e.g. 2-stroke boxer 2B350 that weighs 16.31 lbs "... Power - 20.7 kW (28 HP at 6800 rpm, up to 45HP with tuning pipe) ..."
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