Recent content by Martin R.

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  1. M

    Chip is making progress with the Merlin Lite

    I'm not sure if you are allowed to add ca. 30 pounds (for 5 gallons fuel): https://rainbowaviation.com/wp-content/uploads/2017/08/elect-103-battry-def.pdf " ...... Although batteries may indeed be used to provide power to an electric motor, the FAA does not agree that those batteries should...
  2. M

    Jim Bede's Inflatable Wings

    At least this one ... http://www.prospective-concepts.ch/pdf/projekte/pneuwing_en.pdf .... flew. And here ..... https://www.empa.ch/web/s307 .... an interesting new department of the Swiss EMPA.
  3. M

    Nenadović biplane

    Here is a better translation with which the French RSA helped me. Unfortunately, my query about the whereabouts of the other AS-37 mentioned in the article did not reveal anything. It is quite possible that only the F-WYBG was flown for a longer time.
  4. M

    Nenadović biplane

    Here you will find some considerations from Rudy Nickel - a very experienced builder and pilot - who built and flew an AS-37 at the end of the seventies: André Starck Archives - Passion pour l'aviation The article was published in the RSA magazine no 100-101. It is written in French and the...
  5. M

    Nenadović biplane

    https://www.homebuiltairplanes.com/forums/threads/tech-specs-of-hybrid-powercraft-for-115kg-airplanes-ar-motogliders.34790/
  6. M

    How to incorporate a Hydrogen fuel cell into an electric aircraft for Homebuilders?

    August 6, 2009: already forgotten? https://cafe.foundation/blog/man-of-la-manche/ https://www.aero-expo.com/aero-en/press/press-releases.php?obj_id=128&sMode=detail
  7. M

    Tandem-wing LSA/microlight concept and poll

    Thank you Hot Wings that you emphasized the word "like" in your posting. I see that the same way. But since I learned that the Mignet Cordouan* is no longer a Flea because he as ailerons, I try to be as restrictive as possible in this forum ;) For example I ask myself if this mechanism in a so...
  8. M

    Tandem-wing LSA/microlight concept and poll

    Sorry! In my previous posting I better should have shown the text in the NACA contractor report CR 3135 page 1 (pdf-page 10) https://ntrs.nasa.gov/api/citations/19790013869/downloads/19790013869.pdf As I’m not aerodynamicist I just can repeat what I read in the different NACA “freewing”-...
  9. M

    Tandem-wing LSA/microlight concept and poll

    Why do you want to limit the deflection of the tab? On a true freewing the tab deflects always in the opposite sense of the wing panel: NASA CR 3135 / page 3 (pdf-page 12) https://ntrs.nasa.gov/api/citations/19790013869/downloads/19790013869.pdf Of course, the axis of rotation must be...
  10. M

    Tandem-wing LSA/microlight concept and poll

    Sorry that I didn't mention it. But when I think about free-wings, I automatically also think of a single one. “three axis <> Pou-du-Ciel”: In Europe I would say: “be not more Catholic than the Pope” ;-) The CORDOUAN has ailerons and “belongs” nevertheless to the Pou-du-Ciel formula. Hm-1100 -...
  11. M

    Tandem-wing LSA/microlight concept and poll

    Why do you use your push-pull cable just for the wing-incidence? If you mount the control tabs separately on each wing, you could pretty simple produce an elevon-effect and we would have an interesting full 3-axis aircraft. ;)
  12. M

    Tandem-wing LSA/microlight concept and poll

    A real Spratt wing (also called free wing) is absolutely independend from other forces than the laminar air-flow. Like a weather vane! This requires that the fuselage hangs (a little bit in front of the center of pressure) like a pendulum on the wing. That’s why you can’t “force” the airfoil...
  13. M

    Tandem-wing LSA/microlight concept and poll

    In my opinion the classification in Canard or Tandem is irrelevant in this case. (The developers called it a Tandem). Just look at the countless very interesting details of Lockspeisers projects . Especially in terms of simplicity:
  14. M

    Tandem-wing LSA/microlight concept and poll

    Does 150% means that the front wing should carry one and a half times the weight of the rear wing? (e.g. MTOM = 450 lbs --> front wing = 270 lbs, rear wing = 180 lbs) Or should we try to respect a one and a half relation with regard to the wing-loading? (e.g. front-wing 17.1 lbs/ft^2, rear-wing...
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