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  1. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    Two movable wings and funny tail ...not elegant at all. Rather clumsy with odd loking tail, outdated landing gear and who knows what mechanics involved into flapping wing drive. Clumsy is not "clump" (as you wrongly understand) for instance a balet dancer is elegant, while a circus clown is...
  2. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    I dont understand what drives some guys to design such clumsy planes?
  3. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    Thank you for video! Isnt 20m wingspan a bit too much for a foot launchable?
  4. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    Nice to see you are still here around! :)
  5. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    Mostly a classical wooden design.
  6. ultralajt

    UL SAILPLANE - Footlaunchable, foldable

    Okay guys, "long time no see"! There are some news, some are god and some not so good. In febuary this year I went to retirement. Now I have all time in the world for me, and I can do all day whatever I want. So I do things around my house (total renewation: new roof stucture, new roofing...
  7. ultralajt

    What aviation news, blogs or e-mail newsletters do you actively read?

    Ocasionally I visit this forum, othervise really dont read much on Internet, or when I did, I did not allow to have much influence on me, as I rely on my own large aviation books archive-collection, so I am pretty firm in my knowledge. Of course, i really enjoy looking on youtube all interesting...
  8. ultralajt

    Aeroplane you have to dress into !

    So, Speedboat100, you are former HBA member Topspeed?
  9. ultralajt

    The big video topic

    I did not mention any fibergalss! Fiberglass is for boats not for ultralight planes! I mention more of streamlining. It could be done lightweight by conventional wood/fabric construction by adding some balsa stringers reinforced with some carbon strips over slightly reshaped fuselage...
  10. ultralajt

    The big video topic

    I wonder, how much better would it soar if one bulid more streamlined fuselage with less sharp edges and cross section? ULF-1 Autotowing:
  11. ultralajt

    Tubular boom from sheet?

    Bowlus Baby Albatross Vintage Sailplane has a rolled aluminum sheet tail boom, with a vertical seam riveted on the top of it.
  12. ultralajt

    RC scale competition and full scale...

    Full scale rc ULF1: Full scale RC Elfe:
  13. ultralajt

    Shoulder wing unpopularity

    Out of production, but nice case of using glider wing sweept forward and side by side seats fuselage with engine in front. Othervise, it was TST-5 Czech wood construction.
  14. ultralajt

    The big video topic

    Never seen before a Hang Glider type A-frame for controlling a Gyro!
  15. ultralajt

    blanik L-13 glider, fowler flap

    Utopia from Bright Star Gliders Rigid wing uses retractable flaps for varying the wing area for slow or fast flight. Flaps were on inner part of the wing, while flaps were at the tip portion of the wing.. non-retractable. Wonder how they solve mechanical parts. This Glider is no more in...
  16. ultralajt

    blanik L-13 glider, fowler flap

    And moments ago I stumbled at this video with even more detailed shot: and another photo where a flap is visible in relation to the rest of the wing:
  17. ultralajt

    blanik L-13 glider, fowler flap

    I just found a video from a factory where Blanik gliders are under repairs. There is a time in video (at 1:14) where these slots are visible. I made a screen shot and a small portion cut out enlarged and it seems to me that it is like on my second sketch of this thread:
  18. ultralajt

    blanik L-13 glider, fowler flap

    Yes! But I wonder how to attach such a system in the dacron wing... Probably couple of let says foldable "reinforced carbon ribs" could incorporate the "slotted studs", while flap could be made as carbon/foam sandwich to resist bending and torsion loads.
  19. ultralajt

    blanik L-13 glider, fowler flap

    Wait! Maybe the slots were made different! Look at my sketch below. This is more like L13, as guide flaps most of the travel goes straight out little sloped down, and angled more down just at its very last portion of the movement.
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