Single Tube Fuselage idea

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by FritzW, Aug 11, 2016.

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  1. Aug 27, 2016 #201

    Hot Wings

    Hot Wings

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    Yes, but the down force is pretty small. Sin 8 degrees is only .139. So if you have 100 pounds of thrust there will be an additional 14 pounds of force the wing needs to lift. The forward thrust component is cos 8 deg = about .99. So you still have 99 pound of propulsive thrust to move you forward.
     
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  2. Aug 27, 2016 #202

    FritzW

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    Or... we could even split this thread into "Single Tube Fuselage idea" and "Flying Wing idea"

    If they gave Academy Awards for the best thread hijack... :gig:
     
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  3. Aug 27, 2016 #203

    Victor Bravo

    Victor Bravo

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    I didn't know that a tailless layout represented a hijack to this concept...

    But in the spirit of Fritz' comment: : "I'm so honored to receive tihs award... I'd like to thank the Producer Charles Fauvel at Ailes Volante Entertainment, our Director Jim Marske and everyone over at Pitch Damping Management, those rascals Al Backstrom and Paul MacCready at Plank Studios, and our editor JC Debreyer who brought this down to a manageable size. A special thanks to my agent Carl Goldberg and all the gang at VooDoo / Fox 35 agency, they've been with me since I was just a kid...."
     
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  4. Aug 29, 2016 #204

    erkki67

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    :roll::roll::gig::roll::gig::roll::gig:
     
  5. Aug 31, 2016 #205

    erkki67

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    a little bit less radical, a 3 tube fuselage?!
     
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  6. Oct 2, 2016 #206

    proppastie

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    Just discovered this thread, sorry I have been sort of busy, ....must be ESP anyway firming up my design. Decided to keep .120 wall except for at splice the 7075-t6 is bad for stress cracks. I took a hit in weight but saved money on machining and eliminated a tube. Aft tube is 6061-t6 x .049 wall. These tubes weigh 28 lb. Wheels (2) are 5 lb. About as far as I have gotten at this time.
    glider1.jpg
     
  7. Oct 9, 2018 #207

    erkki67

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    BDAC16D4-9A14-4A88-A8B4-36CC35BCF808.jpeg

    For sure an Affordaplane contender if built.

    It’s a bit more complex, due to the round tubing used and their bending.

    On the other hand, it gives a more homogeneous looking fuselage.

    For a slight better rigidity of the tail cone, a lower longeron could be added, like on the Dream Classic

    BC358AF3-5386-4427-9391-36D0E0FE333A.jpeg
     
  8. Oct 9, 2018 #208

    blane.c

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    When I saw the title of the thread I envisioned a tube the size of a culvert.
     
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  9. Oct 9, 2018 #209

    Sockmonkey

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    Sooo...
    [​IMG]
     
  10. Oct 9, 2018 #210

    blane.c

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    Pilot in front engine in back.
     
  11. Oct 9, 2018 #211

    BJC

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    It will be tough to transmit wing pitching moments through that strut arrangement.


    BJC
     
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  12. Oct 9, 2018 #212

    Sockmonkey

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    It's either free to pivot, or alternatively we can use a fixed elevator and control the wing tilt like they do on the flea. Whichever you think would work best.
     
  13. Oct 9, 2018 #213

    blane.c

    blane.c

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    Make front part of tube a Hull and have the pilot sit in the nose ahead of the spray. conventional controls.
     
  14. Oct 9, 2018 #214

    Sockmonkey

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    Well, for a seaplane I'd just do a pusher flea type design and use a pontoon float for the hull like so.
    [​IMG]
     
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  15. Oct 9, 2018 #215

    blane.c

    blane.c

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    That looks fun huh!
     
  16. Oct 9, 2018 #216

    blane.c

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    Lets see 254lbs plus 30lbs for the hull equals 284lbs. It might work huh? Sponsons? Could get another 20lbs gross and they probably wouldn't weigh that much.
     
  17. Oct 10, 2018 #217

    Sockmonkey

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    I know right? It's the perfect form for a seaplane. This would sell.
     
  18. Oct 10, 2018 #218

    blane.c

    blane.c

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  19. Oct 10, 2018 #219

    cluttonfred

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    Love the amphibious flea but why a pusher? At that scale nobody is climbing out over the bow, and putting the engine on the nose let's you use a longer prop and put the variable weigh the pilot closer to the CG. What about a Pouchel II engine wings and tail your hull above?

    Pouchelviabon.jpg
     
  20. Oct 10, 2018 #220

    blane.c

    blane.c

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    I like pusher better.
     

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