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Thread: Witold Kasper

  1. #361
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    Re: Witold Kasper

    Quote Originally Posted by danmoser View Post

    SWIFT has 20 degrees of sweep, so the wing itself without winglets has more yaw stability than BKB-1 sailplane or Kasperwing ultralight, which both have 13 degrees... of course, winglets (tip rudders) add even more yaw stability.

    I have both foot launch & power cages with my SWIFT.

    it is ~60 pounds heavier with power unit (Konig 3 cylinder)
    Attachment 17018Attachment 17019
    -you want to modificate fins-rudders?\ KASPERwingg-like?\

  2. #362
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    Re: Witold Kasper

    Quote Originally Posted by henryk View Post
    -you want to modificate fins-rudders?\ KASPERwingg-like?\
    Not at first. I think stock configuration is OK.
    But maybe as a future experimental modification.
    I think drag rudders would improve turn response without adverse yaw.
    Similar designs Bright Star Millenium and Aeriane Swift'light both have moveable tip rudders inclined 30 degrees.
    Pilots report much easier turning than the Bright Star SWIFT, which has vertical winglets, no rudders.
    These rudders are not needed during take-off run.. that's where roll control with elevons is more important.

  3. #363
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    Re: Witold Kasper

    -very good=happy landings!

  4. #364
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    Re: Witold Kasper

    Just a suggestion -why not ask Ilan Kroo about his thoughts on any modifications and while at it his take on the "Kasperwing" (maybe we should give Brochoki his due actually as he is the prime designer --as Kroo was for the SWIFT. ) Like to hear what he has to say on vortex lift etc in this context..

  5. #365
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    Re: Witold Kasper

    Quote Originally Posted by Aircar View Post
    Just a suggestion -why not ask Ilan Kroo about his thoughts on any modifications and while at it his take on the "Kasperwing" (maybe we should give Brochoki his due actually as he is the prime designer --as Kroo was for the SWIFT. ) Like to hear what he has to say on vortex lift etc in this context..
    I have talked with Dr. Kroo about it years ago. He did create the SWIFT concept in collaboration with Dr. Steve Morris, and it was physically realized and produced by Brian Robbins & Eric Beckmann. Vortex lift is a well-known phenomenon that occurs in all swept wing aircraft at high angles of attack. The extremely high CL values (>10) reported by Kasper on the BKB-1 have never been confirmed by reliable measurements, and are almost certainly wild exaggerations.. yet "true believers" in the magic of BKB-1 vortex lift persist to this day. Not to knock Kasper's achievements, as I do think he invented some useful devices for control and stability, but Brochocki was definitely the main guy that created the remarkable BKB-1 sailplane design.
    Last edited by danmoser; April 13th, 2012 at 06:29 PM.

  6. #366
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    Re: Witold Kasper

    Quote Originally Posted by danmoser View Post
    He did create the SWIFT concept in collaboration with Dr. Steve Morris
    It's unusual to see that name twice in one day. Dr. Morris just moved into new office space and is apparently rather proud of it:
    --------.~.
    --------/V\
    ------//----\\
    -----/(------)\--Norm
    ----(^^)-(^^) "For some years I have been afflicted with the belief that flight is possible to man" ~Wilbur Wright 5/13/1900

  7. #367
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    Re: Witold Kasper

    KASPERFEST II on Vimeo

    =one of this KASPERWINGs have modyfied wingtips...

    any moore info?

  8. #368
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    Re: Witold Kasper

    Quote Originally Posted by rpm View Post
    That number might be exaggerated, comparing to parachute with rate of descent around 1000 fpm but obviously much larger canopy. Does anyone know true numbers? Is it, as @henryk said here "huge "vortex augmented lift" helping here?.

    So many questions - so little answers

    I am not sure how energy absorbing device @henryk was reporting previously could be used to minimize the impact.

    Can it be built light? Can it be adapted to Kasperwing trike?
    =absorber device for circa 100 kg mass=2kg, 1l volume...Witold Kasper-pasy-004.jpg

  9. #369
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    Re: Witold Kasper

    How does the absorber device work? Thanks

  10. #370
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    Re: Witold Kasper

    Quote Originally Posted by Tom Nalevanko View Post
    How does the absorber device work? Thanks
    Ekin.device=1/2 m*V^2 equal to Ekin.absorber\flywheel\=1/2 J*(omega)^2

  11. #371
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    Re: Witold Kasper

    So you have a linear rack which turns some gears which turn a flywheel?

  12. #372
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    Re: Witold Kasper

    Quote Originally Posted by Tom Nalevanko View Post
    So you have a linear rack which turns some gears which turn a flywheel?
    -yes,similar to the "INERTER" =
    J-Damper

    -moore finesse solution=
    Lotus Renault GP: Fluid Inerter | Scarbsf1's Blog

    =iff =Ekin device+ Ekin absorber=const =no inertia forces !
    Last edited by henryk; April 23rd, 2012 at 02:58 AM.

  13. #373
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    Re: Witold Kasper

    Thanks for the info; will read & be smarter!

  14. #374
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    Re: Witold Kasper

    Quote Originally Posted by Tom Nalevanko View Post
    Thanks for the info; will read & be smarter!
    -it is new directions=INERTER,KERS...
    but I know them from many,many years ago.

    Witold Kasper

    Witold Kasper-laborator-008.jpgWitold Kasper-laborator-010.jpg

  15. #375
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    Re: Witold Kasper

    Witold Kasper-tata-skan.jpg =night concurenz...Witold Kasper-bat-1-.jpgWitold Kasper-mckro-trike-008.jpg ="undercarrige" for OSCILLATING KASPERwing PROPULSION...
    Attached Thumbnails Attached Thumbnails Witold Kasper-wolf2.jpg  
    Last edited by henryk; May 30th, 2012 at 12:48 PM.

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