Cheap & easy to build, cheap to fly

Discussion in 'General Experimental Aviation Questions' started by DeepB, Apr 12, 2019.

  1. Apr 15, 2019 at 6:02 AM #21

    lgrant2000

    lgrant2000

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    From Rutan Quickie - Wikipedia:
    Rutan was then involved with the design; Sheehan and Jewett suggesting a scaled-down Vari-Eze. After a preliminary pusher canard configuration design (Rutan Model 49) had been discarded, his solution to the design issues of low drag without retractable undercarriage and a workable center of gravity travel, was a tractor engine/tandem wing layout. Conversely to canard layout, the conventional front engine location put the pilot close to the center of gravity, a key point for a light aircraft. The wheels were incorporated into wingtip fairings without much drag penalty and the tandem layout gave safe stalling characteristics. Rutan produced the first drawings in May 1977 and thereafter the three of them worked on the design drawings over the next two months with construction beginning in August. After the first flights, Rutan spent more time with his Defiant design and other projects, and it was Jewett and Sheehan who continued development of the design and market it for home-build use. An agreement was reached that Rutan would fund the development and testing and once the design was complete they would pay Rutan back from future sales of the designs and kits.
     
  2. Apr 15, 2019 at 1:01 PM #22

    cluttonfred

    cluttonfred

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    If the OP is still looking for an aircraft to fit the German DULV 120 kg ultralight class, the key limits are the 120 kg/264 pounds empty weight and 55 kph/34 mph/30 kt stall speed. The standard European microlight class limits are 300 kg gross weight and 80 hp for a single-seater and 450 kg gross weight and 100 hp for a two-seater with both sizes limited to 65 kph/40 mph/35 kt stall speed. Any version of the Quickie is too "hot" in terms of minimum speed for either of those categories. A Quickie-like design could make for a great ultralight or microlight, but it would need quite a bit more wing area.
     
  3. Apr 15, 2019 at 2:47 PM #23

    Tiger Tim

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    A “Biggie” would probably get a fair bit of interest these days, I would think.
     
  4. Apr 15, 2019 at 3:21 PM #24

    cluttonfred

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  5. Apr 15, 2019 at 3:54 PM #25

    TFF

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    That is how fast you can make something unsexy.
     
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  6. Apr 15, 2019 at 6:00 PM #26

    cluttonfred

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    I don't know, I think it's cute. There are some good Mauboussin M.40 Hémiptère pics here, some better than I have ever seen before.

    http://www.airwar.ru/enc/law1/hemiptere.html

    Give it sexy Rutan shark fin raked rudders and wing tips, tricycle gear, and a canopy and you're in business. ;-)

     
  7. Apr 15, 2019 at 7:02 PM #27

    Victor Bravo

    Victor Bravo

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    My limited understanding is that the Quickie was not a wonderful flying airplane, with more than one issue. Very funky ground handling, etc. Other designs now provide equal performance with far better handling.
     
  8. Apr 15, 2019 at 7:36 PM #28

    blane.c

    blane.c

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    Ouch! ouch! ouch! ouch! ouch! ouch! ouch!
     
  9. Apr 15, 2019 at 8:01 PM #29

    Hot Wings

    Hot Wings

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    But basically true for the original QAC version. I'd have to challenge him to offer an example of "better performance" on the same REAL Hp but that is somewhat a matter of defining performance.

    Most of the problems of the original have had fixed found, and proven.
     
  10. Apr 15, 2019 at 8:25 PM #30

    Victor Bravo

    Victor Bravo

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    Fair enough, I will amend my comment to say "on the same class small block V-twin industrial engine" . The Luciole, the SD-1, and the little DA-11 were what I was thinking about. The Moni would also have done it, but was not fitted with the V-twin.
     
  11. Apr 15, 2019 at 11:27 PM #31

    Bill-Higdon

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    some one back in the 70's or 80's proposed a push pull airplane that looked like an updated M.40
     
  12. Apr 15, 2019 at 11:36 PM #32

    blane.c

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  13. Apr 15, 2019 at 11:55 PM #33

    blane.c

    blane.c

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    I was ouching this.


    OUCH.PNG
     
  14. Apr 16, 2019 at 5:49 AM #34

    FritzW

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    hemiptere-10.jpg

    + 30 years + fiberglass (ewww)

    =

    quickie01.jpg
     
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  15. Apr 17, 2019 at 1:06 AM #35

    pwood66889

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    Well, the prior is enough for me to give up the `coupe... :)
    Did see a Quicky take off once. It just did not angle up for fast ascent above the ground.
    Percy
     
  16. Apr 17, 2019 at 10:35 AM #36

    cluttonfred

    cluttonfred

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    Just for fun.... I have spared the faint of heart from the twin fin version with an abbreviated fuselage and tricycle gear. ;-)

    quickie 3-view.jpg biggie 3-view - corrected.jpg
     
    Last edited: Apr 17, 2019 at 11:30 AM
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  17. Apr 17, 2019 at 6:19 PM #37

    saini flyer

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    Make them identical hershey bar rectangular 8' span with 6" wingtip add on and use the Fritz 4" Al-tube as a backbone to mount the engine, wings, tail.....
     
  18. Apr 17, 2019 at 8:05 PM #38

    cdlwingnut

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  19. Apr 17, 2019 at 8:40 PM #39

    N804RV

    N804RV

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    Outside the "<120kg" category, I can suggest an aircraft that has been around since the late '60s, has a loyal following and is capable of 200kph+, mild aerobatics, has a stall speed of 89kph, climbs at better than 200/mps, all on less than 15l/hr of unleaded 0E petrol.

    I fly a Sonerai IIL. Max gross weight is 430kg. I'll bet a very nice one could be built for less than $30,000 US today. The trick to making this airplane perform well is to keep it light. Light weight is more important than a heavy flywheel, a starter, or a fancy avionics panel. I hand-prop it no problem, even warm starts. And, I use a little 5 watt handheld radio. --- Oh yeah, the wings do fold.

    [​IMG]
     
  20. Apr 17, 2019 at 9:04 PM #40

    blane.c

    blane.c

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    ZIPPY SPORT.PNG
     

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