Low wing pusher configuration?

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by BBerson, Nov 20, 2016.

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  1. Nov 20, 2016 #1

    BBerson

    BBerson

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    Can anyone provide an example of "low wing pusher" airplane or ultralight? About all I have found is the Taylor Coot Amphibian and Osprey seaplane and a few motorgliders. I searched a book of 700 designs. What else is out there?
    Note: I am only interested in engine/prop above the wing configuration, not the BD-5 types with the prop in the tail.

    Also, does anyone have flight experience with "low wing pusher"?

    p.s. The Coot and Osprey could be called mid wing, I suppose, except that the Coot wing roots actually sits in the water when floating. And the wing is entirely below the prop arc, so I call it low wing. Where most other pushers are called high wing with the wing near the thrust line.
     
    Last edited: Nov 20, 2016
  2. Nov 20, 2016 #2

    BBerson

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    The Aerosport Rail is another example of wing below the engine and prop (engines, in this case). But I was seeking some more refined designs.
    image.jpeg
     
  3. Nov 20, 2016 #3

    wsimpso1

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    Vari Viggen by Burt Rutan.
     
  4. Nov 20, 2016 #4

    BBerson

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  5. Nov 20, 2016 #5

    BBerson

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    Yep, that's a low wing pusher alright. My design is conventional tail however, so may not apply.
    But if anyone has Vari Viggen flight experience and can comment about the effect of the high thrust line above the wing, if any, I would be interested
     
  6. Nov 20, 2016 #6

    bmcj

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  7. Nov 20, 2016 #7

    BBerson

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  8. Nov 20, 2016 #8

    FritzW

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    Janowski has a few that are more or less low wingers...

    J2_SA40.jpg J5_oshkosh.jpg zj3_4.jpg
     
    Last edited: Nov 20, 2016
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  9. Nov 20, 2016 #9

    CameronB

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    Cirrus vk-30?
     
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  10. Nov 20, 2016 #10

    BBerson

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  11. Nov 20, 2016 #11

    BBerson

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    More conventional?
     
  12. Nov 20, 2016 #12

    BBerson

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  13. Nov 20, 2016 #13

    cluttonfred

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    There was a single VW engine variant of the Aerosport Rail.

    IMG_0263.JPG

    Otherwise, I think you'll have more luck searching for twin-boom light aircraft and picking out the low-wing ones from the results. Here is the old Arpin A-1 (two versions) and the modern Vulcan Ion 100:

    IMG_0267.jpg IMG_0270.JPG

    800px-IONAircraftIon.jpg

    You might also look to some very light jets for inspiration. While more of a mid-wing, SIPA S.200 Minijet is a favorite, and it's not hard to imagine the pod mounted a little higher and sweeping up to a prop instead of down to a het exhaust.

    sipa200n917wj.jpg
     
  14. Nov 20, 2016 #14

    BBerson

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    Twin boom just won't work for me. I want the single boom under the prop and the wing under the prop to shield from rocks.
    Or if a seaplane version, to keep water out of prop.
     
  15. Nov 20, 2016 #15

    TFF

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    Although a shoulder wing, the Lake Amphibians have a high thrust line. Pireps for them should be pretty easy to find. A tractor, the Seawind has essentially the same high thrust, too.
     
  16. Nov 20, 2016 #16

    BBerson

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    Yeah, the Lake Amphibian is what I was looking at. But move the wing lower and make the tail boom lower so the prop arc can be partly lower than the cockpit, much like the original early prototype called Tadpole:
    image.jpeg

    image.jpg
     
    Last edited: Nov 20, 2016
  17. Nov 20, 2016 #17

    Himat

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    Last edited: Nov 20, 2016
  18. Nov 20, 2016 #18

    Battler Britton

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  19. Nov 20, 2016 #19

    Aerowerx

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    I know it says J-3, but that looks like a J-2 to me. Hold on a second....

    ....just looked up both of them. There is not much difference, but I see that the J-3 has the engine mounted higher.

    As far as I know, there are no plans available for the J-3, and the J-2 plans are poor quality scanned-in copies, and in Polish only.

    My build, as I have mentioned, is a J-1B but with a T-tail like the J-2.
     
  20. Nov 20, 2016 #20

    Himat

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    Only as radio controlled models, like this one:
    MULTIPLEX-EasyStar-II-RR-1360mm-PNP-015264260_b_3.JPG

    Ok this is maybe a shoulder wing airplane if following the definition strictly.

    Anyway, this and all copies/knock offs have one flight characteristic that a full size would have too. Pitch down on application of power, pitch up as power is decreased. How pronounced this vary a lot between how well the design have been done.

    The Multiplex “original” is quite benign, with very little pitch up/down reaction as power input is changed. Some of the knock offs are on the border of vicious pitch changing with power change
     

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