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Thread: Westfall negative stagger biplane

  1. #1

    Join Date
    Nov 2017
    Posts
    6

    Westfall negative stagger biplane

    I discovered Westfall negative stagger biplane in Sport Aviation of october
    and found that this cabin biplane was great, I couldn't resist to draw a
    microlight-LSA variant with a VW 2180 70HP engine
    I took same dimension gap 46" and chord 42".
    Here are some thoughts concerning the biplane with positive and negative
    loads.

    flying wires
    https://drive.google.com/file/d/15HS...ew?usp=sharing

    landing wires
    https://drive.google.com/file/d/1qHR...ew?usp=sharing

    some specs
    https://docs.google.com/spreadsheets...it?usp=sharing

    munk factor
    https://drive.google.com/file/d/1UzD...ew?usp=sharing

    50 ft clearance
    https://drive.google.com/file/d/1baw...ew?usp=sharing

    Take Off ground roll
    https://docs.google.com/spreadsheets...it?usp=sharing
    Figures could be divided by 2 with a reducted Rotax engine. Static thrust of VW2180 76HP
    is given by Great Plains builder manual 225lbf that is quite anemic.

    Upper spar of cabin to support wing rear upper spar (cantilever)
    https://drive.google.com/file/d/1JlO...ew?usp=sharing

    Upper spar with fixed end moments
    https://drive.google.com/file/d/1BrR...ew?usp=sharing

    Name:  side 5.jpg
Views: 62
Size:  40.9 KB

    P.S : I use english and french, but in the latter case I think that drawing would help even if you don't know french.
    Last edited by JLS; 10-12-2019 at 04:04 PM.

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