T&G Valkyrie (sort of a 3/4 scale Fi-156 Storch)

Discussion in 'Tube and Fabric' started by FritzW, Oct 22, 2019.

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  1. Oct 22, 2019 #1

    FritzW

    FritzW

    FritzW

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    This idea violates the simplicity rule for the T&G thread so I'll post it here.

    All the recent talk about tube and gusset got me spooled up a little so I dusted off an old idea for a scale(ish) Fieseler Fi-156. Originally it was going to be all wood but that make the bird cage a bit tricky (would have to transition to tube anyway) so I'm seeing how T&G would work out.

    The wing is already drawn up and ready for CNC. It's kind of neat, the spars get assembled into the ribs and it's all tab and slot. The LE slats are still TBD, maybe sheet metal, maybe composite. I posted a thread about it a long time ago. I'd post a link but our search function seems to be on the fritz.

    A Storch cowl shape will be ideal for holding a VW with a redrive. ...I still have to draw the cowl and redrive
    Valk 19 LO1.jpg


    Slats, flaps and off road gear. Perfect for my kind of flying.
    Valk 19 LO.jpg

    It would have a proper Fi-156 bird cage, great viability.
    Valk 19 LO2.jpg

    Doors on both sides, I'd fly it without doors 11 months out of the year.
    Here's a stereo image to make sense out of the tubes. It's a lot of tubes but the Tube-O-Matic would knock them out really quick.
    Valk19 Stereo.jpg
     
  2. Oct 22, 2019 #2

    Tiger Tim

    Tiger Tim

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    Well that’s just cool. Do you think that T&G’s drawbacks (gussets and fatter tubes vs. welded steel) will still allow for a nice, airy view out of all that glass?
     
  3. Oct 22, 2019 #3

    flywheel1935

    flywheel1935

    flywheel1935

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    Love the Cad drawings, and what your designing/building is exactly the type of aircraft I want
    Currently modding a LMA 2X here in the UK to achieve what your suggesting, high lift low speed and stol , good luck. IMG_1874.JPG IMG_1882.JPG
     
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  4. Oct 22, 2019 #4

    FritzW

    FritzW

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    A lot of the tubes in the bird cage would be pretty small, something like 3/8" x .035.


    Small tubes on bird cage (full scale Fi-156)
    Fi156.jpg
     
    Last edited: Oct 22, 2019
  5. Oct 22, 2019 #5

    flywheel1935

    flywheel1935

    flywheel1935

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    Hi FritzW, would you be willing to share your ideas/drawings ?
    My Mk2 LMA (UK) based design would be like a Single place Shock Cub, and your design is not far off that.
    have plenty of spare engines, Jabiru & Rotax . 20191021_114216.jpg 20191021_114216.jpg 20191021_114402.jpg
     
  6. Oct 23, 2019 #6

    FritzW

    FritzW

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    Your welcome to all my drawings but they're just concept sketches so far.
     
  7. Oct 23, 2019 #7

    FritzW

    FritzW

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    I played with the bird cage a little. I tried to let the software "auto-trim" the tubes, that didn't work very well so I'll go back and do it manually.


    I wouldn't even consider building something like this without a CNC tube profiler ...which I also messed with a little today.


    Valk Cabin.jpg
     
  8. Oct 23, 2019 #8

    Pops

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    Profiling the tubing is the easy part. Takes about 10-15 minutes per tube for 3/4" dia and under. Lot quicker than the welding.
     
  9. Oct 23, 2019 #9

    FritzW

    FritzW

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  10. Oct 23, 2019 #10

    Pops

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    Its called homebuilding. I enjoy most of it. The least thing I like about building an airplane is painting. I enjoy the fabric covering, but not so much the painting.
    But I grit my teeth and do it and after I'm done I get to enjoy the looks. We all are different.
     
  11. Oct 23, 2019 #11

    Bill-Higdon

    Bill-Higdon

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  12. Oct 23, 2019 #12

    flywheel1935

    flywheel1935

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    Hi FritzW, many thanks, Really like the wing design too, Actually off to my hangar this morning to start wing build
    of my LMA (USA) supplied kit, but parallel to the build will be sorting out MK2 LMA ( UK) design
    email is; alanhpierce@gmail.com
    see; www.bantamtrailers.co.uk
     
  13. Oct 23, 2019 #13

    Speedboat100

    Speedboat100

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    Don't show this to Mike Patey...he'd build it in an instant.
     
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  14. Oct 23, 2019 #14

    Winginitt

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    Storch diagram A.jpg View attachment 89713 Really like what you are doing as I have always felt the Storch was a remarkable design. I remember Pazmany commenting when he did the 3/4 scale replica that he had to make some allowances because the pilots wouldn't be 3/4 scale. Is your design derived from the original Fiesler or one of the later scaled copies available? Wouldn't a Corvair be a simplier engine choice than a VW with a redrive ? ;)
     
    Last edited: Oct 23, 2019
  15. Oct 23, 2019 #15

    Tiger Tim

    Tiger Tim

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    I bet the point is that the VW with redrive allows for a very scale narrow on top/wide at the bottom cowl without having to find a small, air-cooled inverted vee engine.
     
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  16. Oct 23, 2019 #16

    FritzW

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    I just started with a model of the pilot and the engine and sketched something that looked -sort of- like an Fi-156 around them. Like you mentioned, the Storch doesn't scale very well if you can't scale the pilot.


    It might be simpler but it wouldn't fit the cowl as well. A VW with a redrive is closer to the shape of the Argus inverted V8. Plus, swinging a longer prop would be a good thing for an airplane like this.
    Argus_As10_RAFM.JPG
    redeng.jpg
     
  17. Oct 23, 2019 #17

    Howard Allmon

    Howard Allmon

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  18. Oct 23, 2019 #18

    Howard Allmon

    Howard Allmon

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    Are you by chance in conversation with Jorge Gonzalez in South America ? or anything about CRIQUET ? For an engine you will need 125hp.
     
  19. Oct 23, 2019 #19

    Pops

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    A side note-- At one time Ernie Carlson of Carlson Aircraft designed and built a scaled down Storch and had an engine failure on takeoff in the test flying and got killed. Ernie and I started flying model airplanes together when we were both 15 years old.
    I had stopped by for a visit when the airplane was almost finished and it was a beautiful Storch. Had the inline Polish ? engine
     
  20. Oct 24, 2019 #20

    FritzW

    FritzW

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    No but I like what he's doing with brazed steel fuselages (non-4130 steel)
    Those Storks are much bigger than this one. A 2100cc VW with a PSRU would be plenty.
     

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