Napkin sketches

Discussion in 'Hangar Flying' started by Autodidact, Mar 28, 2017.

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  1. Mar 28, 2017 #1

    Autodidact

    Autodidact

    Autodidact

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    I draw lots of "cartoons" or maybe they should be "planetoons", so I thought I'd start posting them. If anyone else wants to post up napkin sketches, please do.

    I like this configuration and I think it could work with a 1/2 VW or the big twin if it can be made light enough, perhaps with aluminum tube, some modelers may recognize this:

    Teddy.jpg
     
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  2. Mar 28, 2017 #2

    Autodidact

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    An updated Taylor Mono/KR-1 type airplane for bolted and riveted aluminum tube and VW power:

    Zentrener.jpg
     
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  3. Mar 28, 2017 #3

    Autodidact

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    A cross between a Chilton and a BA Swallow:

    trowsers1.jpg
    trowsers2.jpg
    trowsers3.jpg
     
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  4. Mar 28, 2017 #4

    Victor Bravo

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    OK, so now I'm really pi**ed off, because your napkin sketches are a LOT better drawings than my napkins... is there some kind of phone app or something that converts pencil napkin sketches to nice straight lines and non-wobbly curves?
     
  5. Mar 28, 2017 #5

    cluttonfred

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    Don't worry, VB, with age our vision gets blurrier so our sketches start to look better, at least to ourselves. :grin:

    Autodidact, I like the elegance of that first one a lot, but do you envision forward-swept wings? Otherwise the wing spar seems to pass through or just in front of the pilots torso.
     
  6. Mar 28, 2017 #6

    Autodidact

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    I use virtual napkins, much smoother and don't wrinkle up as you move the pen across them, and they have a built in straight edge!:gig: (they're not much help for when I spill the coffee, though...)

    It is pretty much copied from an RC model called "Teddy" that I saw on Outerzone, and I think it would have to have forward swept wings; I could put the spar (cross tube actually) just behind the pilots shoulders, but I don't like that for several reasons, so, yep.
     
    Last edited: Mar 28, 2017
  7. Mar 28, 2017 #7

    cluttonfred

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    With a shoulder-wing design like that it would be tempting to try an engine behind the cockpit like a Bell P-38 Airacobra, maybe a little Suzuki 3- or 4-cylinder driving a prop with a large spinner in the nose. That way you could move the pilot forward to clear the spar and gain great visibility and a jet-like look. I know torsional vibration is always the bane of such installations but it would be awfully cool if you could get it to work.

    PS--It would also be great for an all-electric design (electric motor in front, batteries in back) or a hybrid (electric motor in front, batteries and sustainer engine in back) in which the gas engine runs a generator to provide enough power for economical cruise plus a little more to recharge the batteries used for take-off and climb.
     
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  8. Mar 28, 2017 #8

    Autodidact

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    All good points. I actually thought about a poll to see how many people would be willing to fly with the engine (or battery pack) behind them. The RC pattern designs - especially the modern ones - have the cockpits forward because you don't have the restraints of reality to deal with, but I have often thought that the "cockpit forward" config would be how electric aircraft would end up looking, and the batteries could go in the wing roots and possibly even saddlebag style on the outside of the fuselage and they needn't look like add-ons either...
     
  9. Mar 28, 2017 #9

    Autodidact

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    What if Farman had designed and built a fighter in 1936-38? Could it have looked like this? Could its simple form and construction have yielded good performance? No compound curve other than the nose bowl and maybe the wing and tail tips..

    farmfighter.jpg
     
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  10. Mar 28, 2017 #10

    Twodeaddogs

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    have a look at the prewar Gloster single seater monoplane, or the unbuilt PZL monoplane, supposed to replace the PZL P11.
     
  11. Mar 28, 2017 #11

    Twodeaddogs

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    re the forward swept wing; the malmo MFI-9 and the Bo208 have a simple, elegant FSW that relies on a simple spar crossing behind the cockpit.
     
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  12. Mar 28, 2017 #12

    cluttonfred

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    Nah, that's too sleek for a Farman, my favorite Farman will always be the F.380 monowheel racer. The original set a class world speed record in 1933 of 303 kph/188 mph ***over a 200 km closed course*** on just 155 hp. What could Farman have done if given a Hispano-Suiza 12Y (as used in the MS.406, D.520 and a gazillion Soviet planes as the Klimov) and told to make a fast, cheap, easy to build fighter like an enlarged F.380? Sigh....

    fin_FARMAN_f-380.png f38010.jpg
     
  13. Mar 28, 2017 #13

    Autodidact

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    I knew that was too streamlined, how about this one:

    farmfighter2.jpg
     
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  14. Mar 28, 2017 #14

    Victor Bravo

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    (voice of Maxwell Smart) Ah-HA!... The old virtual napkin on the computer screen trick!

    The 115% size Chilton Monoplane - Miles Sparrowhawk sport racer is definitely on my list too.
     
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  15. Mar 28, 2017 #15

    cluttonfred

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    I think I liked the turtledeck version better.

    Twodeaddogs mentioned the prewar Bristol Type 146 and PZL P.50 JastrzÄ…b, to which I would add the Gloster F.5/34 and especially the Vickers Venom for something simple but striking. Radial engines all, but then the Verners make that more feasible than before.

    vickers_venom.jpg Vickers_Venom.jpg
     
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  16. Mar 28, 2017 #16

    Autodidact

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    That's one of my favorite planes; it's big and powerful, and it only has one seat so it's wasteful too!:beer:
     
  17. Mar 28, 2017 #17

    ScaleBirdsScott

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    I really like that Vickers Venom. First time seeing it but really cool look. Like a Zero and a Wildcat lovechild, but fabric covered? Wowza, talk about a light fighter.

    Edit: hmm looks like its monocoque aluminum all around, but the fuse is a faceted polygonal cone. Very simple, I like it.
     
    Last edited: Mar 29, 2017
  18. Mar 29, 2017 #18

    cluttonfred

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    Hehe, that about sums it up. The Venom was stillborn because the 500 hp Bristol Aquila never made it into full production and there weren't many other engines in that power range at that time. The Wasp Junior was close at 450 hp a little lighter but a little larger and the Twin Wasp Junior was about 50% heavier and more than 50% more powerful. Still, with the damage resistance of a radial it would have made a great little fighter and fighter-bomber for secondary theaters, but the Brits had other priorities back then.
     
  19. Mar 29, 2017 #19

    Twodeaddogs

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    also, the Caproni F5. Not many made, lost out to the MC 200 and Fiat G50.
     
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  20. Mar 29, 2017 #20

    Autodidact

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    Interesting wing planform:

    f5-1.jpg
     
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