First attempt at design for electric delta pusher

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by RCBinChicken, Jun 1, 2019.

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  1. Aug 24, 2019 #41

    Speedboat100

    Speedboat100

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    Johan...you rock ! Go for it.
     
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  2. Aug 24, 2019 #42

    henryk

    henryk

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  3. Aug 25, 2019 #43

    Speedboat100

    Speedboat100

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    Here is the Saab Draken video:
     
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  4. Aug 26, 2019 #44

    toyohabu

    toyohabu

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    like the idea, some similarity with one of my favorites the Rohr 2-175
     
  5. Sep 30, 2019 #45

    RCBinChicken

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    Your model does look gorgeous! I've built RC aircraft of a similar config and they flew well, although what is desirable in RC doesn't always translate to 1:1 scale so I can't comment on stability etc. :p I'm guessing by the smooth curves that this would be a composites bird?

    I wish... the Draken is my absolute favourite fighter and strong contender for my favourite aircraft ever, and a substantial part of the reason I love deltas so much. Love that video, have watched it umpteen times but can always go one more. :) But sadly I couldn't figure (yet) a good way to wrap the outward shape of the Draken around the physical constraints of a small, cheap, lightweight homebuilt: the sheer length of the airframe alone presents difficulties with CG (choose your poison: pilot at the front, horribly nose-heavy OR pilot further back, severe visibility issues) and for every bad thing I hear about drag of low-speed, low-aspect-ratio wings, the Draken would be even worse with its ultra-narrow span.

    But that said, I hate to give up on something even if (hell, ESPECIALLY if) it's outwardly a bad idea - though I imagine the experienced hands here will wince at that sentiment, and I don't blame them - and although I'm not a big fan of the F-22, I'm impressed with what the Archon SF-1 guys accomplished in a similar vein. So I'll keep plugging away with my sketches, and if things do take a Draken-ward turn one day, I'll be very happy. The thought of seeing THAT shape waiting by a runway and knowing it's mine and I can go fly in it... without needing a few million bucks... it's a heady thought!
     
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  6. Sep 30, 2019 #46

    Johan Fleischer

    Johan Fleischer

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    [QUOTE :p I'm guessing by the smooth curves that this would be a composites bird?
    -Yes composites :) I am in the process of moving to another 3D app, in order to get more precise results. It's a steep learning curve, but I will definitely upload new pictures.
     
  7. Sep 30, 2019 #47

    Bille Floyd

    Bille Floyd

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    Off topic here ; i'll get back On in a moment :

    From 1980 to 1990 , i sold Hang glider 'Rides" for a living
    over the cliffs of Torrey Pines , norh of San Diego ; was a
    LOT of Fun, (but didn't do Squat , for my work ethic) !!
    Sold about 3500 rides .

    On your delta wing :
    I highly recommend you build a scale model , and fly it
    RC first ; make it a BIG model , or the Reynolds numbers
    will be so different, that Ya won't get good data to scale
    it up.

    Bille
     
  8. Sep 30, 2019 #48

    pictsidhe

    pictsidhe

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    Unfortunately, an electric Draken won't work with current technology. It would be a huge challenge with a conventional engine. Have a look at Malish's PJ-II Dreamer in the ducted fan thread for the best example yet of how to build a pseudo-jet while using a reasonable AR and getting decent performance.
    I'd love an English Electric Lightning. But, it just won't work as a homebuilt. I'm 'making do' with a WWII fighter, instead.
     

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