Ducted fan aircraft

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by jthunt, Mar 17, 2012.

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  1. Oct 28, 2019 #1601

    Erik Snyman

    Erik Snyman

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    Malish, Do you plan on selling copies of your drive set-up, or at least drawings so one can build or have it built, for himself?
    Regards,
    Erik in Oz.
    PS: I love the drawing of the little Sukhoi-like plane above....DCP_4950
     
  2. Oct 29, 2019 #1602

    REVAN

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    I like it too. But, I was wondering if trade studies showed that two fans were as good or better than a single fan, or if aesthetics was the main driver. Sometimes, things that seem intuitive at first glance are not true. Example, two fans can have more disk area for a given rpm and fan blade mach limit. So, while a single fan seems like it would be simpler and lighter, maybe 2 fans provides more thrust and better performance for the rotational speeds of the V8 engine being used.
     
  3. Oct 29, 2019 #1603

    Byuma Kahamba Elie

    Byuma Kahamba Elie

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    Avec deux ventilateur Je crois que le rendement sois meilleur.
    S'il vous plait est-il possible de m'envoyer plus d'explications sur tes idées ?
     
  4. Oct 30, 2019 #1604

    Malish

    Malish

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    I don't know French, but computer did translation for me.
    I think single fan without gearbox(direct drive) is better, then two fan with gearbox. But we did choose this trade-out, just because the look of aircraft.
     
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  5. Oct 30, 2019 #1605

    Malish

    Malish

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    No, everything will only sell is the kit of aircraft, because this fan drive system designed for this specific aircraft only.
    Sorry.
     
  6. Oct 30, 2019 #1606

    Malish

    Malish

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    Look at my answer to french guy, post # 1604
     
  7. Nov 6, 2019 #1607

    henryk

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  8. Nov 8, 2019 #1608

    xwing

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    More like ~ with 2 fans, i believe the redundancy is better, pls is it possible to send me the ideas with more explanations
     
  9. Nov 9, 2019 #1609

    Doggzilla

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    Judging by his user name he’s from one of the North African colonies.
     
  10. Nov 9, 2019 #1610

    henryk

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  11. Nov 9, 2019 #1611

    RSD

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  12. Nov 9, 2019 #1612

    henryk

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    -some link ?

    BTW=DREAMER Command in hard work (fly tests)...

     
  13. Nov 11, 2019 #1613

    henryk

    henryk

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    BTW=the strange low frequancy component of noise ?!
     
  14. Nov 11, 2019 #1614

    Malish

    Malish

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    This was noise of Cessna 172 worming up the engine next to our parking space! You see it taxi, after our aircraft stopped on the parking spot?
     
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  15. Nov 11, 2019 #1615

    henryk

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    =indeed, thanks !
     
  16. Dec 4, 2019 #1616

    Malish

    Malish

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    As I said before we're working to get better efficiency from our fan's. Samara Aviation University professor designed new fan for our airplane - it's has 6 blades(instead of 5) and they are about 20% wider. He said, that we should get 400 kg(880 lbs) trust from them - now we're getting 350 kg(770 lbs).
    thumbnail__8_.jpg
    thumbnail__5_.jpg
     
    Last edited: Dec 4, 2019
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  17. Dec 4, 2019 #1617

    henryk

    henryk

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    =good theory + Yours practis = THE BESTS results !

    +++ some many many many ...

    PS=


    (MITCHELLWING +Ducted Fan "extremely light unit (under 30 kilograms)."=70 kG/ 30 HP, 7000 RPM ...)
     
    Last edited: Dec 4, 2019
  18. Dec 4, 2019 #1618

    RSD

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    Thrust per fan, or for the two of them?
     
  19. Dec 4, 2019 #1619

    cluttonfred

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    A complete and proven ducted fan unit to suit a common paramotor engine like the VIttorazi Moster 185 would be very attractive for ultralight/microlight aircraft. I might even dust off that idea for a "profile scale" ultralight jet inspired by the general lines of the BAE Hawk.... ;-)
     
  20. Dec 4, 2019 #1620

    Malish

    Malish

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    I wish it would be per fan - 400 kg x 2 = 800 kg! Our airplane would climb like real fighter jet:)
     
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