Ducted fan aircraft

[Erik Snyman]

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

 

[REVAN]

I like what you built.


BJC

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.

 

[Byuma Kahamba Elie]

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 ?

 

[Malish]

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 ?

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.

 

[Malish]

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?

No, everything will only sell is the kit of aircraft, because this fan drive system designed for this specific aircraft only.
Sorry.

 

[Malish]

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.

Look at my answer to french guy, post # 1604

 

[henryk]

http://cafe.foundation/blog/faradair-beha-an-electric-triplane-for-the-future/

=interesting ???

 

[xwing]

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.

More like ~ with 2 fans, i believe the redundancy is better, pls is it possible to send me the ideas with more explanations

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 ?

 

[Doggzilla]

Judging by his user name he’s from one of the North African colonies.

 

[henryk]

-any moore newes ???

 

[RSD]

-any moore newes ???

Last I saw on the www was that they were swapping out the BMW motorcycle engine for one of the new Rotax engines

 

[henryk]

Last I saw on the www was that they were swapping out the BMW motorcycle engine for one of the new Rotax engines

-some link ?

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

 

[henryk]

BTW=the strange low frequancy component of noise ?!

 

[Malish]

BTW=the strange low frequancy component of noise ?!

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?

 

[henryk]

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?

=indeed, thanks !

 

[Malish]

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).

 

[henryk]

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).
View attachment 90920
View attachment 90921

=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 ...)

 

[RSD]

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).

Thrust per fan, or for the two of them?

 

[cluttonfred]

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.... ;-)

 

[Malish]

Thrust per fan, or for the two of them?

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