New idea in ducted fans

I'm thinking of a cone shape with vains. I'll have a chat with troels too

Have 2 sections, one with a main rotor, and a secondary tiny rotor in the aft cone to add more thrust and simulator real jet compression.

i've wondered about this concept myself... i'm keen to find out where this experimentation is going!

I am very interested in this EDF techno.
30 years ago I had built two Axiflo RK40 fans with two K&B 45, 7.5 cc special ducted fan monster power'full engine for a personnal
Me 262 ... too powerfull for the size of my design!!! more like a rocket .

But today , the new alloys fan and casing of Mercury EDF ( see HK page)seem to open a new age in EDF propulsion. With rpm up to 50 000, and metal rotor balanced in factory , the performance is climbing high.
I just bought the double outrunner HK 375 w. with two contra rotating props.I am just triming the props ( so awfuly unbalanced !!) to try driving more energy for thrust than now for vibes .

I think that the formula of a twin electric engine driving two contra rotating fans in the same tube , with a serious study to adapt the right shape of stators ,and the pitch of each rotor could bring some very interesting performance gain.
In the tube , the energy of contra rotation effect confined along the tube wall, helps taking advantage of the tangential speed recovery ,it should give its best! Better results than in free air.

   May be some study-board is already at work on this secret topic , and one day we will see the EDF , or TEF turbo electric fan, become smarter and more efficient than oil jet engines .(the noise of a
50 000 rpm fan is already like Mozart 'night music", less noizy than with a kerosen volcano inside )
Unless it displeases too much oil dealers!? I strongly believe there is something to do there.

What do you think of the idea ?

Edited by NOBLER2 - 02/Apr/2012 at 4:20am

It will work ur problem is fuel energy density...
the weight of the fuel will counter the extra power
if u included an ignigter system(from a bbq sparky lighter)
you could get a burst of flame and power until the fuel runs out :} HTH