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Old Dec 11, 2007, 03:46 PM
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United States, NJ, Frenchtown
Joined Mar 2003
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Eliminate curved straightners AFTER the rotor ?

How much would I lose in static thrust, if I just put the GWS EDF rotors on the motor and use only a flat motor mounting plate ? Has anyone done this in real life and found a % gain or loss at different speeds.

I question how 1 fixed curved stator vane angle, could be efficient at all flow rates.

Rich
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Old Dec 11, 2007, 04:04 PM
A-4 nut!!
skyhawk's Avatar
Vancouver B.C.
Joined Apr 2002
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It's not, but it's a hell of a lot better than leaving it out.
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Old Dec 12, 2007, 10:36 AM
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Wichita, KS
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What the stators do is recover the swirl energy that would otherwise be thrown away. A rotating efflux does nothing for thrust, and the energy in the rotation is thrown away. On a propeller airplane swirl energy amounts to about 5% at low speed, less when faster. In a tractor propeller, the fuselage straightens the flow, but in a pusher swirl energy is thrown away.
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Old Dec 12, 2007, 07:57 PM
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United States, NJ, Frenchtown
Joined Mar 2003
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Thank you Mr. Brown.

In the GWS sized A-10's I have, the EDF 40's none rotating parts weigh a lot compared to less than 5% at WOT of the Hyperions 5800 KV thrusts. Plus I now have a Aluminum 100 % wrap around heatsink to release the heat with.
- 2 oz on a 17 oz plane is a big deal to me. It is now carrying 12 volts of 1100 mahr LIFEPO4 cell-B & D PVX cells. Thrust is 12 oz @ WOT.

Many, many thanks.

Rich
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