Racket, let's talk turbine type

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Mike Everman
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Racket, let's talk turbine type

Post by Mike Everman » Tue Dec 20, 2005 7:10 am

I'm just contemplating that there's very little difference between an impulse turbine and a reaction turbine. I find it faascinating how a partial vacuum forms in preparation for the pulse, for obvious benefits.

I suppose the downside of the reaction turbine is skin drag in the duct, but not if its part of the duct. Just noodling. Maybe trying to justify a little easier path.

Easier to get high torque at lower rpm.
The ducts are blade spars, and heck, you could so easily do a single bladed prop. Bit of balancing, bit of sealing, all good fun!
Mike
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re: Racket, let's talk turbine type

Post by Mike Everman » Tue Dec 20, 2005 7:19 am

Something like this, but single bladed.
Image
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paul skinner
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Re: re: Racket, let's talk turbine type

Post by paul skinner » Tue Dec 20, 2005 12:21 pm

Mike Everman wrote:Something like this, but single bladed.
Image
I like it. But.

How the heck do you balance something so unstable acting as a rotor :)

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re: Racket, let's talk turbine type

Post by Mike Everman » Tue Dec 20, 2005 3:07 pm

Well actually, there'll be a joint back there before the spinny part, with a labyrinth face seal. Nothing too complicated about balancing a single bladed prop, but still some bearing heat issues I think I have an answer for. I want the CC stationary to start, but I'm working on configurations the use the spin in that area. Initially, I want to keep CC spin and tail spin seperate problems.
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re: Racket, let's talk turbine type

Post by larry cottrill » Tue Dec 20, 2005 3:30 pm

Though he never built a really successful pulsejet, the late great Dr Robert H Goddard had exactly this idea for aircraft propellers. He never tried it experimentally, though, as far as I can recall.

L Cottrill

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re: Racket, let's talk turbine type

Post by thecheat » Tue Dec 20, 2005 4:05 pm

just go one step further and bend the tail pipes into blade shapes like that one gluey I saw, then not only do you have the propulsion you also have the lift.
Lasers, jets, and helicopters HURAH!

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