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Originally Posted by Deathblow
My guess is that the stators are probably made of steel whereas traditional props are probably titanium.
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Normal screws are made of bronze.The impellors???? no idea..
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There has to be some tangible advantage to them since everyone is making the switch now. My reading says that a pumpjet can achieve an equal amount of thrust with a smaller diameter than a traditional screw, something about better use of the blade ends for thrust production iirc.
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The noise of the screw turning is more 'channeled' in a fore and aft direction. With the impellor housing you get a baffling effect and that cuts down on your side aspect noise level. One other thing is blade count. What IS the number of impellor blades and how does something like DEMON interprept this into a TPK.