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  #31  
Old 03-23-2007, 10:37 AM
Phil Kriley Phil Kriley is offline
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Control-line speed racers use single-blade props. They are properly counter-balanced, very smooth, and very fast. They ARE more efficient, and the proof is that the racers would not go to the trouble to use them if they were not.
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  #32  
Old 03-23-2007, 03:02 PM
Leon Leon is offline
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ok, efficient may be, but GOD it looks like CRAP ! One blade ? forget it...
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  #33  
Old 03-23-2007, 04:43 PM
Phil Kriley Phil Kriley is offline
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Quote:
Originally Posted by Leon View Post
ok, efficient may be, but GOD it looks like CRAP ! One blade ? forget it...
I agree! It just looks WRONG!
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  #34  
Old 03-23-2007, 10:04 PM
Lynn Erickson Lynn Erickson is offline
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Quote:
Originally Posted by Phil Kriley View Post
Control-line speed racers use single-blade props. They are properly counter-balanced, very smooth, and very fast. They ARE more efficient, and the proof is that the racers would not go to the trouble to use them if they were not.
but they are turning at 10 to 20 times the RPM of a full size planes prop.
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  #35  
Old 03-23-2007, 11:21 PM
Don P-Factor Don P-Factor is offline
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Phil you can run a oil cooler duct forward and force feed it with a fan or mount your cooler in the nose to heat the cockpit. Don.
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  #36  
Old 03-25-2007, 05:55 PM
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Clutch Cargo Clutch Cargo is offline
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Wink Merflers..

Mufflers are used on blimps and such because they go slow enough that the exhaust noise can be the loudest sound (besides the props). In a tractor type aircraft, the noise is mainly from wind noise. Even on take-off the noise dampening from a muffler would benefit the on-lookers. The pusher is much more quiet in the cockpit (than tractor type).

Engine power pulses and other vibrations may have an effect on the structural integrity of the prop and drive train, but may be out of the audible range of human hearing. On the other hand, wind noise and other noise without detrimental effect can be quite annoying and can actually add to stress and fatigue (of the pilot). Noise cancelling headsets are much easier to deal with and are much lighter than mufflers, which are subject to metal fatigue, bad welds and faulty clamps.

No need to reinvent the wheel, it still rolls.
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  #37  
Old 03-27-2007, 03:29 PM
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neverquit neverquit is offline
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Anyone out there used any sound deadening material in their panels and such? Is it worth the trouble?
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  #38  
Old 04-19-2007, 11:10 AM
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Kevlar has sound deadening qualities that could be incorporated without much grief (other than it's a PIA to work with.) CF has a tendency to transmit noise
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