Can anyone tell me why APC electric props have such a wide chord and reduced thickness cf the sport type props in the range ? Is there any reason to avoid the sport props for electric use ? (I know they don't recommend the E-props on ic engines).
Thanks,
On 10/27/2004 4:17 PM Ted shuffled out of his cave and grunted these great (and sometimes not so great) words of knowledge:
You can use sport props for electric, but not the other way around. The E props are thinned out to save weight. They are fine for electric, but will not hold up on a glow/gas engine.
Ted is correct...
The APC "Electric" props are designed to be more efficient at electric motor speeds, and do not have to be strong enough to absorb the "impulse" torque loads of a piston "impacting" them torisonally on each revolution...
..hence they can be designed for max efficency for producing thrust, not having to double as a shock absorber/flywheel as well...
The "standard" (sport) props work OK with the electric motors, but my tests here show a decrease in efficency in churning those (needlessly) thick blades through the air..
They recommend NOT using the electric props on a recriprocating engine....
Dave
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