Thread: Build Log Pilot QB 10L electrified!
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Old Feb 15, 2013, 06:57 AM
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222 km/hr Parkjet flyer
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Latvia, Ventspils pilsēta, Ventspils
Joined Jan 2010
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Quote:
Originally Posted by ripplewave View Post
Alrighty! She is all dressed up and ready for the prom!

AUW is 20.5 oz or 690 grams. She came in under the specified weight range on the plan. The CG is just at the spar.
Very nice too !

Quote:
[As far as props go. I am going to build a thrust meter and do some more testing.
Far more use than watts per lb in my view ... Watts / lb as guideline ... thrust meter for actual. Then Pitch speed from RPM ...


Quote:
I do know for certain that it will not fly with a 7" prop or I should say, not fly well.

The motor is as stated in the test results post an 880 KV motor. If the battery is fully charged and for simplicity sake I have 12 V this means without a prop the motor RPM will be 10,560.
No wonder you want 9" prop !! 880kv motor ? I'm running an 1800kv ... much more suited to such a model IMHO.

I know I differ from some - but my idea is that low KV motors are more for slow-flyer jobs and not aerobatic / sport machines. With the QB10 series I would consider motors in the 1400kv and up range to keep more in line with original 10 FSR IC specs ...

Nigel
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