Farmboy
MEMBER
Middlebury, VT
Epiphany today after testing prop 3, a nice little 3 blade with no starting torque.
Prop #2 and 3 are plastic. I own a heat gun.
2 minutes later I had re-pitched prop #2 to a more drastic angle, per my welding bench and appropriate heat and pressure.
As originally thought, and as Pete reminded me, a greater pitch was needed to create more startup torque.
10 minutes later we got a spinner. No loads or output, but it cranks up, so second hurtle is overcome. We know it's possible with a small prop.
Video doesn't give a good visual due to frame rates, but the little bugger spins pretty good. Once output is tested further prop enhancements can be tested.
No load we have a 72 mph spin-up speed, and a <20 drop out speed. Didn't bother moving up into high speed testing now that it rotates.
Prop #2 and 3 are plastic. I own a heat gun.
2 minutes later I had re-pitched prop #2 to a more drastic angle, per my welding bench and appropriate heat and pressure.
As originally thought, and as Pete reminded me, a greater pitch was needed to create more startup torque.
10 minutes later we got a spinner. No loads or output, but it cranks up, so second hurtle is overcome. We know it's possible with a small prop.
Video doesn't give a good visual due to frame rates, but the little bugger spins pretty good. Once output is tested further prop enhancements can be tested.
No load we have a 72 mph spin-up speed, and a <20 drop out speed. Didn't bother moving up into high speed testing now that it rotates.