my motor has a 16,000 rpm what would the tip speed be with a dia. of 5 feet?
Think about it
Find the circumference.
Using a 5′ diameter, multiply the diameter times pi.
5′ * 3.141 = 15.708′
Divide 16000rpm by 60 to get rotation per seconds
266.667 rotations per second
Multiply by the circumference
266.667 * 15.708= 4188.805 feet per second speed at the tip.
This propeller is moving way too fast
Convert to mph
That’s 5280feet / 3600 seconds
4188.805 FPS / 1.467= 2855.354 miles per hour
This is well above supersonic speed so it probably won’t work.
This is a good equation for racing drones however, if you can keep the tips of the propellers from going supersonic, you can gain efficiency .try a 5″ propeller for a better result.
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