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jake21
rrApprentice ontario canada 
Force Calculation. Can someone calculate what the load is on the blade grips when using 680 mm blades at 1800 rpm vs the load on 620 blades at 2100 rpm on a raptor 50 Titan. I would also like to know the formula. I know the weight of the blades makes a difference so let me know if possible what blades you are using in your calculation.
Thanks Kindly. Jake. 
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george0079
rrElite Veteran USA 
Uh oh.. Nope. It's ***ked!!! REKIT!!!!! 
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QuantumPSI
rrElite Veteran Atlanta, GA 
m = mass (kilograms) r = radius (meters) omega = angular velocity (radians per second)For the radius, measure from the center of the rotor head to the CENTER OF THE BLADE (or wherever the spanwise CG is, but if you don't know where that is exactly, half is not a bad estimate). This formula assumes the blades are point masses (which there clearly not). However, if the blades have uniform weight distribution (and they do for the most part), this approximation will get you pretty close.You should be able to calculate what you want from this (too sleepy to do the calculations myself, sorry) I will fly you forever... till earth do us part 
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tripergreenfeet
rrApprentice SA 

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heliguy
rrVeteran Boulder, CO 
1900 rpm = 395 lbf 2000 rpm = 438 lbf 2100 rpm = 483 lbfMy SAB 710s on my Fury at 175 gram and 18.25" comes out:1800 rpm = 647 lbf 1900 rpm = 721 lbf 2000 rpm = 799 lbf 2100 rpm = 881 lbfAl 
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