View Full Version : Bell 206 tail rotor blades and power use?
Ok Ive been thinking about this for a while, if a bell 206 b2 has smaller tail rotor blades than a b3 does it use less, more or the same power through the tail rotor for the same load?
Or is the b3 able to put more power through its larger tail rotor.
BOBAKAT
28th Sep 2016, 07:34
depend the rotation speed ? ;)
Ascend Charlie
28th Sep 2016, 09:26
An efficient blade will produce the moment needed to counteract the torque by using less power than an inefficient blade. And a symmetrical blade is not particularly efficient.
For the same load it must produce the same thrust with less area so it could either operate at a higher AoA or spin faster - both will give more lift but also produce more drag.
From what has been posted before about Bell products and LTE - they should have just put a decent sized tail rotor on in the first place.
length of tail boom is a factor too
smaller disk means higher flow rate required for same thrust
and power required is a function of the product of flow rate and thrust
longer tail boom means less thrust required
longer tail boom means less thrust required
Dont the B2 and b3 have the same length tail boom
yes sorry i misread 'b3' as AS350B3, still true though