A Mathematical Model of a Single Main Rotor Helicopter for ... - Read
A Mathematical Model of a Single Main Rotor Helicopter for ... - Read
A Mathematical Model of a Single Main Rotor Helicopter for ... - Read
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(-&<br />
Q = nb pacR2 (RR) [l + (1 - - (eo - Klao) [$ + (5 - ') 4<br />
H<br />
Q + '(') 6 Q<br />
- 4<br />
- K 1a 1 ) [(i - i) (> + b,)<br />
u bl PH qH<br />
- - a. + - (1 - E2)p2 + + (- - sin 6 + - cos .)1<br />
6 16 R w n<br />
For the case <strong>of</strong> a two-bladed teetering rotor, the <strong>for</strong>ces and moments can be<br />
..<br />
obtained by setting E = 0, io = a. = 0 in the above equations.<br />
The rotor pr<strong>of</strong>ile drag coefficient 6 is required in the computation <strong>of</strong> Hw and<br />
Q. An expression <strong>for</strong> this coefficient was employed which provides a reasonable match<br />
with measured section characteristics as follows:<br />
6 = 0.009 + 0.3 (2s<br />
20<br />
.<br />
:<br />
-e<br />
.
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