CS 22.583  Winch-launching

CAA ORS9 Decision No. 1

(a) The sailplane must be initially assumed to be in level flight at speed V_W with a cable load acting at the launching hook in a forward and downward direction at an angle ranging from 0° to 75° with the horizontal. 

(b) The cable load must be determined as the lesser of the following two values: 

(1) 1.2 Q_nom as defined in CS 22.581(b), or 

(2) the loads at which equilibrium is achieved, with either:  (i)     the elevator fully deflected in upward direction, or  (ii)     the wing at its maximum lift. 

A horizontal inertia force may be assumed to complete the equilibrium of horizontal forces. 

(c) In the conditions of CS 22.583(a), a sudden increase of the cable load to the value of 1.2 Q_nom as defined in CS 22.581(b), is assumed. The resulting incremental loads must be balanced by linear and rotational inertia forces.