"PERPENDICULAR VECTOR ADDITION. * │ * original │ * new heading direction │ psi * at VGROUND and angle psi at VPLANE │ * │ │ * V │____________* cross wind -> VWIND (c) Copyright PCSCC, Inc., 1993 The plane is originally heading 'down' at an airspeed of VPLANE which equals its ground speed VGROUND. When it meets the crosswind, blowing from left to right at speed VWIND, the plane's new ground speed is VGROUND and its new heading is angle PSI with respect to the original direction. To solve this problem, move the blinking cursor to variable VPLANE and set this variable to 500 by typing 500 (enter). Next move to variable VWIND and set its value to 300. The new groundspeed is VGROUND=583.1 and the relative heading is PSI=30.96degrees. Type any key to exit. ||An airplane is flying at 500 mi/h into a crosswind of 300 mi/h. (a) What is the planes airspeed relative to the ground? (b) In what direction should the plane head relative to its original ground direction so as to maintain its original direction with respect to the ground? Type comma key to see answers. Type (F2) to return to helpfile."
