fig1 and right rear rotor at point 182 will vary between 800 1000 pounds each these rear rotors should ideally be weighted within 10 15 of each other the best mode known at this time requires approximate 50 70 of this weight at the front rotor at point 181 fig1 in the best mode with all water tanks i e for optional sprayers not shown fuel tanks and hydraulic tanks full the observed weight at point 180 is 842 pounds the weight at point 182 is 948 pounds and the weight at point 181 fig1 at the front is 418 pounds turning now to fig1 an auxiliary hydraulic control unit 200 operates a plunger 202 that is interconnected to the fork 206 operating the rotor assembly thereshown the operation of the pitch control fork 206 has been explained previously in conjunction with my above referenced patents hydraulic control 200 is coupled to the fork through a suitable connection 207 a cable 210 connected to a plate 212 travels with the fork 206 in response to hydraulic actuation cable 210 leads to a blade pitch indicator not shown once hydraulic instructions have been conveyed to control 200 through the joy stick controllers 24 previously discussed the pitch of the various blades i e established by the position of the fork 207 can be selected referring to fig1 the preferred hydraulic circuit has previously been identified with reference numeral 220.