Downloaded from https://www.everyspec.com MIL-STD-810C Unknown Unknown Select most probable level from those given in forward acceleration column of appropriate category, and use largest given multiplying factor to attain test level for all directions. 3.2.1 The test levels for table 513.2-1 and table 513.2-11 are based on accelerationsat the C.G. (center of gravity) of the vehicle. For fighter aircraft, these G 1evels must be increased for equipment locations away from the C.G. to account for maneuver loads, including the effects of roll and pitch motions. a. For the UD and down directions.the increase’shall be as follows for Wing locations:
A G, = d(ar), where A Gr = Additional acceleration due to roll g d= lateral distance from C.G. in feet ., @ . 2 maximum rol1 acceleration, radians/see (Use ar = 15 unless otherwise known) g= 32.17 ft/sec2 Add the A Gr value obtained above to the table 513.2-II accelerationvalue for the operational test acceleration level. For the structural test level, multiply the new operational test value by 1.5 if this prOvides a value larger than table 513.2-I. b. For lateral directions, the.G level shall be determined as fO1lOws fOT wing locations:
Gcr = du2, where Gcr = centrifugal acceleration due to roll T U = maximum roll velocity, radians/see (Use u = 5 Unless,otherwiseknown) d= lateral distance from C.G. in feet !4= 32.17 ft/sec2 Use the Gcr level obtained when the comrsuted value is above for the operational test acceleration level lars?erthan that in table 513.2-11. For the structural t~st level, multipl~ the new operational test value by 1.5 if this provides a value larger than table 513.2-I. METHOD 513.2 513.2-6