Downloaded from https://www.everyspec.com MIL-STD-81OD 19 July 1983 ;~ ‘I-3.7.1 ~ For wing mounted .-. equipment’,’ the test’levels”’for: Procedure I‘(Structural.Test) are”the.up and’T down levels as determined in.table 513.3-1, Plus’1.5 times NZs ,the additional load induced .byroll; where,1.5:is.a safety factor and -Nz is.computed as , follows. ,A, ,. ., .,, ., . . . . . AN2” = , :.Where::.d = = . . - lateral distance;of’equipmentfrom,aircraft CC.in meters ~-.,,. absolute value-,of maximum.roll acceleration.in rad/a2 (if” unknown, uae ~ = 20 rad/s2) ,. ... + 9.80 m/a2 .,;.,.... , ,. -.,:,,. .. ....’- II (Operational:Test), the test levels are the UD and down!levels .
as determined in table 513.3-II ‘plusA Nz. . ... ,,.. . .. .,., ,,, ,. ,, .......)...,..:..A 1-3.7:2. ~ lateral left.and.lat~ right For wing mounted”equipment’,the,test:levels for Procedure.I (Structural Teat),..are 6= :,.,.,, For Procedure the.lateral left and latera>’right levels as determined in table 513.3-I or 1.5, times A Ny, the.load induced by rOll, whichever is,,thehigher, where.1.5 is a ..- safety factor andA Ny is computed as follows. ; . ANY = g ,..., ,. :! r:,!,. . .:..! .: ,. Where: d. . ,$lateraldistanceOftequipment from aircraft CC in meters 0 = absolute value of maximum tiol1..velocity, rad/a (if-unknown, use ~ ~05m-=$/.a) ,., g=. ,.f I r . . For Procedu~e”II’‘(Operational.
Test),“”thetest..level;’ are’the iateril left ‘and‘it lateral right test levels aa determined in table 513-3-II or A Ny, whicheve! is the.higher,... ,. v. :.. ....’.. - ., ),.. ,. c, 1.,. 4.4+: ~. -, ,., -,. .,, . 1-3::.7.3~uver load. UD “anddown teat direcw . For fuselage mounted.equipment, the test levels for Procedure 1.(Structural Test).are the UP and down acceleration levels as determined in table 513.3-I Plus 1.5 times . ,. A,Nz, the additional 10ad induced by pitch change , where 1.5 is a safety factor and A Nz is computed aS fOllOws. >“!, . ..1 A NZP= + ; -- ?. ...G .: s... ,.. . ~ ,. .: ;- ,, ., .,. ,,. .... ,. -,. ....... ..,. ,,. , Where”: d . fore or aft distance of .equiprnent.
from,.CG.in meterg,. = maximum pitch acceleration fn rad/a2 (if.unknown, use ~ : 5 rad/s2) ,,i g = 9.8o m/a2) 1 .. ,,. , ,.,. ,- :,, ,. ! .,,.J,t.i. ., ,, ... ., For Procedure II (OperationalTest), the test.levels are the up and down levels as determined in table 513.3-11 plus A Nz. ‘MSTHOD513.3 513.3-7 19 July 19.83 .