Downloaded from https://www.everyspec.com MIL-STD-81OD 19 “July1983 NOTES 1. Raise computed Lo level by 3 dR for a store carried in a TER cluster rack; by 6 dB for a PIERcluster rack. 2. If calculated f. ia above 2,000 Hz use upper ‘frequencylimit of 2,000 Hz. If calculated f. is below 200 Hz uae 200 Hz. 3. Round off f. upwards to a one-third octave band center frequency. ~ 4. For stores which do not have circular cross-sections the radius used in the formulas shall be the radius of the oirole which circumscribes the ,- cross-section of the store. I 5. For locations on flat nose storea (800 B 90° ) where X 100:
Functional teat *- Lo = 20 Log (q;) -6 Log(X) +E+H Endurance test Lo = 20 Log (q2) - 6 Log (X) +E + 2.5 Log (N/3T) + H 6. For long cylindrical section, > 2b, use for locationa more than one D aftward into the cylindrical section: Functional teat 0 Lo=20L08(ql)+F+H Endurance teat Lo = 20 Log (q2) + F + 2.5 Los (N/3T) + H 7. For changing radius section either aft of a long cylindrical section or when X > 100 on a flat nose store, redefine X so that X = 1 at beginning of this section: Functional test Lo = 20 LOS (ql) + llLog(X)+F+H Endurance teat ., Lo = 20 Log (q2) + 11 Log (X) + F + 2.5 Log (N/3T) + H ~. METHOD 515.3 19 July 1983 515 . 3 - 10 .