Category 8 - Aircraft - propeller

MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests

Last Updated 29 Oct 2026

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3 tables appear under this heading.

1. PDF page 409

Vertical Axis Broadband Random		Vertical Axis Sinusoidal Components		Longitudinal and Transverse Broadband Random
Frequency, Hz	ASD, g²/Hz	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)	Frequency, Hz	ASD, g²/Hz
10	0.0032	17 (R)	0.5	10	0.0022
30	0.0032	68 (nR)	2	40	0.0022
60	0.0002	136(2nR)	0.6	60	0.00015
150	0.0002	204 (3nR)	0.4	125	0.00015
300	0.0012	Overall rms, g	1.76	175	0.0005
400	0.0012			240	0.0009
500	0.0005			325	0.00022
725	0.0005			500	0.00022
800	0.00045			1000	0.00015
943	0.00045	Longitudinal and Transverse Sinusoidal Components		2000	0.00002
1061	0.00015	Longitudinal and Transverse Sinusoidal Components		rms, g	0.61
1450	0.00005	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)
1500	0.0001	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)
1575	0.0001	17 (R)	0.2
1610	0.00004	68 (nR)	0.5
1800	0.000025	136 (2nR)	0.2
2000	0.000025	204 (3nR)	0.1
rms, g	0.84	Overall rms, g	0.74
Test Duration per axis: 1 hour for 20 hours of flight.

Vertical Axis Broadband Random		Vertical Axis Sinusoidal Components		Longitudinal and Transverse Broadband Random
Frequency, Hz	ASD, g²/Hz	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)	Frequency, Hz	ASD, g²/Hz
10	0.006	102 (nR)	2.62	10	0.015
19	0.006	204 (2nR)	0.99	15	0.015
23	0.0008	306 (3nR)	1.25	25	0.0009
135	0.0008	408 (4nR)	1.03	111	0.0004
260	0.0065	510 (5nR)	0.54	162	0.0007
325	0.0065	Overall rms, g	3.97	250	0.0085
350	0.015			360	0.0003
570	0.0015			530	0.0006
720	0.004	Longitudinal and Transverse		930	0.0085
1000	0.0045	Sinusoidal Components		1070	0.015
1200	0.0025	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)	1300	0.0023
1500	0.015	Center Frequency, Hz (Blade Order)	Acceleration peak (gpk)	1680	0.0009
1600	0.01	102 (nR)	0.9	2000	0.0015
1700	0.006	204 (2nR)	0.42	rms, g	2.49
2000	0.0045	306 (3nR)	0.43
rms, g	3.22	408 (4nR)	0.25
		510 (5nR)	0.41
		Overall rms, g	2.63
Test Duration per axis: 1 hour for 20 hours of flight.

TRANSPORTATION LOCATIONS (see Figure 514.8C-14)	NARROWBAND LEVEL L₀ (g²/Hz)
In fuselage forward of propeller	0.035
In fuselage within one propeller blade radius of propeller passage plane	0.42
In fuselage or wing aft of propeller	0.11
1/ f₀ = blade passage frequency (propeller rpm times number of blades) (Hz). f₁ = 2 × f₀ f₂ = 3 × f₀ f₃ = 4 × f₀
2/ Test should be conducted as sine-on-random, with: S₀ = 1.414 * √0.1 * f₀ * L₀
3/ Sine tones may be swept to account for known variance in blade passing frequency.
4/ If transportation location is unknown test to highest S₀ level of the possible locations.
5/ Test duration per axis: 1 hour for 20 hours of flight.
6/ The broadband and narrowband levels were derived from previous versions of this standard by decompression from 1000 to 20 flight hours per hour runtime utilizing Equation 9.5 of Annex F with m = 7.5 (slope for acceleration spectral density).