50 IMP2B 3U cPCI Single Board Computer
Publication No. IMP2B-0HH/5
A.3 Weight
The weight of the IMP2B (level 4/5) is approximately 280 g.
A.4 Reliability (MTBF)
The following table shows the predicted values for reliability as Mean Time Between
Failures (MTBF) and failures per million hours (fpmh).
Table
A-4 Reliability (MTBF)
Environment
Fail Rate
(Failures Per Million Hours)
MTBF
(Hours)
Ground benign 30
°
c
2.37666
420 758
Ground fixed 40
°
c
6.45114
155 011
Ground mobile 45
°
c
13.31882
75 082
Naval sheltered 40
°
c
10.98314
91 049
Naval unsheltered 45
°
c
20.33436
49 178
Airborne inhabited cargo 55
°
c
14.58733
68 553
Airborne inhabited fighter 55
°
c
18.52974
53 967
Airborne uninhabited cargo 70
°
c
27.58463
36 252
Airborne uninhabited fighter 70
°
c
40.27936
24 827
Airborne rotary wing 55
°
c
29.85988
33 490
Space flight 30
°
c
2.17541
459 684
Missile flight 45
°
c
35.67331
28 032
Missile launch 55
°
c
84.5206
11 831
The predictions are carried out using MIL-HDBK-217F Notices 1 and 2, parts count
method. To complement the 217 failure rates, some manufacturers’ data is included
where appropriate; πQ values have been modified according to industry practice.
These failure rates take no account of user-fitted PMCs.