MIL-PRF-27197E
airspeeds greater than 200 knots. he test shall be conducted at 80, 200, and 300 knots.
TABLE III. Mach number scale error tolerance
Pressure altitude
Tolerance
Inches Hg
Mach setting
IAS (knots)
(1000s of feet)
(± knots)
0
29.213
0.5
331
5
0
29.213
0.6*
397
5
0
29.213
0.9*
595
5
0
29.213
1.0
661
5
10
20.5770
0.5*
277
5
10
20.5770
0.7*
391
5
10
20.5770
1.1*
625
5
20
13.7500
0.7*
324
5
20
13.7500
1.2
579
5
20
13.7500
1.4*
675
5
30
8.8854
0.6*
223
5
30
8.8854
1.0
390
5
30
8.8854
1.6*
643
5
40
5.5380
0.7
209
5
40
5.5380
1.0*
313
3
40
5.5380
1.5*
493
5
50
3.4246
0.9*
219
5
50
3.4346
1.6*
425
5
60
2.1178
1.2
245
3
60
2.1178
1.7*
363
3
80
0.8099
1.8*
245
5
80
0.8099
2.0
274
5
TABLE IV. MAEAS scale error tolerance
Pressure
Ve = 600 knots
Ve = 700 knots
Ve = 800 knots
Tolerance
altitude
(1000s of
Mach
Mach
Mach
IAS
IAS
IAS
(± knots)
feet)
number
number
number
0
600
0.9077
700
1.0590
800*
1.2102
10
5
610
0.9951
713
1.1609
813
1.3268
10
10
622*
1.0945
726*
1.2770
826
1.4594
10
15
635*
1.2083
738*
1.4096
837*
1.6100
10
20
647
1.3390
749
1.5621
847
1.7853
10
25
658*
1.4900
758*
1.7384
---
---
10
30
667
1.6656
767*
1.9432
---
---
10
35
675*
1.8712
774*
2.1830
---
---
10
40
682*
2.1098
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10
13
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