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Speed-Gauge / Mach Indicators In Military Aircraft  
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Posted (7 years 3 months 3 weeks 6 days 9 hours ago) and read 3206 times:

I know commercial jetliners like the 707/DC-8/CV-880's speed-gauges often had problems with compressibility effects screwing up the airspeed readings.

During the time-period when supersonic fighters like the F-100, F-101, and F-102 began flying, did they have more reliable speed-gauges (IAS)?

Andrea Kent

1 replies: All unread, jump to last
 
User currently offlineRwessel From United States of America, joined Jan 2007, 2351 posts, RR: 2
Reply 1, posted (7 years 3 months 3 weeks 6 days 7 hours ago) and read 3187 times:
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Quoting Blackbird (Thread starter):
During the time-period when supersonic fighters like the F-100, F-101, and F-102 began flying, did they have more reliable speed-gauges (IAS)?

For supersonic aircraft, you usually have KEAS (Knot Equivilent Air Speed - basically calibrated airspeed with corrections for compressibility) instead of IAS, since a conventional pitot-type airspeed sensor is impossible much past M1.0. Usually you have an air impact pressure sensor facing the breeze, plus some way of sensing the static pressure (itself a problem for supersonic aircraft), and then some way to integrate the two values.

I don't know about the early Centuries, but this was certainly a non-issue by 1960.


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