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Speed-Gauge / Mach Indicators In Military Aircraft

Blackbird From , joined Dec 1969, posts, RR:
Posted (5 years 12 months 1 day 17 hours ago) and read 2446 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

Rwessel From United States of America, joined Jan 2007, 1989 posts, RR: 2
Reply 1, posted (5 years 12 months 1 day 15 hours ago) and read 2427 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.