411 REFERENCE · Wiktionary
Mcrit
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
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en aviation The minimum en Mach number at which the en airflow over some part of an en aircraft reaches the en speed of sound.
en Aviation Maintenance Technician Handbook-Airframe Volume 2 FAA 2012 Many high performance aircraft are equipped with a Machmeter for monitoring Mcrit. The Machmeter is essentially an airspeed instrument that is calibrated in relation to Mach on the dial. https://books.google.com/books?id=SMrqAgAAQBAJ&lpg=SA10-PA25&dq=%22Machmeter%22&pg=SA10-PA25#v=onepage&q=%22Machmeter%22&f=false