English: To observe both limits VMO and MMO, the pilot of a jet
airplane needs both an airspeed indicator and a
Machmeter, each with appropriate red lines. In some
general aviation jet airplanes, these are combined into
a single instrument that contains a pair of concentric
indicators, one for the indicated airspeed and the other
for indicated Mach number. Each is provided with an
2007-02-04 03:41 Dhaluza 453×439× (361057 bytes) To observe both limits VMO and MMO, the pilot of a jet airplane needs both an airspeed indicator and a Machmeter, each with appropriate red lines. In some general aviation jet airplanes, these are combined into a single instrument that contains a pair of
{{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|To observe both limits VMO and MMO, the pilot of a jet airplane needs both an airspeed indicator and a