синхронізатор шестерень четвертої та п'ятої передач
synchronizer
4GW (fourth-generation warfare)
direct fourth
fifth wheel (FW)
fifth columnist
fifth column
fifth echelon maintenance
supersonic speed (exceeds speed of sound / Mach 1)
variable-speed with speed control
instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)
cruise speed / cruising speed
Nr gauge (Nr = speed of rotation) / rotor speed sensor
gear speed decreaser
idler direct speed gear
direct speed gear
landing gear placard speed
third-speed gear
camshaft gear (timing gear)
gear reduction unit / gear-reduction unit
observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)
course and speed calculator
wind speed and direction
hovering and low-speed indicator
fuselage and landing gear clearance zone
apparent speed
average speed
blade speed
convoy speed
critical speed
cross-country speed
endurance speed
exhaust speed