p.  
‘Rated output’ means the approved shaft power or compressed air output or both, that is developed statically at standard sea-level atmospheric conditions for unrestricted periods of use.

q.  
‘Rated temperature’ means the maximum turbine inlet or exhaust gas temperature at which the engine can operate at rated output and speed.

r.  
‘Rotor’ means a rotating component or assembly including blades with the exception of accessory drive shafts and gears.

s.  
‘Start’ means an acceleration from the initiation of operation or starter torque to a stabilised speed and temperature in the governed ranges without exceeding approved limits.

t.  
‘Substantiate’ means to prove by presentation of adequate evidence obtained by demonstration or analysis or both.

u.  
‘Type’ means all of a series of units each one of which was developed as an alternative configuration or refinement of the same basic unit.

‘Auxiliary rotor’ means a rotor that principally serves to counteract the effect of the main rotor torque
on a rotorcraft and/or to manoeuvre the rotorcraft about one or more of its three principle axes.
‘Beta Control’ means a system whereby the propeller can be operated at blade angles directly selected by the air crew, or by other means, and normally used during the approach and ground handling.
‘Boost Pressure’ (piston engines) means the manifold pressure measured relative to standard sea-level atmospheric pressure.  
*‘Brake Horsepower’ means the power delivered at the propeller shaft (main drive or main output) of an aircraft engine. 
*‘Calibrated airspeed’ means indicated airspeed of an aircraft, corrected for position and instrument error. Calibrated airspeed is equal to true airspeed in standard atmosphere at sea level.