overheat /，.υv.'hi:t / verb to get too hot 0 An acceleration/deceleration con-trol is fitted to prevent the turbine assembly from overheating during acceleration, and to prevent flame-out during deceleration.
overlap noun /'.υv.l.p/ part of one thing covering something else _ verb /，.υv.'l.p / to have an area or range in
with something else, or to cover part of something else 0 The maps overlap each other at the edges by three centimetres. (NOTE: overlapping – overlapped) overload noun /'.υv.l.υd/ an exces-sive amount of work or electricity 0 Resettable circuit protective devices should be designed so that when an overload or circuit fault exists, they will open the circuit. _ verb /，.υv.'l.υd / 1.
overload operations 166
to load a device or system, such as an electrical circuit, with too much work; to demand more than a system is capa-ble of . Operating pressure is main-tained in that part of the system which leads to the selector valves, and some method is used to prevent overloading the pumps. 2. to load too heavily . The aircraft failed to gain height after take-off because it was overloaded.
overload operations /.υv.l.υd
.p.re..(.)nz/ noun operation of air-craft in unusual situations when take-off weight exceeds the permitted maxi-mum
override /.υv.ra.d/ verb to take over control of the operation of an auto-matic device or system . A circuit-pro-tective device must not be of a type which can be overridden manually.
(NOTE: overriding – overrode – over-
ridden) overrun /.υv.rn/ noun a cleared level area at the end of a runway, avail-able in case a plane does not stop quickly enough
overshoot /.υv..ut/ verb to fly past a target . The pilot tried to land but the aircraft overshot the runway. (NOTE: overshooting – overshot)
overspeed verb /.υv.spid/ to go too fast . A fault in the constant speed drive unit causes the generator to over-speed. . noun /.υv.spid/ a speed that is too fast . Overspeed is usually a fault in the constant speed drive unit which causes the generator to overspeed.
overspeeding /.υv.spid../ noun
the act of going too fast . Overspeeding of the engine is prevented by a governor in the fuel system.
overstress /.υv.stres/ verb to sub-ject to too much force . It takes less g force to overstress a heavy aircraft than a light one.
owing to /.υ.. tu/ preposition
because of . Integral tanks are now favoured for aircraft owing to the very high utilisation of space and saving of weight. . Owing to the aerodrome being unserviceable, the landing was made at another aerodrome some distance away.
oxidation /.ks.de..(.)n/ noun the combination of a substance with oxy-gen, with loss of electrons . When alu-minium surfaces are exposed to the atmosphere, a thin invisible oxide skin forms immediately that protects the metal from further oxidation.
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