Page 202 - The Jet Engine

Vertical/short take-off and landing

Fig. 18-8 Switch-In deflector system.

the used lubricating oil is ejected overboard, can be exhaust nozzle may be replaced by a multi-lobe
used. nozzle to increase the rate of mixing with the
surrounding air.
15. Lift engines can be designed to operate in the
vertical or horizontal position and a thrust deflecting 16. The lift-fan engine is designed to reduce the jet
nozzle fitted to provide some of the advantages of exhaust velocity, to reduce ground erosion and allow
thrust vectoring. Alternatively, the engine may be
mounted so that it can swivel through a large angle operation from unprepared ground surfaces. It also
to provide thrust vectoring. The lift-jet engine will reduces the jet noise significantly. A range of design
have an extremely hot, high velocity jet exhaust and options have been considered for this type of engine
to reduce ground erosion by the jet the normal and some are shown on fig. 18-11.

Fig. 18-9 Vectored thrust engine.

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