Owing to the low specific thrust, the bypass ratio for the engine is higher than normal for a military turbofan.
12.
Additionally a low specific thrust implies that the engine is relatively large in diameter, for the net thrust it produces.
13.
A high specific thrust usually results in higher noise levels, which is not an important consideration for most military applications.
14.
A high specific thrust engine has a high jet velocity by definition, as the following approximate equation for net thrust implies:
15.
Apart from developing training manpower and technical services for plastics industries, each centre has been entrusted with a specific thrust area for development.
16.
Low specific thrust engines tend to have a high bypass ratio, but this is also a function of the temperature of the turbine system.
17.
The Rolls-Royce / Snecma Olympus 593 in Concorde had a high specific thrust in supersonic cruise and at dry take-off power.
18.
Another application that could benefit from the VCE approach is combat aircraft . Designers normally have to make a compromise on specific thrust of the engine.
19.
If they choose a high specific thrust, the reheat specific fuel consumption ( SFC ) will be very good, but the dry SFC poor.
20.
The thrust lapse described above depends on the design specific thrust and, to a certain extent, on how the engine is rated with intake temperature.