Crossley Gas Engine

The engine tested was a Crossley Gas Engine, which when tested had a power output of 3.993kW in comparison to this a typical petrol engine would have an output of approximately 70kW and a tractor unit (used to pull an articulated lorry) would have an output 250kW. As can be seen this is a large difference in power output however many factors must be observed to see why this is the outcome. Such factors which effect this is that the Crossley gas engine is an old single cylinder engine which and a speed of 181 rpm, to compare this to the speed of a typical petrol engine, which is around 6000 rpm and a tractor unit (diesel, compression ignition engine) of 1700 rpm.
The Torque-speed characteristics of an engine are very important, this is because in an engine the higher the torque produced the higher the output of power, this can be seen as brake power is a function of torque (BP = Tč). This means that if at a low engine speed the torque is large, then the power output will also...