Rover 60 Operations Instructions download pdf (Page 31)

4.2 Experiment Preparation/Startup

Following steps should be carried out to prepare for the experiment:

• Ensure that the fuel drain assembly (See figure 7) is not faulty and

that the apparatus is not inclined upwards at the exhaust end, so that

complete fuel drainage is not impaired. If fuel drainage is affected,

then there is a possibility of engine over speeding at start-up due to a

large amount of residual fuel accumulation in the combustion

chamber or main air casing. Fuel may be present after a failed engine

start-up. The fuel might also accumulate due to a slight leak at the fuel

burner. This accumulated fuel produces an over rich air/fuel mixture

during the engine start-up period. Dangerous conditions can result if

the amount of accumulated fuel is excessive. The engine might

accelerate to an unduly high speed and temperature at start-up. Before

starting the apparatus, unscrew the fuel drain valve and replace it after

all the fuel in the main air casing has drained. A defective fuel drain

assembly should be rectified and replaced immediately.

• Ensure that the engine is free of load (check that the dynamometer

hand wheel is closed). The engine should not be started with a load

already applied to it.

• Ensure that the main fuel supply valve (see figure 20) is open and that

the fuel pump is switched on and is actively pumping fuel to the fuel

tank, located at the top of the apparatus. The apparatus fuel tank

should be full before commencing the experiment.

• Turn on the fuel control knob on the control desk so that the fuel

measuring flask is full of fuel. Then shut-off the fuel supply by

turning the fuel control knob to off.

• Unscrew the fuel accumulator a few turns to release already

accumulated fuel and allow air to enter the accumulator bulb. Then

screw the fuel accumulator down until it is finger tight.

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 43 44

No comments

Rover 60 Operations Instructions Page 31