Black Box ME262C Betriebsanleitung PDF herunterladen (Seite 9)

Note: Electric fuel pumps are provided and can be used in cold

weather conditions when unit is hard to start. These pumps

supply gasoline to the burners. They should be shut off

when a speed of 3000 rpm is reached.

(3) Turn fuel selector valve "off".

(4) Throttles closed.

(5) Push down starter handle to prime Riedel starting motor.

(6) Pull starter handle and hold; at the same time press

tachometer button and hold. This puts tachometer in low

speed range.

(7) When jet unit has reached 700 to 800 rpm, press ignition

button on right side of throttle and hold. A deep throbbing

noise is heard as the unit begins firing. The speed

will increase to 1800 to 2000 rpm at this time.

(8) Release starter handle and tachometer button, open fuel

selector valve (rear tank position) and slowly advance

throttle to 3000 rpm.

(9) At 3000 rpm release throttle ignition button.

b. The jet unit is now running on the main fuel supply. Exhaust

temperature must not rise above 650°C.

If the jet unit fails to start, release throttle-ignition

button. The tail pipe should be wiped clean of any injected fuel

before repeating starting process. Otherwise a fire may start.

Whenever there is fire or smoke in the turbines, release starter

handle at once. Due to this fire hazard, a fire extinguisher

should always be ready.

WARM-UP AND GROUND TEST

(1) Trim stabilizer at 0° tp +1°. With full auxiliary

tank use +2° to +3°.

(2) Set left engine fuel selector valve on "front tank and

right engine fuel selector valve on "rear tank".

(3) Set flaps at 20°. Graduations are marked on upper surface

of flaps.

(4) Open throttles very slowly to 7000 or 8000 rpm. At this

speed the needle valve in the tail pipe should move to the

fully extended rearward position. This is visible from

the cockpit and indicates that maximum thrust is being

developed.

(5) Check exhaust temperature gage for not over 650°C.

(6) Check fuel pump pressure gages for 50 to 80 kg/cm2.

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Black Box ME262C Betriebsanleitung Seite 9