User manual

DodoSim 206 FSX User Manual

Page 62

25. Open the throttle slowly and smoothly until combustion commences.

Important note: This can most easily be accomplished when not using a joystick axis to

control the throttle by left-clicking in area A in the throttle window.

See the previous section “Cockpit Buttons and Switches – The Collective Head” for more

information on throttle use and mouse throttle control.

26. Monitor Exhaust Gas Temperature – if over yellow band then cut fuel by fully closing the

throttle and depressing the idle release latch or closing the fuel valve, continue to motor

starter, do not release until temperature decreased into the yellow band.

As the temperature drops after the second EGT peak at about 35-40% N1, continue to open

the throttle slightly to maintain temperature within the yellow area. As you are doing so you

should pass the idle release latch at about 6% throttle position.

Pilot Information: The ideal EGT temperature during the start-up is in the yellow band in

order to stop the power turbine blades from “coking up” due to accumulation of soot and other

burnt deposits, thus reducing the turbine’s efficiency.

4.1.1.3 Environmental Factors to consider during Start-Up

4.1.1.3.1 Ambient Air Temperature

The ambient, (outside), air temperature has an effect on the Exhaust Gas Temperature during the

start-up procedure and has a bearing on at what N1 speed the fuel can first be delivered, (so long

as the starter has not hung due to low battery voltage):

- Below -18°C – Throttle can be opened to supply fuel at 12% N1.

- Between -18°C and 7°C - Throttle can be opened to supply fuel at 13% N1.

- Above 7°C - Throttle should not be opened to supply fuel below 15% N1.

Remember that in cold conditions, the engine inlets may be prone to ice formation. Consider

switching on the anti-icing system and pitot heat after engine start-up has completed.

Pilot Information: You may well decide to consider it best practice to always wait until 15% N1

before introducing fuel, regardless of the ambient temperature.