King Air C90 2nd Engine Flame Out Procedure
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King Air C90 2nd Engine Flame Out Procedure
Greeting fellow pilots.
This is a question to any experienced King Air/Turbo prop pilots, The 2nd engine Flame out Procedure as per the manual requires the following response:
1. Power Lever---Idle
2.Props----- ****DO NOT FEATHER***
3. Condition lever---- Cut off
4. Conduct Air start procedures.
Now my question is regarding the Propellers in this case, the action expected is not to Feather the prop, wouldn't loss of oil pressure due to loss in engine power drive the prop toward feather in the first place?
What is the significance of not feathering the prop, especially in the King Air engine which is a free turbine engine, so would being feathered or unfeathered make any difference in the ease of air start since the prop is not connected to the gas generator shaft anyways?
Just a question i ve been pondering upon, if any of you experienced pilots can shed some light, would be much appreciated.
Thank you for reading and sharing.
This is a question to any experienced King Air/Turbo prop pilots, The 2nd engine Flame out Procedure as per the manual requires the following response:
1. Power Lever---Idle
2.Props----- ****DO NOT FEATHER***
3. Condition lever---- Cut off
4. Conduct Air start procedures.
Now my question is regarding the Propellers in this case, the action expected is not to Feather the prop, wouldn't loss of oil pressure due to loss in engine power drive the prop toward feather in the first place?
What is the significance of not feathering the prop, especially in the King Air engine which is a free turbine engine, so would being feathered or unfeathered make any difference in the ease of air start since the prop is not connected to the gas generator shaft anyways?
Just a question i ve been pondering upon, if any of you experienced pilots can shed some light, would be much appreciated.
Thank you for reading and sharing.
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1. Power Lever---Idle
2.Props----- ****DO NOT FEATHER***
3. Condition lever---- Cut off
4. Conduct Air start procedures.
Now my question is regarding the Propellers in this case, the action expected is not to Feather the prop, wouldn't loss of oil pressure due to loss in engine power drive the prop toward feather in the first place?
What is the significance of not feathering the prop, especially in the King Air engine which is a free turbine engine, so would being feathered or unfeathered make any difference in the ease of air start since the prop is not connected to the gas generator shaft anyways?
BTW, the Twin Otter has Power, Prop and Fuel levers. No condition levers.
If the end result was to have both engines out, without a hope for either or both engines being restarted, you definitely want them both feathered to extend the glide...and that does make an enormous difference.
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Hi Desert185,
May I ask you a question regarding the twin otter?
From my understanding, the drill for an engine out after take-off is to select max power and flap 10.
Now, let's say the engine fails just after you have retracted the flaps on take-off and you're at about 500 ft. Would you then re-extend them to 10 or leave them up?
Thanks
May I ask you a question regarding the twin otter?
From my understanding, the drill for an engine out after take-off is to select max power and flap 10.
Now, let's say the engine fails just after you have retracted the flaps on take-off and you're at about 500 ft. Would you then re-extend them to 10 or leave them up?
Thanks
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Isn't the oil pump driven from the accessory gearbox, which is driven by the power section - which is connected to the propeller?
AS
AS
Last edited by Air Soul; 6th Sep 2010 at 22:47. Reason: Spolling....
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Nope, accessory section in a PT6 is driven by the compressor turbine.
In the C208, different airspeeds apply for an air start without starter assist depending on whether the propeller is feathered or not. In this case I suspect the reason is the wind milling propeller drives the power turbine drawing more air through the engine.
In the C208, different airspeeds apply for an air start without starter assist depending on whether the propeller is feathered or not. In this case I suspect the reason is the wind milling propeller drives the power turbine drawing more air through the engine.