what speed when both engines fail
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from the classic QRH from my company;
At or above FL270, set airspeed to 275 knots.
Below FL270, set airspeed to 300 knots.
below fl100 i would start to reduce towards min clean.
hope this helps.
At or above FL270, set airspeed to 275 knots.
Below FL270, set airspeed to 300 knots.
below fl100 i would start to reduce towards min clean.
hope this helps.
Last edited by skyhigher; 28th Feb 2012 at 18:41.
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V clean above FL200 for stall margin, Vp clean below FL200 is used in my airplane for drift down on one engine. If both went silent, I would use V clean if clean, and Vp for whatever config I have.
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I have always thought that the best L/D speed is achieved at approximately 1.6Vso, but I'm not sure I can document the reasoning.
Love the restart idea though...
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Why not just follow the loss of thrust on both engines checklist? Says in step 5 in mine for the 737NG:
At or above FL270 set airspeed 275knots. Below FL270, set airspeed to 300knots.
However, below FL100 i would start looking where to set it down and slow down to up speed.
At or above FL270 set airspeed 275knots. Below FL270, set airspeed to 300knots.
However, below FL100 i would start looking where to set it down and slow down to up speed.
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Denti,
i agree 1000000%, follow the QRH.
The numbers that i said before are just some figures to have at the back of your mind.
The question by our friend was not, what is the best speed for a windmill start.
The question was about Gliding Speed!!!
Regards
i agree 1000000%, follow the QRH.
The numbers that i said before are just some figures to have at the back of your mind.
The question by our friend was not, what is the best speed for a windmill start.
The question was about Gliding Speed!!!
Regards
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At or above FL270 set airspeed 275knots. Below FL270, set airspeed to 300knots.
Join Date: Mar 2010
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Well, if run out of fuel or any abnormal/emergency situation that led to a double engine out without chances to restart, I'd set the Vclean and hope to have a strip within my gliding range (for the B737 Classic, a good rule of thumb is 2.5 x Height)
Check this out, really interesting:
Loss of Thrust on Both Engines
Ciao
Check this out, really interesting:
Loss of Thrust on Both Engines
Ciao
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RTFQ?
He says you have to drift down. Why is that a range question? It could just as easily be a terrain question or a don't kill the pax with hypoxia question or many others.
He says you have to drift down. Why is that a range question? It could just as easily be a terrain question or a don't kill the pax with hypoxia question or many others.
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FE, I agree, if your airport is near where you lost both engines get down first then at low altitude use min clean speed until you need to configure for landing. Dead sticking an airliner isn't hard, you just can't get low.