At what height are engines cut to idle in the flare ?
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Join Date: Mar 2001
Location: Toronto, Ont, Canada
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At what height are engines cut to idle in the flare ?
When is the power cut to idle in the landing flare in the 'big iron' (or even medium iron 
?
Bugsmashers, i.e. 172's etc, hey can cut at 1000' agl
What about various jets / turbo props ?
I've read that 767 is around 30' ??? , 747 flare at 50' .. but is the power also cut then ?
Mike
?Bugsmashers, i.e. 172's etc, hey can cut at 1000' agl
What about various jets / turbo props ?
I've read that 767 is around 30' ??? , 747 flare at 50' .. but is the power also cut then ?
Mike
Join Date: Apr 2001
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Normally you would chop the power crossing the fence. Any type. However, many airlines have their own training method.
Thing is: final approach speed depends on wind conditions. Typically you would want to raise your speed with half of the existing surface wind plus the full surface gust (reported by tower). This to a maximum of Vref+20. Cutting the power reluctantly would cause 'the big iron' to float, and float, and float, eating away concrete you require to stop.
Chopping power after the flare, which most of us still do, would require an extra tug on the control wheel (for low-wing suspended engines) to correct for the nose-down momentum as the thrust of the engines (which is pushing the nose up) disappears.
Still with me?
SJ
Thing is: final approach speed depends on wind conditions. Typically you would want to raise your speed with half of the existing surface wind plus the full surface gust (reported by tower). This to a maximum of Vref+20. Cutting the power reluctantly would cause 'the big iron' to float, and float, and float, eating away concrete you require to stop.
Chopping power after the flare, which most of us still do, would require an extra tug on the control wheel (for low-wing suspended engines) to correct for the nose-down momentum as the thrust of the engines (which is pushing the nose up) disappears.
Still with me?
SJ
Join Date: Jul 2000
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Some standard figures to go by for the 767, flare at 30ft, close thrust levers at 10ft.
But this will all depend on how fast you're going, if you're carrying 5 or 10kts too much, then you might think about closing the thrust levers at 30ft. If you've dropped a few knots below Vref then you might want to leave thrust on till right before touchdown to ensure a smoother landing.
But this will all depend on how fast you're going, if you're carrying 5 or 10kts too much, then you might think about closing the thrust levers at 30ft. If you've dropped a few knots below Vref then you might want to leave thrust on till right before touchdown to ensure a smoother landing.
Join Date: Aug 2001
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Never go by a height,what if ur rad alt fails,fly any machine to the ground,look ahead,reduce your rod level the nose and chop the throtts, and for GODs sake dont retard the throtts on a jet on the threshold.
Join Date: Apr 1999
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With the B737 it varies with each type.....On the -400 I often land with some power on to help to cushion the landing.....But on the -500 if you start the flare at around 30' and cut the power around 10' and hold the attitude.....Seems to owrk for me !
Join Date: Aug 2001
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757:
30feet: Slight check back on control column.
20feet: Gradually raise nose to put end of
runway half way up wind screen, at
same time closing thrust levers so
that as the Mains touch down, the
thrust levers are in idle position.
Obviously artistic license come into play, with whatever is required to land in correct spot with Vref+half wind.
30feet: Slight check back on control column.
20feet: Gradually raise nose to put end of
runway half way up wind screen, at
same time closing thrust levers so
that as the Mains touch down, the
thrust levers are in idle position.
Obviously artistic license come into play, with whatever is required to land in correct spot with Vref+half wind.
Join Date: Aug 2001
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In the B-744, at 25 feet RA the A/T starts retarding the Thrust Levers to idle and the A/T annunciation changes from SPD to IDLE.
Flares arms at 1500 feet RA and engages at approximately 50 feet RA (40 to 60 feet depending upon sink rate).
I hope this helps you.
Flares arms at 1500 feet RA and engages at approximately 50 feet RA (40 to 60 feet depending upon sink rate).
I hope this helps you.
