LH492
Topic Author
Posts: 203
Joined: Wed Feb 01, 2006 6:14 am

Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 5:50 am

Hi,

I came across this picture and wondered if anybody could explain, why the pilot deploied the thrust reversers, even though the plane did not touch down yet.

http://www.flugzeugbilder.de/show.php?id=512132

thanks in advance,

Philipp
Carpe Diem, Seize The Day
 
RichardPrice
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Joined: Sat Apr 23, 2005 5:12 am

RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 5:54 am

Certain Russian aircraft (and the VC-10, which that isnt) can deploy reverse thrust in flight as a speed brake.

Thats what you are seeing.
 
brettdespain
Posts: 126
Joined: Wed May 18, 2005 5:40 am

RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 5:56 am

It was very common to use thrust reversers in-flight on the DC-8 as well, although I don't remember seeing it done during the landing flare.
V1...Rotate.
 
trekster
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Joined: Fri Dec 26, 2003 2:47 am

RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:08 am

The 146's deploy there speed breaks pre landing

Odd sight when i first saw it
Where does the time go???
 
MCOflyer
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:14 am

I heard the DC-6 and DC-7 do it as well. I read the Flying tiger book by Moldrem and it said someone doing reversing the inboards doing decent.

MCOflyer
Never be afraid to stand up for who you are.
 
LH492
Topic Author
Posts: 203
Joined: Wed Feb 01, 2006 6:14 am

RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:28 am

Quoting RichardPrice (Reply 1):
Certain Russian aircraft (and the VC-10, which that isnt) can deploy reverse thrust in flight as a speed brake.

But wasn´t that the cause of the Lauda Air 767 Crash in Thailand?
If memory serves me right, the reverse thrust deployed in mid flight causing the plane to crash. After that incident, planes got modifications in order to prevent similair accidents. If those planes you mentioned are able to deploy their thrust reverser in mid flight, isn´t there still a chance, that such an accident could happen again?
Carpe Diem, Seize The Day
 
Adam727
Posts: 105
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:34 am

I thought the concorde could deploy its reversers inflight also.
 
trekster
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:36 am

Quoting LH492 (Reply 5):
the reverse thrust deployed in mid flight causing the plane to crash

Yes, that was one side and at high altitude, so ripping the wing off. one engine full one way, one engine full teh other, something has to give
Where does the time go???
 
RichardPrice
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:38 am

Quoting LH492 (Reply 5):
If those planes you mentioned are able to deploy their thrust reverser in mid flight, isn´t there still a chance, that such an accident could happen again?

The 767 wasnt ever designed to deploy reverse thrust off the ground, hence the ability for the engines to deploy independantly. This is corrected on those aircraft taht can deploy in operational flight.
 
vc10
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:44 am

Quoting RichardPrice (Reply 1):
and the VC-10, which that isnt) can deploy reverse thrust in flight as a speed brake.

I think you might have meant the Trident. The VC-10 had wing spoilers which it could deploy as very good speedbrakes if required

littlevc10
 
RichardPrice
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:49 am

Quoting VC10 (Reply 9):
I think you might have meant the Trident. The VC-10 had wing spoilers which it could deploy as very good speedbrakes if required

Actually no, on the few airframes produced prior to 1965 the inboard engines could have their reverse thrust buckets deployed inflight. These were removed after 1965 due to tail buffetting problems and thus the capability was removed with them.

The Trident could as well, you are correct.
 
vc10
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 6:55 am

Richard ,
I was on VC-10 from 1964 to 1975 with BOAC and no one ever selected reverse in flight.Now if you mean on the test aircraft well I cannot say anything about that as I was not involved.

littlevc10
 
RichardPrice
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 7:00 am

Quoting VC10 (Reply 11):
I was on VC-10 from 1964 to 1975 with BOAC and no one ever selected reverse in flight.Now if you mean on the test aircraft well I cannot say anything about that as I was not involved.

It was definitely a capability built into the first dozen or so airframes before the inboard reversers were removed from the design, my grandfather flew them and used to regale me with tales of the quick descents he made due to this feature (and no, he never flew the Trident).
 
oneskyjet
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 8:41 am

I have flown a number of times on IL-62s and can tell you definitively that they commonly apply reverse thrust prior to and at the flare.

Weird but true. Actually makes for an amazinglys smooth landing.
 
vc10
Posts: 1352
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RE: Deploying The Thrust Reverser While Flairing?

Wed Jul 26, 2006 8:43 am

Richard,

Well I defer to grand father's knowledge, but whilst the
Standard VC-10 had reversers on Engines 1 & 4 only, the Super still had reversers on all 4 engines until after I left the fleet if my memory still serves me.

Anyway not to worry, and who knows I might have flown with your grandfather.

God that makes me feel old  old 

littlevc10
 
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scbriml
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RE: Deploying The Thrust Reverser While Flairing?

Mon Jul 31, 2006 8:50 pm

Our Russian friends have been doing it for a long time!
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