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fanoftristars
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Posts: 1642
Joined: Mon Jul 17, 2000 9:03 am

Thrust Reversers Not Used?

Mon Oct 23, 2000 3:50 am

I tried to search the database to see if this question had already been answered, and I couldn't find anything.

Anyway, Here is the question. On my 2nd to last flight, a 762 DL, it didn't seem like the captain used the thrust reversers. No loud WOOOSSSHHHH. Now I have flown the 762 many times and I don't remember it being quiet like that. So I guess my question is: Do pilots not use reverse thrust in some instances and if the answer is yes, what are those instances?
"FLY DELTA JETS"
 
Guest

RE: Thrust Reversers Not Used?

Mon Oct 23, 2000 7:52 am

I have been on may flights where requirements of the airport or restrictions in place require a full run to the end of the runway. In most of these cases a nice brisk roll to get the the end of the runway when brakes were applied is all that was necessary to stop the aircraft.
 
Pacific
Posts: 1145
Joined: Fri Mar 10, 2000 2:46 pm

RE: Thrust Reversers Not Used?

Mon Oct 23, 2000 8:45 am

Noise abatement? I've heard of people here mentioning that because of noise abatement reverse thrust is banned in some airports, only brakes.

Pacific
 
Guest

RE: Thrust Reversers Not Used?

Mon Oct 23, 2000 10:00 am

Full reverse is not always required.

The crew probably wanted to "roll-out" to the end of the rwy to save taxi time. The pilot probably just used the idle setting for reverse. This essentially just kills any forward thrust and allows the aircraft to slow more gradually if rwy length is not a problem.
 
airfun
Posts: 106
Joined: Sun Jul 02, 2000 7:34 pm

RE: Thrust Reversers Not Used?

Mon Oct 23, 2000 5:51 pm

Great explanations...I learn something new everyday.
 
JETPILOT
Posts: 3094
Joined: Tue May 18, 1999 6:40 am

RE: Thrust Reversers Not Used?

Tue Oct 24, 2000 5:07 am

Some airplanes are equipped with new Kevlar brake pads.

The new Kevlar material wears less, and is significantly more effective when it is hot. Therefor some companies have adopted procedures where little or no reverse thrust is utilized on landing. Only wheel braking.

This procedure has been shown to reduce brake wear significantly.

If the brakes were only used below 60 knots then they would wear significantly while getting up to temperature, and spend little time in the optimal heat range.
 
prebennorholm
Posts: 7001
Joined: Tue Mar 21, 2000 6:25 am

RE: Thrust Reversers Not Used?

Tue Oct 24, 2000 5:28 am

In "my" airport - Copenhagen - the use of thrust reversers has been banned for several years, except for the case of an emergency of course. This is only to reduce noise.
In most cases the thrust reversers are indeed engaged, and the engines are spooled up to somewhat above idle. I assume that they do so in order to reduce responce time in case of a hydralic failure which affects the wheel brakes.
Using the wheel brakes only is somewhat more costly in brake and tire wear than using the thrust reversers. But when they are banned, then they haven't got the choise.
Best regards, Preben Norholm
Always keep your number of landings equal to your number of take-offs
 
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fanoftristars
Topic Author
Posts: 1642
Joined: Mon Jul 17, 2000 9:03 am

RE: Thrust Reversers Not Used?

Wed Oct 25, 2000 4:00 am

Thanks for the answers everyone. I know that reverse thrust is not banned at SLC, because every flight I have been on seems to use reverse thrust. I wish that I was sitting by the window on that flight, then I could have looked to see if the reverse thrust panel moved back on the CF-6.
"FLY DELTA JETS"
 
Guest

RE: Thrust Reversers Not Used?

Fri Oct 27, 2000 2:59 am

When we landed in Honolulu (8L)on a United 747-200 last March, the pilot only used idle reverse. I think this is because the Diamond Head concourse (where United's gates are) is almost at the end of the runway. I know it was idle because I could see the doors were open (we were on the upper deck), but no loud noise.

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