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-   -   Concorde descent & landing (https://www.airlinepilotforums.com/hangar-talk/37872-concorde-descent-landing.html)

Tantalum 03-10-2009 07:20 AM

Does anyone know the V-speeds? Back when FS had the Concorde I never seemed to get it right - oh well, the real thing is much cooler anyway.

I thought it was neat how they use reverse thrust to slow the plane during descent - I did a little research and found that the Trident does this, as doe the IL-86.

UAL T38 Phlyer 03-10-2009 07:25 AM

Sounds Low to me...
 
The 747-400 burns about 30 tons an hour at brake-release (total; about 15k per engine).

The F-4 burns 50 tons an hour in afterburner, total (98,500 lbs).

The T-38 burns 10 tons an hour in burner.

The Olympus engine was 32,000 lbs of thrust dry, and 38,000 in burner (not much extra, according to Wikipedia) which would make it slightly more efficient than the F-4 or T-38, but I would guess each engine would burn about 30 tons an hour in burner, and about 6-7 tons in cruise.

Maybe he said 140 tons an hour?

WalkOfShame 03-10-2009 05:15 PM


Originally Posted by UAL T38 Phlyer (Post 575752)
The 747-400 burns about 30 tons an hour at brake-release (total; about 15k per engine).

The F-4 burns 50 tons an hour in afterburner, total (98,500 lbs).

The T-38 burns 10 tons an hour in burner.

The Olympus engine was 32,000 lbs of thrust dry, and 38,000 in burner (not much extra, according to Wikipedia) which would make it slightly more efficient than the F-4 or T-38, but I would guess each engine would burn about 30 tons an hour in burner, and about 6-7 tons in cruise.

Maybe he said 140 tons an hour?

Yeah I don't know. He could've said 40 tons per hour. It was quick and I didn't really catch it that well.

joel payne 03-10-2009 06:02 PM

Concorde
 

Originally Posted by Tantalum (Post 575750)
Does anyone know the V-speeds? Back when FS had the Concorde I never seemed to get it right - oh well, the real thing is much cooler anyway.

I thought it was neat how they use reverse thrust to slow the plane during descent - I did a little research and found that the Trident does this, as doe the IL-86.

Back in the "old days" the DC-8 also used reverse for expedited descents. In fact there was a training incident where a DC-8 F/O was in training for B-727 CA. After returning from some touch and goes at an outlying field, ATC asked for an expedited descent. Before the instructor realized it, the trainee had put all 3 engines in reverse. Problem was, 2 of them stuck there. Uneventful landing made on remaining engine and the other 2 reverser's stowed on touch down. He spent a long time living that one down.

Scooter2525 03-13-2009 08:53 PM

I belive the c-17 also uses it for expedited descents. Pretty cool stuff!


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