One Eleven fuel

Post by **MALTBY D** » 28 Apr 2007, 12:54

Forgot the American Airlines 1-11 manual, they filled wings first too.

DispatchDragon · Post by **DispatchDragon** » 28 Apr 2007, 14:06

I had a long discussion with some of our older pilots

and I stand corrected in the 1-11s case

as I said Dan Air did fill the burn from the center tank first then allowed the

the wings to empty to the CT as the four main booster pumps aer located there - however on take off and landing they did run tank to engine with the crossfeeds closed.

Leif

Post by **DaveB** » 28 Apr 2007, 14:46

Hi Leif,

Tks for that

It does seem very much like DA did things against the norm though crossfeed off for takeoff and landing is, I guess, standard practice. They must have had their reasons but hey.. that's what makes this such an interesting hobby

ATB

DaveB :tab:

DispatchDragon · Post by **DispatchDragon** » 28 Apr 2007, 15:00

Dave the more I think about the more it seems to me the practice was insituted AFTER they took delivery of the 727s - Boeings main engine pumps
are in the center tank so the procedure there is to feed from the wings to the CT continously (Of course having a greater sweep than the 1-11 the CG change is greater) - prehaps they were trying for communiality on fuel management (Which beggars the question - What about the poor Comet F/Es?) :roll:

Leif

Post by **DaveB** » 28 Apr 2007, 15:08

I dunno mate.. but an interesting case nontheless

The fact that you can't burn direct from the centre tank on the 1-11's does seem to complicate things unnecessarily for all concerned and I doubt if many 727 pilots went back to 1-11's :think: An odd one and no mistakin'

ATB

DaveB :tab:

Nigel H-J · Post by **Nigel H-J** » 28 Apr 2007, 15:15

DaveB DaveM and Leif that was one enjoyable discussion to read especially as at no time did any-one get the hump!!

Post by **MALTBY D** » 28 Apr 2007, 15:22

Oi! I've not finished yet...

I wonder if the Dan-Air 1-11 fuel loading could have been a safety thing.

It is in the checklist to isolate the centre tank for takeoff & landing.
I assume that was for safety - if there's a survivable accident, you don't want fuel pumping out. (?)
If they went off the runway, it could be a good idea to have most of the fuel in the strongest part of the aircraft.

I'm probably miles wide of the mark there.

Making it the same as the other aircraft in the fleet seems a good bet.

The only other reason for choosing to put fuel in the centre tank is to set the CoG forward a little bit.
Maybe Dan-Air managed to stuff a few more people & bags in the back. I think that was company policy too.

DM

Nigel H-J · Post by **Nigel H-J** » 28 Apr 2007, 15:25

Sorry! :whistle:

Post by **MALTBY D** » 28 Apr 2007, 15:34

Yes, it started off a bit slow this one Nigel, but it's been fun.

Post by **DaveB** » 28 Apr 2007, 15:49

That could be a reason DM and one I'd not considered

My way of thinking was that it would be safer to ensure direct fuelfeed during takeoff and landing in case of emergency as it cuts out one more link in the safety chain.. eg, the booster pumps :think: I do like the idea of it stopping fuel pumping from the centre tank though

I dunno.. where's PeterM when you need him!!

ATB

DaveB :tab: