Incidend during take off in Doha

[punkalouver]

Originally Posted by Black Pudding

So, you would be happy to call V1 5 kts early and take a fire into the air. How bad is that ?

I used to fly a large turboprop out of a very short runway that was gravel in the summer and hard pack snow in the winter. It had dropoffs at each end. On takeoff, I had every intention of continuing if there was a fire indication 5 knots below V1.

Then I would put the fire out and land. Or write up the false warning.

[mutt]

So an early V1 call is potentially even worse.

I would agree with you if you had chosen to use a Min V1 policy, but if you are using Balanced V1 or Max V1, and you call V1 @ -5 Kts but not lower than the Min V1, then what is the problem?

Mutt

[Wizofoz]

Mutt,

Fact is, most folks don't know what basis their particular V1 is calculated on. It's a number spat out by the book or OPT.

It may well be V1min, but people will still call early because of the attitudes being displayed here.

[Flyer1015]

People call it out (or SHOULD call it out) based on airline policy. My airline's policy is to call out V1 at V1, so I do. But there are other competitor airlines, and my friends there tell me they bug V1 and company procedure is to call out V1 at V1-5kts.

[Sciolistes]

Fact is, most folks don't know what basis their particular V1 is calculated on. It's a number spat out by the book or OPT.

Agreed, we don't have a clue. But the computer does not do balanced field performance unless it has to. It would probably be a bit of a mugs game to try and second guess these things.