G'day Nicholas,
The reason sometimes that jet aircraft are stopped on the runway and part power is applied before takeoff thrust is set is because sometimes the engines initially accelerate unevenly from idle. So rather than setting takeoff thrust straight from idle and getting a large thrust imbalance, part power is set, the engines stabilised and then takeoff thrust is set.
When doing a rolling takeoff you can advance the throttles as you enter the runway and if it all looks good then you can set takeoff thrust without getting a thrust imbalance.
It's not a rushed takeoff but an expedient way of entering the runway and taking off without stopping.
I'd be surprised if any jet operators set takeoff thrust on the brakes.
Regards,
BH.
Hey Mods, Has this thread been merged with another one?
Last edited by Bullethead; 12th September 2007 at 08:16.