|Quoting Fly707 (Reply 6):|
Using brakes would be much more cheaper than using TRs during taxing .
Not on most coporate jets. They have brake temp limits for takeoff shall a RTO is needed.
I've seen Gulfstreams use T/R at HPN
. Just idle thrust, no additional thrust off idle, otherwise you would hear it roar with it deployed.
If the brakes gets over the limit, then that will cost you time and fuel waiting for it to cool down (idling in the runup area), possibly adding mess to the ground traffic if there are other a/c in line waiting to take off.
Thrust reverse doesn't shorten engine life if it's just deployed but not off idle. Add power while in thrust reverse will considerably shorten the life due to increased EGT.
As for most airliners, they use idle thrust reverse to conserve fuel and engine life unless it's really needed.