Moderators: richierich, ua900, PanAm_DC10, hOMSaR
Brucekn wrote:I did a search on “GE90-115B taxi thrust” and got some hits but didn’t answer my question.
I have just made a round trip from LAX to AKL on NZ, flying in their B77W (NZ 1 / NZ6). I was in “steerage” in the back of the aircraft so engine sound is somewhat limited to the sound of thrust, and less so the sound from the turbines, although the distinct startup resonance was very loud in the aircraft.
I noted that when taxing out to take-off at LAX and AKL, that the aircraft seemed to move effortlessly and didn’t appear to require additional thrust from idle to “un-stick” the aircraft. We appeared to reach what I would call a fast taxi in both instances, once again without any additional thrust beyond idle.
What I’m wondering is if “idle” thrust is able to be set from gross weight, or if there is just one setting for “idle” thrust and it’s sufficient to enable an aircraft with fuel for an 11.5 hour flight (approximately) to taxi? I also noted on landing (presuming considerable fuel weight consumed in flight) that the aircraft didn’t need a lot of braking action- hence I’m wondering if take-off “idle” thrust is higher- and if so, how is it set?
Thanks.
ikramerica wrote:Would you hear the increase from 21-26% as a passenger especially if you went back to 21% quickly?
Brucekn wrote:Thanks for the replies. What amazed me was the (apparent) lack of braking needed after 11.5 hours of flight, assuming the same idle thrust was used for taxi to take-off and taxi from landing to the gate.
Brucekn wrote:Thanks for the replies. What amazed me was the (apparent) lack of braking needed after 11.5 hours of flight, assuming the same idle thrust was used for taxi to take-off and taxi from landing to the gate.
Starlionblue wrote:The slope of the taxiway has a big effect on the need for braking. So that may have been a factor.
FriscoHeavy wrote:Brucekn wrote:Thanks for the replies. What amazed me was the (apparent) lack of braking needed after 11.5 hours of flight, assuming the same idle thrust was used for taxi to take-off and taxi from landing to the gate.
Lack of braking on the runway at touchdown? The fact that it was an 11 1/2 hour flight has nothing to do with that. At the end of a given flight, most aircraft will be rather light.
TOGA10 wrote:FriscoHeavy wrote:Brucekn wrote:Thanks for the replies. What amazed me was the (apparent) lack of braking needed after 11.5 hours of flight, assuming the same idle thrust was used for taxi to take-off and taxi from landing to the gate.
Lack of braking on the runway at touchdown? The fact that it was an 11 1/2 hour flight has nothing to do with that. At the end of a given flight, most aircraft will be rather light.
I think Starlionblue was talking about the taxi in after vacating the runway, as was the OP.