The 300ER generally needs TO-B with Flaps 20 at Heathrow :rolleyes: :lol:

 

Do not abuse the 77W, my favourite variant!

Do not abuse the 77W, my favourite variant!

 

Na'uh - she's my baby not yours <_<

 

 

 

:LMAO:

The 300 I took out yesterday only needed Flap 15 on a long range trip. I've run HKG-LHR with flap 5, a good load and 105 tonnes of fuel. It all depends upon the weather, weight, load etc.

 

I can't remember the last time I ran F20 except from an intersection out of Heathrow.

 

BTW BA don't use TO limits, only CLB limits. BA always run D-TO.

D-TO is likely due to the extra fuel burn if crew use a higher climb derate. Regarding airline limits on take off derates, the only limits I have come across is a ban on using a derate combined with an assumed temperature or flex.

 

TOPCAT also has an option to apply that limitation.

Regarding airline limits on take off derates, the only limits I have come across is a ban on using a derate combined with an assumed temperature or flex.

 

Do you know why, by chance? The idea that it's easy to kill [one of them - I forget which] with a second press of TO/GA, but not the other, so "your powers combined, I am" extra chance for disastrous takeoff incident?

Do you know why, by chance? The idea that it's easy to kill [one of them - I forget which] with a second press of TO/GA, but not the other, so "your powers combined, I am" extra chance for disastrous takeoff incident?

 

When using assumed temperature derate you can push the thrust levers beyond the calculated rating (to full if desired), but you can't when using a fixed derate as directional control is no longer assured (I assume a fixed derate allows a reduced Vmcg/Vmca, hence the risk of losing control should the thrust levers be advanced).

 

If you combine fixed and assumed temperature derates, there is no indication of where the fixed derate ends and the assumed temperature derate begins. If you then have a problem where you need to advance the thrust levers, you won't know how far you can go. Probably the reason they don't like them being combined.

 

 

Do you know why, by chance? The idea that it's easy to kill [one of them - I forget which] with a second press of TO/GA, but not the other, so "your powers combined, I am" extra chance for disastrous takeoff incident?

 

Jordan has it spot on, it's all to do with V calculations based on minimum controllable speeds (Vmcg/Vmca)

If you combine fixed and assumed temperature derates, there is no indication of where the fixed derate ends and the assumed temperature derate begins. If you then have a problem where you need to advance the thrust levers, you won't know how far you can go. Probably the reason they don't like them being combined.

 

Jordan has it spot on, it's all to do with V calculations based on minimum controllable speeds (Vmcg/Vmca)

 

Awesome. Thanks guys!

The 300 I took out yesterday only needed Flap 15 on a long range trip. I've run HKG-LHR with flap 5, a good load and 105 tonnes of fuel. It all depends upon the weather, weight, load etc.

 

I can't remember the last time I ran F20 except from an intersection out of Heathrow.

 

BTW BA don't use TO limits, only CLB limits. BA always run D-TO.

 

Have BA not considered EFB's and iPad's? All BA crew but one on the 777 I've spoke too said they'd love to use iPad's for charts. Also the one on the 777 wouldn't mind seeing the EFB in the 777's, however he doesn't mind not having it after doing performance the same way for years on the 73/75/76/77!

 

Have you guys departed from A5 on 27R with the 300 before? My charts show 3150m's but I'm assuming that's not counting the displaced threshold down by 09L.

AA's 777 pilots have approval to use the ipad and I think their 737 crews are close to getting approval if they haven't received it already.

Have BA not considered EFB's and iPad's? All BA crew but one on the 777 I've spoke too said they'd love to use iPad's for charts. Also the one on the 777 wouldn't mind seeing the EFB in the 777's, however he doesn't mind not having it after doing performance the same way for years on the 73/75/76/77!

 

Have you guys departed from A5 on 27R with the 300 before? My charts show 3150m's but I'm assuming that's not counting the displaced threshold down by 09L.

 

That does include the 09L threshold, it's also more like 3100m once you've lined up. Not including it, it's around 2750m.

That does include the 09L threshold, it's also more like 3100m once you've lined up. Not including it, it's around 2750m.

 

Sorry I meant it does, should learn to proofread more hehe.

 

Thanks Luke! (Yep, feels weird saying that LOL)

One of my local airlines uses the iPad on their F100s, I think more and more people are starting to use it. I can just imagine the next Boeing advert:

 

Buy 5 of our 300 million dollar 777s and we'll throw in 10 iPads completely FREE OF CHARGE!*

 

 

*Terms and conditions apply. iPads valued at $400 each, you got sucked in haha