B777 Cabin Temp increase with packs off
Fleet Manager
Joined: Apr 2001
Aviation Qualifications: ATPL
Posts: 7,448
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From: various places .....
Thank God .. at last, Mutt is a convert to the theology of overspeed takeoffs ...
For ID,
improved climb = overspeed takeoff
is a simple tradeoff. Minimum speed schedule for takeoff is well below best climb performance speeds .. ergo .. if you have a bunch of spare runway (considering obstacle problems) often you can increase the speed schedule to achieve a better V2 climb performance. This may increase your RTOW, depending on what was limiting for the basic calculation. In general, it is well worth having a looksee to check what the situation is for a given set of circumstances.
Important to keep in mind that there are quite a few ticks in the boxes needed before you end up with the best weight calculation .. sometimes a bit of pushing and pulling with the calculations can yield significant benefits.
For ID,
improved climb = overspeed takeoff
is a simple tradeoff. Minimum speed schedule for takeoff is well below best climb performance speeds .. ergo .. if you have a bunch of spare runway (considering obstacle problems) often you can increase the speed schedule to achieve a better V2 climb performance. This may increase your RTOW, depending on what was limiting for the basic calculation. In general, it is well worth having a looksee to check what the situation is for a given set of circumstances.
Important to keep in mind that there are quite a few ticks in the boxes needed before you end up with the best weight calculation .. sometimes a bit of pushing and pulling with the calculations can yield significant benefits.
