BB, you're not getting the idea. It's not markers for every type. Its not at V1. Just one marker, all types. Think of it being like the old rule of thumb, 80 kts at the fat markers. Instead though you have an actual speed at which the aircraft, when accelerating correctly, will pass that marker. Or your 100kts after 30 seconds, except you would know exactly how fast you should be at 30 seconds, or how long to
You have 15 years on type and know exactly what it should feel like. How about someone who flies multiple variants, different weights and thrusts, and with a far greater range of available assumed temperatures than the 747? Pilot flies the A330 mostly and then has limited time on the A340? How is he supposed to know?
The point is that it would not be difficult to set up a takeoff config style alarm for insufficient acceleration, and there have been more than enough accidents to highlight that it would be of benefit. SQ have done it, EK have done it... And they're the ones with major damage. Plenty of other narrow escapes... And in all of those cases pilots did not notice the low acceleration until too late.
As for your rigid interpretation of v1... You can say its v1 all you like, and operationally we treat it that way. But it's of no value whatsoever if you aren't meeting the performance it is predicated on.
You have 15 years on type and know exactly what it should feel like. How about someone who flies multiple variants, different weights and thrusts, and with a far greater range of available assumed temperatures than the 747? Pilot flies the A330 mostly and then has limited time on the A340? How is he supposed to know?
The point is that it would not be difficult to set up a takeoff config style alarm for insufficient acceleration, and there have been more than enough accidents to highlight that it would be of benefit. SQ have done it, EK have done it... And they're the ones with major damage. Plenty of other narrow escapes... And in all of those cases pilots did not notice the low acceleration until too late.
As for your rigid interpretation of v1... You can say its v1 all you like, and operationally we treat it that way. But it's of no value whatsoever if you aren't meeting the performance it is predicated on.
Comment