MD11 Critical take-off speeds

[gaetano]

Hello, I found in a not recent video that during take off a caption popped up reading "incapacitation check 80kts". Can anyone tell me why that speed was called that way? Thanks a lot in advance

[gearlever]

Originally Posted by gaetano

Hello, I found in a not recent video that during take off a caption popped up reading "incapacitation check 80kts". Can anyone tell me why that speed was called that way? Thanks a lot in advance

Don't know the MadDog but in my company it was 80kt as well for many years. Then training deptmnt changed it to 100kt (high energy regime).

IMHO the wording "incapacitation" doesn't exlude an airspeed reliable check.

[gaetano]

Thank you gearlever for your prompt reply. I meanwhile found the use of that word "incapacitation" to chek that the FP was still alive at that point of the manoeuver. In case of no reply the NFP would take command.

[gearlever]

Originally Posted by gaetano

Thank you gearlever for your prompt reply. I meanwhile found the use of that word "incapacitation" to chek that the FP was still alive at that point of the manoeuver. In case of no reply the NFP would take command.

Exactly and ABORT

[vilas]

Airbus uses 100kt as airspeed check. It is entry into the high speed zone. May be because thrust set has to be ensured by 80kts. Eighty knots is too less a speed to demarcate high speed zone. Hundred knots is safe enough speed to reject for any problem. And any standard call is also incapacitation check. If not responded second time the PM is to take over.

[gaetano]

Thanks to you all