High/Low 3rd sector accel - Safe?/Unsafe?
Hi there,
Currently in a "discussion" with somebody about acceleration altitudes and achieved climb gradients.
Consider an bizjet certified in yr 2000, with a published accel altitude of 1000ft AGL. It would appear that we are being told to climb at V2 until accel altitude or chart MSA whichever is higher(which invariably is higher than 1000ft!).
I'm personally not too happy about this, surely if we are being asked to climb to 7000ft for example (In europe) in a dirty configuration at say 115-120 knots (V2) then there is no way we are going to achieve published climb gradients and could well end up hitting the piece of granite we are trying to avoid.
I personally am advocating (In the sim scenario of a Engine Failure just after V1) of a "close in" sector three acceleration of the 1000ft published figure and cleaning up and accelerating to 150 VENR and achieving a better gradient.
So the question is even though you know the terrain is out there, do you do what feels good and leave the flaps where they are or have faith in the manufacturers figures and cleanup/speedup earlier.
I personally favour the latter but am getting a lot of adverse grief from more experienced/greyer people who have been doing the job a long time, I'm more than willing to doff my cap etc and be proved wrong.
More info:
In fairness lets assume its a UK Jar Ops AOC holder doing ad - hoc charters and doesnt have access to surveyed obstacle data for an airport you only found out you were going to 2hrs before.
In rough percentage terms just how much gradient do you think we are losing by using the unofficial procedure (Difficult to quantify but a rough guess will suffice)
Thanks for your advice chaps