Thanks for the clarification fellman. Are you quoting from the same training reference that I used?
The Eurocontrol training materials link has another reference stating ‘5 sec’, but without specific application, i.e. 5 sec from alert to achieved VS, or 5 sec during the maneuver – its unclear.
My recollection during testing a system many years ago was of 2.5 sec ‘surprise’ (reaction) time plus 2.5 sec maneuvering.
The use of ‘g’ in a specification is fine providing the aircraft has an accelerometer, but in practical terms, a pilot requires specific guidance as to what a ‘smart’ maneuver is. Some of the training materials provide values of pitch change for speed, but the rate of pitch and feel of the maneuver will be aircraft specific, so practice is required.
Lookforshooter, the main point which has been made in many threads on ACAS is that pilots must follow the RA. This is a matter of discipline – airmanship.
As already stated, when an aircraft is at it’s maximum altitude, no Climb instruction will be given so the pilot does not have to consider performance, nor weather. There are similar safeguards at low altitude so that ACAS will not demand hazardous flight towards the ground.
A danger in aviation is from those pilots who figure that they know better than the system. If you do not follow a RA then you may cause an accident – it will be your accident as you will be part of the collision; no thinking, no judgment, just follow the RA.