Shock Cooling
Bit of a techi question I'm afraid.
Since having my EDM-700 fitted I've been spending a fair bit of time looking at shock cooling warnings when descending into the circuit. Even while keeping some power on during the descent it is very difficult to maintain a less than recommended 50 degree CLD (it's a Lycoming engine), usually a figure of around 60 or 70 is the norm. My question is how long does it take shock cooling to damage an engine? Is 30 seconds long enough to have an affect or is this something which is only important during lengthy descents greater than a few thousand feet?
I think this has been discussed before during a thread on a different subject but would like peoples views on this specific subject.