Interested to know how you early SR20 owners handle descents without shock-cooling the engine. Particularly if you have to lose altitude quickly.
I don’t think you’ll have much of a problem. I made the transition to a similarly slippery and high performance single, a Bonanza, a little over a year ago w/ little problem. Here’s a relatively simple procedure: start pulling the power back about 1" every 30 seconds when you are way out. By the time you get to the pattern, if you’re being really conservative, you’re at 18". To drop speed to Vfe, if you’re not already there, pull up, level off, and you’ll soon be slow enough to add drag. As you get more comfortable, you can keep the power in longer. If you do find yourself too high and fast, something that often happens to Bonanza drivers (who often have more money to buy HP than time/energy to fly), ask ATC for a 360, they will usually accomodate you.
I also don’t know whether to buy the shock cooling argument, but to play it safe, I try to keep the cooling rate low. Also, when you plan ahead, your descents work out better. At this point, even if TCM and Lycoming said that shock cooling wasn’t a problem, I’d still pull power way out. Doing so makes it less likely that I’ll get behind the plane.
I think you’re question is a good one. I think the flame you got from someone calling themselves “757driver” was way out of line.
PS. I’m sorry about the multiple posts that I made
a few days ago. It was some interaction between this site and my browser that I still don't understand. Hopefully, this post will only show up once!
PPS. An instructor of mine told me that he checked out cooling rates. He found that he could pull power in some A/C (sorry, I forgot which, but it was in the 300 HP range and was turbocharged). He found that he could keep the cooling rate well below the 60F/minute specified by the engine manufacturer and pull power at 1"per 20 seconds, which is a lot faster than the standard of 1" per minute. The unexpected (to him and me) thing that blew the cooling rate limit was when his copilot opened the cowl flaps before they had finished the landing roll. The sudden cooling from the additional air on roll-out was the worst thing he had done.
PPPS. I don’t claim to be an expert and welcome corrections.