A1Skinner wrote:Sorry in advance for the drift, but why the extra 6" on the cover?
Because for some reason, every engine cover manufacturer ends their covers such that the entire outflow of the pressure cowl (the bottom aft opening of the cowling) is WIDE open. To me, it doesn't make much sense to dump a bunch of heat into a compartment that's wide open to the elements....I guess the manufacturers assume that all airplanes have cowl flaps you can close. Look at a bunch of engine covers, and you'll see what I mean.
Second reason: Your instruments actually reside up under that boot cowl to some extent. So having a cowl cover that insulates all the way back to the windshield helps to trap at least some heat on the back sides of the instruments. Any warmth you can convey to those instruments will help dramatically with wear and tear on them. Winter and instruments are'nt friends.
MTV