Jan Olieslagers
*
Join Date: Jul 2010
Location: Near EBGB
Posts: 967
I am surprised to see no mention of the cowling vanes (or what do you call them?) ; I always understood Lycosaur-powered planes have them, and proper technique includes closing them during descent (sic!) for the exact reason of avoiding, or at least reducing, shock cooling?
Cowl flaps, and it depends. None on the 152/172, Pa 18 supercub, and many others.