That all sounds rather complicated to me but then I guess I`m ather simple. Here`s a couple of pictures of the front end of my 80" sport scale Spitfire showing the cooling inlet. That`s an OS 1.08 hiding behind there.

I have a custom-built muffler on one side of the cylinder head and a bent piece of ali. sheet closely following the contour of the head on the other side, and another angled piece screwed to the firewall that shoots the air down to the exit at the bottom rear of the cowling.

I was flying this model in air temperature of 31*C at a warbirds rally here just this last weekend and it never missed a beat or suggested any hint of overheating.

Alan W