The part not there in the pictures is the cylinder cowl, so it will end up looking like a typical CL speed cowl. The drawing is the top and bottom profile templates which I haven't made yet. The plasticine part is just the bottom end and it has some work to go - it will graft into the cylinder cowl. So yeah I'll land on the cowling but not on the engine per se. On grass and under 10oz, it is not going to hurt anything. There will be a small cooling inlet, air forced through the cylinder/head fins and either through the back or a top outlet. I'll probably flare the TE of the cowl airfoil and shape it to create negative pressure at the outlet.