Another by product of having a smoke system is you get to see, first hand, exactly where your exhaust goes ….
Turns out .. my 2 small slits around the undercarriage legs let wind, exhaust etc into the cockpit areas … ok it’s open topped and whizzes straight through BUT .. not great ….
When smoking … and pulling up in a stall .. like most flights …! The cockpit gets smoke coming through ..
Solution … two small leather patches glued around the gap to make a seal and also look traditional with pinked edges