hhhmmmmmmmmm dega vue all over again

I flew mine with a OS46AX to begin with. Retrofitted an OS55AX to see how it'd do pulling that 6lb 5oz bird around. Neither engine ever broke a sweat.

If the off-side intake is left open, the cool air that comes in will go straight to the hot air exhaust openings and actually crowd out some of the hot air trying to get out. Cool air is easier to move than hot air. And cool follows cool. And hot air gets left where it got hot. And it just gets hotter and less easy to move. etc etc

But either block the unnecessary cool that's going to screw up the works, or divert it toward whatever needs to be cooled and the cooling system works better.

See the baffle in the useless side? It's a piece of polystyrene insulation that weighs zip. It is also very easy to sand and fit. I think it took me 5 minutes to fit it and epoxy in.