Hi I am curious as to know what the CFM rate of a .46 average glow engine has at WOT and maybe someone know what it has at 1/2 and 3/4 throttle.

THANKS!!!

Are you curious as to the amount of air entering the carb and leaving through the exhaust or the amount of air being moved by the prop?
Paul

exhaust and intake

2.928240741 Cubic Ft @ 100% eff for a 46 with a 11-6 prop at 11,000 rpm

So, how long would that engine run in a 12'x20'x8' air tight garage?

655.68379440835052571246224594483 minutes before it ran out of air.

David

And will it collapse the walls and roof? Well that depends......... .
I can't imagine why this needs to be known but it's just a simple math problem. Engine size is in cub inches so divide that by 1728 to get engine size in cub feet. Multiply that by whatever RPM and you have cub feet/min. Then take a guess at engine efficiency (let's say 80%) and multiply cub feet/min by .8 and there's the answer. Exhaust volume (once it's cooled down) should be about the same because combustion has converted one gas (oxygen) into another gas (CO2).