Hello, So say that I have a small four stroke engine that is designed to be kept static at ground level. I then take this engine and mount it to a small air plane, feeding the engine with either still air from inside the cabin (cargo) or the outside wind. The exhaust is fed out to the wind rushing by be plane in flight. What happens to the performance of my 4 stroke engine? What can I do to minimize performance loss as much as possible? Should I put a venturi valve on it? I am assuming that it is not desirable to change fuel consumption or the engines power output. If this is a weird question then I'd appreciate some tips on what topics to google. I don't really know much about engines.