F4U Takeoff problem

Originally Posted by JtD

To my knowledge, it only cools. It doesn't appear to increase power output or fuel consumption. I use it to run the engine cool at sea level.

It works like the Fw190 erhöhte notleistung system in that it uses additional fuel evaporation to cool the compressed air in the intake manifold to allow a current unstable, or even higher, boost pressure. (Water -along with its required antifreeze - works better as it doesn't upset the mixture ratio.) The Germans found that simply spraying MW50 into the supercharger, with no change in throttle or supercharger settings, was good for a 4% increase in power while simultaneously reducing temps.