ox66 primary fuel filter replacement

[boscoe99]

Some of the octane levels used in the fighters in WWII were shocking. I need to go pull out the book and review.

80/87
91/96
100/130
115/145

Were the grades that I have been familiar with in my lifetime. Back in my Navy days there were many big radial piston engines needing the 115/145 stuff. A tanker truck with possibly a thousand gallon tank would come around after each flight and hand the nozzle up so that oil, yes oil, could be added. Some of the oil tanks (one per motor) held about fifty gallons.

First number is the lean mixture rating and the second number is the rich mixture number. Aircraft motors have a means of leaning and richening the fuel/air mixture that the carburetors provides to the motor. So you can see the effect that using a rich mixture has on preventing detonation.

Oh, and some used water or water/alcohol that got sprayed into the intake manifold to help cool the air and prevent detonation. There could be a lot going on with multiple speed blowers, propeller controls, cowl flap controls, mixture controls, throttle controls, etc., particularly if there were four sets, one for each motor. The young pilots today don't know how good they got it made.

[pstephens46]

80/87
91/96
100/130
115/145

Were the grades that I have been familiar with in my lifetime. Back in my Navy days there were many big radial piston engines needing the 115/145 stuff. A tanker truck with possibly a thousand gallon tank would come around after each flight and hand the nozzle up so that oil, yes oil, could be added. Some of the oil tanks (one per motor) held about fifty gallons.

First number is the lean mixture rating and the second number is the rich mixture number. Aircraft motors have a means of leaning and richening the fuel/air mixture that the carburetors provides to the motor. So you can see the effect that using a rich mixture has on preventing detonation.

Oh, and some used water or water/alcohol that got sprayed into the intake manifold to help cool the air and prevent detonation. There could be a lot going on with multiple speed blowers, propeller controls, cowl flap controls, mixture controls, throttle controls, etc., particularly if there were four sets, one for each motor. The young pilots today don't know how good they got it made.

I'll try to post a few pics tomorrow. There is a document under the bed where my wife is sleeping. Let em sleep I say.

Few years back I was watching a crop duster land and take off in VA. Peanut country. His plane had a big radial on it. His helper added oil EVERY single time the plane landed. I bet that motor is still running somewhere.