Subject: [FlyRotary] spray bars

 

in all this discussion about thick cores, since I am building a p-51 style

5" core myself for my -8, I wondered how effective a water spray bar would

be for the few minutes of critical climbout airspeeds.  how effective is a

spray bar?  it seems stupid to have a larger radiator to handle a very small

portion of the flight.  would that much water need to be carried for a

typical flight?

 

The idea of the water spray for the short durations of high power would seem o have merit.  But I’d think the idea is to get the water onto the surfaces of the radiator where it can most effectively remove the heat by evaporating.  Fine mists evaporating into the air stream may improve things a bit by increasing the air/water delta T, but would be much less effective than taking the latent heat off the rad surface.

 

So maybe a coarse spray at an angle near the rad surface is the way to go.

 

Al