Subject: [FlyRotary] Purging rad type cabin heaters

 

For you guys that have installed these rads, are there any issues

with air entrapment in these installations?

The one I have has inlet and outlet on one end which I was

planning to mount downward. Once hooked up will the water pump

move the air in the coils out of the system and back to the high

point in the engine compartment or should it be mounted to

facilitate purging the air?

Thanks

Peter

 

Peter;

 

I have a 7 x 7 core with the inlet and outlet on the same end, but mounted it with that end up.  I was concerned about air being trapped in the line, but verifyied that the flow would purge the air out of the 5/8 hose.  The flow velocity in the end tank of the heater core is likely considerably lower, and some air is likely to be trapped.  You’ll have to decide whether it would be enough to be concerned about; just adds a little compressibility to the system.  Then decide if you can turn the thing over, or add an air bleed.

 

Al