dear Yo-Yo, is there any way, to use WEP, and maintain a reliable engine?

[Mike Busutil]

I am noticing if I leave the coolant and oil radiator's in the auto position while flying level with 46"mp and 2700 rpm that my temps still get into the red...

 

I want to say the auto radiator settings are not keeping the temps down where I expect them.

 

I would assume a good airspeed is also required to maintain good temps but I also would expect the radiator doors to open more as the temps get into the red.

 

I have no problems when I have them set open in manual but I always see the temps climb while I am in the auto setting...

[ZaltysZ]

I am noticing if I leave the coolant and oil radiator's in the auto position while flying level with 46"mp and 2700 rpm that my temps still get into the red...

 

I want to say the auto radiator settings are not keeping the temps down where I expect them.

 

I would assume a good airspeed is also required to maintain good temps but I also would expect the radiator doors to open more as the temps get into the red.

 

I have no problems when I have them set open in manual but I always see the temps climb while I am in the auto setting...

 

Auto actuator works in a way something like this (a bit simplified): it knows 2 temps: min (let's say lower mark of green zone) and max (let's say the red mark), then:

 

a) if it senses the temp below min, it closes the doors until they are fully closed or until temp rises above min

b) if it senses the temp above the max, it opens the doors until they are fully opened or until temp drops below max

c) if it senses the temp between min and max, it leaves the doors alone.

 

System is intended to keep the temps between min and max, however it does not care what you get exactly: it might be near min, near max or in the middle. In addition, operation of doors isn't very fast, so if you are not very friendly to system (like long shallow dive, quick energy bleed, prop hanging or prop hanging, steep dive) you can easily end with temps outside of operating range for a short time.

[Mike Busutil]

Good explanation Zaltysz,

 

Thank you.

[FunktasticLucky]

This is a great explaination except I do not find mine working this way at all. In the auto position they dont' seem to work at all. It's like it closes them and then just leaves them shut as my temps go well into over heating. I just stick to manually operating them now.

[HotTom]

This is a great explaination except I do not find mine working this way at all. In the auto position they dont' seem to work at all. It's like it closes them and then just leaves them shut as my temps go well into over heating. I just stick to manually operating them now.

 

^+1:(