Engine will cool at any throttle setting that enables the plane to fly.  The coolant & oil temp curve looks about like the power required curve of the airframe, minumum at around 95 mph and rises on either side of that speed.  Only exception is WOT at Vx on hot day.  Engine will exceed redline temps if this is maintained more than a minute or so.   Fortunately there is never any real need to do that. 

 

Tracy

 

On 9/26/07, Mark Steitle <msteitle@gmail.com> wrote:

Tracy,

 

Is there a particular speed that you must reach before your system cools? 

 

Mark

 

On 9/26/07, Tracy Crook <tracy@rotaryaviation.com > wrote:

For another data point, the delta T on oil cooler depends on power setting on my installation (no big surprise).  It is around 40 degrees F at higher power settings.

 

Tracy

 

On 9/18/07, Mark Steitle <msteitle@gmail.com > wrote:

For those that are flying (rotaries), I'm curious as to what delta-T you're seeing across the oil cooler.  And at what speed you attain adequate cooling.

 

Mark S.