Barnhart wrote:

What are the minimum requirements for take off  for psi and temp of cooling
system.  Operating temp and pressures seem to be addressed for normal
flight.

Barny

The temp should be over 150 degrees F.

Paul Lamar

Finn Lassen wrote:

I know I asked this question before, but it's still unclear to me.

What are the liabilities of taking off with coolant below 150F and oil temps below ?

I've been taking off with temps as low as 80F.

Finn

The only thing I can think of right at the moment is the too rapid  thermal 
expansion of the aluminum  rotor housing compared to the steel tension bolts causing 
the rotor housing to shrink. The engine will then leak coolant into the
combustion chamber next time it is started up. It won't fail 
catastrophically it will just be hard to start.

Paul Lamar
 
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