Ken,

Is that lower temp with the 2nd oil cooler?

George ( down under)

 

   When I first started flying my coot the rotors were not coated and I was fighting cooling problems and I was seeing oil temps up to 260 degrees on full power climb and cruising at 220 degrees, I then pulled the engine down and coated the rotors without pulling the bearings and had no problems with them.

 After coating the rotors the temp toped out at 220 on climb and dropped to 180 in cruise, at that point that was the only change I made and ran it for several hundred hrs so that should be a good comparison of apples to apples, since then I have made changes that has dropped the temp to 160 on climb and 140 in cruise.

 Ken Welter

Greetings,

 

I just talked to Brad at Performance Coatings, and he said they try to batch items together, to keep from wasting material.  For scheduling purposes, it's interesting to note that they do piston tops, and rotors on Wednesdays.   They charge $45 for each rotor.  The process includes blasting the rotor faces, spraying on the coating, and curing it at 350 degrees.  They have a fixture that they use on rotors, which keeps anything from touching the bearing.  

 

Will the bearing be damaged at 350 degrees?  I'm thinking there's a good chance it will. 

 

Thanks,

Rusty (still undecided)