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[FlyRotary] Re: Performance coatings- bearing
damage?
I use two 2nd gen
coolers, its real hard to keep the rotary cool in the coot as full
power climb out is only 80 mph and I hold full power for 30 to 40
minutes at a time when lifting off at a gross weight of 3200
lbs.
Ken
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)
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