>Ken put a teaspoon full of it in a steel cat food can and bake it in
>the oven at
>500 F for 1/2 hour and tell us what it looks like.
>
>Paul Lamar
If my engine ever gets to 500 degrees I think I will have bigger problems.
Sorry cant change my mind.
I will note that a couple times in the winter when I was flying in
sub zero temps that I changed over to Castrol 5-50 synthetic as its
about as thin as water.
Ken
There are spots in the engine subject to wear where the local temp can get to
500 F and that is where Mobil One pays off. Probably mostly on start up
when bearing surfaces are nearly dry of oil. No doubt about it... there
are fewer such spots in a rotary.
Mobile One makes 15-50 and that is what I use.
Paul Lamar
I will argue that my bearing were dry for about 15 or 20 seconds
after the low oil buzzer went off until it seized and I restarted the
engine twice and milked another 15 0r 20 seconds out of it each time
with zero oil pressure and the bearings are in fine shape and I will
use them over again so I don't know what else I could ask of my oil
except to let me fly home and I doubt that Mobil one would do that
ether.
I will also bring up the time that my engine seized due to all the
shavings of the Ross redrive plugging up the oil intake.
Again the low oil buzzer went off and I had 10 lbs oil pressure and
from passed experience of the thrust bearings going out and dropping
the oil pressure I knew that it was about to seize.
I was at 6000 ft with the tops at 5000 and a ceiling of 500, at that
point I turned and lined it up with the Columbia river just as the it
seized, when I punched out of the bottom I restarted the engine and
it seized again after about 15 or 20 seconds, then just as I was
about to hit the water I restarted the engine and held it in ground
effect at about 2 ft touching the water now and then at a very low
power setting at about 55 mph and held it for about 15 miles without
a seizure.
This would lean to the theory that it was rotor expansion as you
would think that 10 psi would give enough lube on the sides of the
rotors to stop friction welding and again the main bearings were fine
and I used them over again.
Ken
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