Jim Carriere
January 18th 04, 09:23 PM
"Bart" > wrote in message
...
> Actually, the preflight maneuver was to spin them clockwise 360 degs.
> The reason you did that was to check for coke-ing of the turbine.
> Older C20-s had a problem with this, and by spinning the blades
> backwards you would also be spinning the turbine and you can hear
> and feel it. I've never heard of the opposite rotation being done,
> but im sure someone else will come up with a reason that it was.
> btw: spinning the turbine is still part of the postflight of the
> MD500, I was told that its because of the crazy engine angle.
This makes a lot more sense. I think I was remembering it bass-ackwards, so
at this point feel free to disregard what I wrote :) I hate to be "that
guy," a purveyor on misinformation on the net, so thanks for the timely
correction.
...
> Actually, the preflight maneuver was to spin them clockwise 360 degs.
> The reason you did that was to check for coke-ing of the turbine.
> Older C20-s had a problem with this, and by spinning the blades
> backwards you would also be spinning the turbine and you can hear
> and feel it. I've never heard of the opposite rotation being done,
> but im sure someone else will come up with a reason that it was.
> btw: spinning the turbine is still part of the postflight of the
> MD500, I was told that its because of the crazy engine angle.
This makes a lot more sense. I think I was remembering it bass-ackwards, so
at this point feel free to disregard what I wrote :) I hate to be "that
guy," a purveyor on misinformation on the net, so thanks for the timely
correction.