Buly, You may be correct about the .027" error causing the problem
and I hope that is true.
But, The key phrase here is "centered as the original transmission
gear box". Is the transmission bolt circle concentric with the
crankshaft? Is the transmission input shaft concentric with the bolt
circle? They might be (I have not checked) but there is no rule
saying they have to be. For example, the RX-7 starter looks as
if the pinion is concentric with the starter pilot and pilot hole that it mounts
in. It is not.
Tracy
----- Original Message -----
Sent: Tuesday, January 17, 2006 11:49
PM
Subject: [FlyRotary] Re: Coil & Alt
cooling, Buly's input shaft
Tracy,
I picked up the resurfaced assembly today, and the
machinist told me
that one end to the other of the gear box contact
surface was .027 off.
I removed the original automatic transmission gear
box from the
bellhousing and replaced it with my new mounting plate.
So everything
was centered as the original transmission gear box.
All the mounting
bolt holes were match drilled. With the extra long
shaft, .027 will
give quite difference at both ends of the
shaft.
I don't see anything else to check?
Buly
> Input
shaft
>
> Buly, got your input shaft today and checked it
out. The thrust
> bearing rollers & races look a little
stressed but the roller cage
> has been completely trashed.
I do not think the .005" out of
> flatness on your bellhousing
would explain this and the odd wear
> pattern on the plate.
The marks and discoloration (heat) on the
> bearing and shaft
look as if there is misalignment between the E-
> shaft and the
gear drive. When you built the plate & bellhousing
>
adapter for the drive, how did you verify concentricity? This is
> much harder to do than verifying the parallelism of the
bellhousing
> and plate but is absolutely vital. There is
no question that the
> drive would have soon failed if you had
continued to run it. Glad
> this showed up before
flight.
>
> Tracy (Happy to hear that Dave L. is safe!
Good flying. )
> <coil-alt coolingA.jpg>
>
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