Re: aluminum spinner - ACS SN-4?

Bob Farnam <bfarnam@...>

As another point of info regarding the use of tubing on the front spinner
bulkhead, I also had failures when I used Tygon tubing. When I switched to
polyurethane tubing, the problems went away. Urethane has much higher cut
and abrasion resistance. I have about 250 hours on the urethane and it still
looks good.

Bob F.
EAA Flight Advisor

-----Original Message-----
From: []On Behalf Of
Jim Patillo
Sent: Thursday, January 12, 2006 9:31 AM
Subject: [Q-LIST] Re: aluminum spinner - ACS SN-4?


FYI, I've been using an aluminum spinner, aluminum backing plate and
aluminum front bulkhead (wrapped with small diameter black rubber fuel
hose)for 700+ hours now and have never had a problem. The front
bulkhead/rubber hose to spinner is a fairly snug push on fit.


Jim P.

P.S. I've now converted the outer bushings on my ailerons and elevators
from steel on steel bushings(factory)to Rulon on steel. It completely
eliminated the up/down slop found on most all Q's. The controls are
extremely smooth. I will keep everyone informed as I complete a 1 yr.
test period.

-- In, shoskins@m... wrote:
> Apparently the plate/tubing combination was not rock solid and some
> occurred. This movement flexes the back plate and develops cracks.
The cracks
> appear as very thin black lines on the backplate, often around the
> circumference of the crankshaft flange.
> Sam

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