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Below is Tracy's response to my question about using metal
lock nuts on the smaller bolts holding the redrive to the mounting plate.
As Rusty suggested, makes it difficult to accurately know much "Clamping" torque
vs "turning" torque you have applied. Tracy's specifically mentions prop bolts
(I think he may have meant the gearbox bolts), but it would follow that he did
mean prop bolts, then all the more reason not to use the metal lock nuts
on the smaller gearbox mounting bolts.
So I will stick with Tracy's recommendation on the small
gearbox bolts.
No, power had not returned at the time he sent the e mail,
he indicated he thought it would be several days before they had power
restored. He was using his laptop (and conserving its battery).
Otherwise, they made it through the storm in good shape.
Ed
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
Sent: Thursday, September 09, 2004 11:20 AM
Subject: Re: Metal Lock Nuts on Redrive??
Ed,
Only thing I had against the metal locknuts was that they have such high
friction that they made it difficult to accurately torque the prop bolts.
Tracy
----- Original Message -----
From:
Ed Anderson
Sent: Tuesday, September 07, 2004 11:33
AM
To: Tracy Crook
Subject: Metal Lock Nuts on
Redrive??
Tracy,
As you are aware a common
school of thought is not to use nylon locknuts forward of the FW due to
elevated temperatures. Certainly some places exposed to high heat would
indicate the use of metal locknuts, but many other places will undoubtedly
never see 250F (which appears to the operational limit of the nylon/plastic
locknuts).
The question I have is do you see any reason not
to use them instead of the Nylon locknuts that hold the Redrive casting to the
mounting plate. I realize that you consider the nylon type more than
adequate but was curious as to whether you had a reason that you would
recommend not using the metal lock nuts.
Thanks
Ed
Ed Anderson
RV-6A N494BW Rotary
Powered
Matthews, NC
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