Re: Rubber lubes - general question

From: Tapio Linkosalo <tapio.linkosalo_at_helsinki.fi>
Date: Thu, 3 May 2007 19:03:50 +0300 (EEST)

On Thu, 3 May 2007, Bill Gowen wrote:

> With the heavy lubes being discussed are you supposed to wash it off
> the motors between flying sessions? I had a bad experience at USIC a
> few years ago when I made up a lot of motors with some of this stuff a
> few weeks beforehand and all broke at very low torques. I've also heard
> of mystery lubes used by Wakefield flyers that work great but destroy
> the rubber.

No need to wash off, and you could barely wash silicone anyway. It is
inert enough not to harm rubber in any way.

> Another question about the thick lubes would be how much weight do you
> add to an indoor motor when lubing with high viscosity lube? Since Fred
> flies F1D I guess the answer is not much, but I would guess you have to
> be careful.

Never weighted my indoor motors for the amount of lube, as the motors come
lubed anyway :) When making 30 gram motors, I cut the rubber to 29.4 grams
(about), add 1 gram of silicone, and after break-in cut the ends of the
knot, and if the motor is still overweight, wipe away some lube. So I
guess I have 2 to 3% of the motor weight of lube. I suppose in indoor less
is sufficient, as 2-strand motors will not rub against strands as bad as a
28-strander.




-Tapio-
Received on Thu May 03 2007 - 09:16:28 CEST