OK...here's some input on the O-rings...It took me some time to figure out
how to thread the rubber thru the small hole in the O-ring...I used my
wife's needle threader from her sewing kit.
Rick Pangell
Editor of "The Max-Out" Newsletter of
The Magnificent Mountain Men FF Club of Colorado
In a message dated 2/28/2011 12:02:42 P.M. Mountain Standard Time,
carl.bakay_at_yahoo.com writes:
I have done a lot of rubber testing thanks to Goldstein's prodding during
my INAV days, testing mostLy 7 inch loops of 1/8 strip, and without
exception, those that broke did so at the knot. These knots were un lubricated, due
to the difficulty of tying a lubed knot. The stye of the knot did not
matter ... It seemed that that was where all of the stress was located.
I wrapped my loops for stretch testing around a nail, over which was slid
a piece of Tygon fuel tubing. This also allowed the knot to move, in keeping
with current FAC technology for short rubber motors in multiple-engine
planes.
Carl Bakay
Sent from my iPad
On Feb 28, 2011, at 12:46 PM, "dennisatyson" <_ddtyson_at_peoplepc.com_
(mailto:ddtyson_at_peoplepc.com) > wrote:
Here is another source for 90A durometer o-rings at a great price.
_
http://www.oringsandmore.com/servlet/StoreFront_
(
http://www.oringsandmore.com/servlet/StoreFront)
--- In _Indoor_Construction_at_yahoogroups.com_
(mailto:Indoor_Construction_at_yahoogroups.com) , Warthodson_at_... wrote:
>
>
> From what I have read & experienced, o-rings cut from plastic tubing do
not cut into the rubber any more than the wire hooks. It seems counter
intuitive, but many very experienced indoor flyers use plastic tubing for
o-rings. Personally, I prefer the hard plastic o-ring to a rubber o-ring. I find
them easier to hook up. I read somewhere that someone boiled their plastic
o-rings to remove the sharp edges, but I have never met anyone that told
me they actually do that. If the sharp edge were cutting into the rubber I
would expect most of my motors to break at the o-ring, but again that has
not been my experience.
> Gary
>
>
>
>
>
>
> -----Original Message-----
> From: Terry <jantel98_at_...>
> To: _Indoor_Construction_at_yahoogroups.com_
(mailto:Indoor_Construction_at_yahoogroups.com)
> Sent: Mon, Feb 28, 2011 7:05 am
> Subject: [Indoor_Construction] Rubber Motor O rings
>
>
>
>
> What are people using for O rings ?, I have heard of rigid plastic being
used, if so do it not cut into and damage the rubber ?, I have just cut
some thing rings from a light plastic (Ear cleaner) tube and was looking for
a way to smooth them down a little
>
> Terry
>
Received on Mon Feb 28 2011 - 11:14:46 CET