Bill that is the same technique I use although for larger motors mostly -
I go to 1/8" occasionally. When I started I tried a number of different
knot styles, including tying the ends with thread or using a drop of CA
on the ends, and finally settled on the double overhand knot. I began
being very careful to reverse the direction of the separate knots and
since have given up worrying about it all and I don't think I've ever had
a knot come loose. It is important to lubricate the knot area liberally
before pulling on the knots - I find that a liberal dose of saliva does a
fine job (In other words just spit on it ! <G>)
LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
On Fri, 27 Apr 2007 15:21:07 -0400 "Bill Gowen" <b.gowen_at_earthlink.net>
writes:
> I maybe misunderstood this technique when it was first described, but
> I do it a little bit different. There is a possible disadvantage in
> that the rubber is subjected to more stress.
>
> Lube the untied strip and put 2 o-rings on.
> Cut the strip to the exact weight that you're looking for.
> Tie one overhand knot as close to end as possible and pull tight.
> Move this knot as close to the end of the motor as you dare by
> pulling the strands apart inside of the knot.
> Tie a second overhand knot inside of the first one and pull fairly
> tight.
> Pull the second knot into the first one.
>
> I don't reverse the second knot and my knots don't come loose. I
> don't fly F1D so can't say how well this would work for F1D motors
> that are stressed to 99.9% of maximum.
>
> ----- Original Message -----
> From: Fred Tellier
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Friday, April 27, 2007 1:52 PM
> Subject: Re: [Indoor_Construction] Making motors to weight...
>
>
> Its called the double overhand knot, the advantage is that you can
> adjust the weight by tying a second knot and cutting off the old
> one, in fact you can tie only 1/2 knot if only a little over. The
> trick is reversing the direction of the knots so they lock together,
> the motor can be tied with lube applied and no CA is needed on the
> knot.
> Check this link http://cloudbustermac.tripod.com/knot-page.htm
>
> Fred Tellier
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
Received on Sat Apr 28 2007 - 07:20:56 CEST