The Hillman Imp used a rubber doughnut drive shaft coupler that would be
excellent for this purpose, especially for larger arrays. Unfortunately that
car has been out of production for a long time now. I believe that the
couplings used on early Lotus Elans would be worth a look as well
http://www.hillmanimpspecialists.com/pricelist19.htm
http://www.boatdesign.net/forums/jet-drives/dateline-bikini-shaft-coupling-15676.html
Mark N1UK G3ZZM
----- Original Message -----
From: "Pat Barthelow" <aa6eg@hotmail.com>
To: <towertalk@contesting.com>
Sent: Sunday, 26 October, 2008 9:22 AM
Subject: [TowerTalk] Killer Springs; Spring-Eq plate/Leeson
>
> Dave Leeson, W6NL designed a great solution to the rotor-to- Beam shock
> absorber problem, using a rubber BMW steering shaft coupler....But that,
> as you say, was a different cart of apples than the Killer spring-guy wire
> idea.
>
> I have Leeson's Masterpiece, "Physical Design of Yagi Antennas" (covering
> a lot on towers, also) in storage, somwhwere, and miss thumbing through it
> once in a while. A real gem. It should be a reference in the Bookshelf
> of any Tower owner/user.
>
> Manufacturers ought to incorporate mention of same, so that Leeson's
> great idea can meet the high standards of Steve's prime directive.
>
>
>
>
> All the best, Pat Barthelow AA6EG Skype: sparky599aa6eg@k6bj.org
>
> http://www.jamesburgdish.org
>
>
>> From: wa3gin@comcast.net
>> To: K7LXC@aol.com; towertalk@contesting.com; draxfelton@gmail.com
>> Date: Sun, 26 Oct 2008 08:24:48 -0400
>> Subject: Re: [TowerTalk] Spring between equalizer plate and earth anchor
>>
>> I remember some folks using springs like this in their rotor to mast
>> connection ala Back Lash....maybe somewhere down the line the story was
>> mis-understood and the coils migrated to guy cables -- scary!
>>
>> 73,
>> dave
>> wa3gin
> ----- Original Message -----
> From: <K7LXC@aol.com>
> To: <towertalk@contesting.com>; <draxfelton@gmail.com>
> Sent: Sunday, October 26, 2008 7:43 AM
> Subject: Re: [TowerTalk] Spring between equalizer plate and earth anchor
> In a message dated 10/25/2008 9:26:45 P.M. Pacific Daylight Time,
> towertalk-request@contesting.com writes:
> A local ham told me to get some heavy duty hood springs from a
> 1950-1960's car and put them between my guy wire equalizer plates and
> earth anchors.
> This is to "prevent backlash" during storm force winds.
> Any thoughts on this?
>
> You bet. This is a particularly stupid idea. Is there anything like
> this that's even suggested by the manufacturer? No way.
>
> By backlash, I assume he's talking about slack in the guys. If the guys
> are properly tensioned, there's no need to "prevent backlash" because
> there
> is no slack on the guys.
>
> And besides, you've got no idea what the strength of the hood springs
> are. How would you attach them?
> In all things the LXC Prime Directive still trumps amateur old wives'
> tales: "DO what the manufacturer says." The converse is also true "DON'T
> DO what they don't tell you." And congratulations for checking on
> TowerTalk before following this
> very poor - and potentially fatal - advice.
>
> Cheers,
> Steve K7LXC
> TOWER TECH
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
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