Assuming one rivet is strong enough to do the job the fact that they use
three would indicate to me that not even the manufacturer doesn't trusts
them. Perhaps a second for backup, but three.....? I would guess that
cheaper is the answer. Lets get on with it - past time to cut the thread.
----- Original Message -----
From: "Dick Green WC1M" <wc1m73@gmail.com>
To: <towertalk@contesting.com>
Sent: Saturday, February 19, 2011 12:07 PM
Subject: Re: [TowerTalk] Force12 rivets
>I have four Force12 antennas, including a C3E, and have never had a rivet
> failure. I'm not an engineer, but it seems to me that the rivets they've
> chosen are more than adequate for their smaller antennas. On first blush,
> it
> sounds like the hole was too large or the rivet wasn't pulled through all
> the way. That said, my recollection is that most of the tubing joints in
> my
> C3E use a row of three rivets. It's unlikely all three rivets at any
> particular joint would fail. I don't have the manual handy, but I vaguely
> remember that the joints at the element tips use a single rivet or maybe
> even a screw, probably because length adjustment may be necessary and you
> wouldn't want to have to remove three rivets to do that. If that's where
> the
> failure is, then I'd bet it's a single rivet or screw.
>
> I would hesitate to use rivets 90-degrees or 180-degrees apart. The joints
> in Force12 antennas are designed to be secured on one side of the tubing
> only. If you drill and install additional rivets, you could pull the inner
> tubing out of round and cause it to get stuck in the outer tubing, making
> disassembly difficult or problematic.
>
> 73, Dick WC1M
>
>
> -----Original Message-----
> From: K8RI on TT [mailto:k8ri-on-towertalk@tm.net]
> Sent: Friday, February 18, 2011 3:30 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Force12 rivets
>
> On 2/18/2011 1:27 PM, Larry stowell wrote:
>>
>> Barry
>> "Single rivet"? My C31XR had 3 per joint.
> My C19XR and an older style WARC-7 also have 3 and none of them are
> blind. They look like conventional pop rivets in a row on the bottom
> with about 3/4" spacing at each joint.
>
> 73
>
> Roger (K8RI)
>> 73 Larry K1ZW
>>
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Barry
>> Gross
>> Sent: Friday, February 18, 2011 12:02 PM
>> To: towertalk@contesting.com
>> Subject: Re: [TowerTalk] Force12 rivets
>>
>> Thanks for all the advice! What I think I'll eventually do when I get
>> the
> antenna down, is drill
>> perpendicular holes one inch proximal (boomward) to all the existing
> single rivets and add a second
>> rivet.
>>
>> 73, Barry N1EU
>>
>> On Fri, Feb 18, 2011 at 4:07 PM, Mickey Baker<fishflorida@gmail.com>
> wrote:
>>
>>> Careful drilling "perpendicular holes" - better to go down the length
>>> of the tubing a few cm so as not to provide a weak point in the element.
>>>
>>>
>> _______________________________________________
>>
>>
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>
>
>
>
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