[Rhodes22-list] Chain plates and loos gauge.

[The Rhodes 22 Email List]

The purpose of tuning rigging tension is to optimize mast bend on every
tack.

An IMF mast doesn't bend, so forget about it.

Rick

On Mon, Jan 12, 2015 at 3:35 PM, The Rhodes 22 Email List <
rhodes22-list at rhodes22.org> wrote:

> The guilty party responds...
>
> The total load on the cabin top *is* outrageous, John. If you believe Loos,
> the forestay tension will be about 320 pounds when you've tightened the aft
> stays to about 180 pounds, the shrouds should be tightened to about 240
> pounds, and the lowers should be 240 pounds. You could make a case for
> reducing tension on the lower stays, since the Rhodes has 4 lowers - versus
> most other boats having just two. Even if you reduce tension in the lowers
> though, you still a *lot* of compression in the mast. On top of that load,
> the compression in the mast probably goes up when you've got the rail in
> the
> water, as Graham noted. (I'm looking at you here, Rummy!!)
>
> After you get done playing with the trig functions on a calculator, you'll
> find the cabin top is supporting nearly 2,000 pounds. The bottom line is
> that you'd shove the mast through the cabin top if it weren't for the
> compression post under the mast, which carries the compressive load to the
> keel.
>
> FWIW, the function of the lower stays is to keep the mast "in column".
> Translation: the mast can bow and break if there's too much compression or
> lateral load. For example, if you take a yard stick and push straight down
> on it, all will be well - until you get to 5 or 10 pounds of pressure. At
> that point, the yardstick will bow and may break. If you had someone hold
> the middle of the stick while you pushed (the job of the lower stays), the
> yardstick could carry much higher loads.
>
> We can kick this thing around till the cows come home, but if we'd like to
> get to the bottom line, we need to get General Boats to weigh in. Stan??
>
> Dennis
> Magic Moments
> Needing enlightment - the tension is killing me :)
>
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of The Rhodes 22
> Email
> List
> Sent: Monday, January 12, 2015 11:22 AM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] Chain plates and loos gauge.
>
> Case in point: somebody mentioned the Loos settings recommending 240lbs.
> If
> you did that for the inner shrouds you'd have a total 960lbs of force on
> the
> cabin top.  Does not sound wise to me and probably cause some cabin top
> distortion.
>
> Most of the load should be on the outer stays.  If you're seeing distortion
> of the cabin top under sail from the inner stays something is not right in
> your rigging.  There's too little tension on the outer stays and/or too
> much
> on the inner ones.
>
> Remember we're talking about the inner stays here...  I remember reading
> quite a while back that their primary function was as backup to the outer
> stays, so you don't lose the whole rig if a main stay mails.
> Consequently they should probably not have much tension at all.  I couldn't
> put a number on it, but I'd say take the slack out and give the turnbuckle
> another turn or so and that's all.
>
> --
> Cheers!
> John Lock
> ~~~~~~~~~~~~~~~~~~
> s/v Pandion - '79 Rhodes 22
> Lake Sinclair, GA
> ~~~~~~~~~~~~~~~~~~
>
>
> On 2015-01-11 17:40, The Rhodes 22 Email List wrote:
> > I won't go into one of my usual rants, but instead urge you people to
> > not apply a loos gauge setting to the R22. It simply does not apply to
> > this craft.  But, if you are still stupid enough to try it, I'm sure
> > the group would love to  hear about the damage you will be repairing.
> >
> > Rummy
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> >
> >
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>
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