Hey Doug... how's life?
"it's me" <dougking
...@yahoo.com> wrote in message
...
On Jul 17, 2:31 pm, "barret bonden" <supp
...@networks-cc.com> wrote:
> Spreader tip is 2 inches too far forward ( a replacement spreader) . How
> to
> calculate torque at the mast brackets , and what to expect if I sail her
> like this ?
> I matched the holes and tip on the old spreader exactly as I drilled the
> new
> ones. I noticed the old port spreader had more for and aft play than the
> starboard. On examination this was due to wider holes for the pins ;
> clearly
> these had worked open during 38 years. I ran the drill through more and
> added some slop but was warned off adding enough, it seems. Essentially I
> trusted the center points of the old spreader holes; wrong.
> As I look up the mast from abeam on the port side, and hide the mast head
> with the spreader, the shroud clearly runs forward to the chain plate from
> the spreader, unlike the port side.( all in line there)
> The pins are steel, the spreader aluminum; does the mast get a dimple if I
> sail her ? Do the pins give ? Do the pins open some nice harmless slop in
> the aluminum ? ( 1/8 inch thick , with welded 1/8 inch plates as support
> out
> 5 inches from the mast on the inside - so the pins go though 1/2 inch of
> metal. (these spreaders are rectangular "tube" 3 inches by 1.5 by 41
> inches
> long))
> Do I run up the mast, pull off the spreaders and drill out the holes (on a
> calm day!) Is it a mistake to add more "slop" ? Do I have another made and
> bring the mast down to put it on ?
This is a problem, yes. You should probably not sail the boat like
this, because the spreader angled forward instead straight athwartship
or slightly aft will push the mast out of column in the wrong
direction. Masts are generally designed to have a slight fore/aft bow,
not a aft/fore bow!
The spreader will not dimple the mast if there is a reinforcement
plate or a compression bar, as there often is in well-built boats. If
the spreader has not dimpled the mast before, it almost certainly
won't now.
Fixing it.... I would see if I could find a welder who can fix the
holes cheaper than getting a new spreader. Make a template to hold the
spreader in the position you want before drilling the holes this time.
Regards- Doug King
--
"j" ganz @@
www.sailnow.com
