I only had two members holding up the block. When I replaced the horizontal
plate the 2nd time (don't ask) I put in a 3rd, right between the two original
members. Just like the originals, I cut and formed the 3rd to rest on the
shoulder of the bilge sump. I used 2in thick paela (sp?) which is a mexican
wood that's dense like ironwood and very oily. Mexicans use it for fence posts
and it lasts a hundred years without rotting. It's hell to cut; broke a band
saw blade and ruined two jig saw blades. Didn't do the table saw blade much
good either. Maybe I should have found a better method for cutting???The two
originals were doubled marine plywood about 3/4in thick (1.5in total)
sandwiched between two smaller metal trapezoids (leaving a 1in border of
plywood) bolted through. They were getting soft in spots on top, but still had
some integrity, so I left them alone. No sign of distortion where they rested
on the shoulder.Used paela for the horizontal plate that the mast rests on as
well. Been two years now and it's showing no deflection with rig tuned
up.RonWild CheriC&C 30-1STL
From: RANDY via CnC-List <[email protected]>
To: cnc-list <[email protected]>
Cc: RANDY <[email protected]>
Sent: Sunday, November 13, 2016 2:51 PM
Subject: Re: Stus-List Propeller
Thanks Gary. My RSA gives +6 for a fixed two-blade prop, and other guys in my
club think a folding prop is worth even more than that. There's at least one
RSA (NCPHRF I think) that gives +12.
Thanks also for the info on the mast step. I'll go with three cross-members if
I can, while still getting a pump into that sump and not covering up a keel
bolt. Otherwise two non-rotting, non-deflecting cross-members made out of
fiberglass board, and properly designed and installed, ought to be better than
the original setup, and certainly better than my current two cross-members.
Cheers,Randy
From: "Gary Nylander via CnC-List" <[email protected]>
To: "cnc-list" <[email protected]>
Cc: "Gary Nylander" <[email protected]>
Sent: Sunday, November 13, 2016 1:11:26 PM
Subject: Re: Stus-List Propeller
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{}#yiv1369932643 Our PHRF rules give you 3 seconds/mile for a fixed prop. I
didn’t think that was enough, so went with a flex-o-fold. On the mast step, I
have three cross members under the oak block (which looks just like yours) but
do not have that big oak block assembly at all. I think some previous owner
built that thing to make up for the lack of support and the fact that the
fiberglass guys at the factory didn’t seal the bottom of the cross members,
which do a great job of wicking up any stray water in the bilge. Gary#593
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