Aligning Stem Molds

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rmoffat
Posts: 12
Joined: Fri Aug 08, 2014 9:11 am

Aligning Stem Molds

Post by rmoffat » Wed Jul 22, 2015 10:22 am

I'm a first time builder, all set to start my True North 19'3. Was attempting to align the stem molds on strongback last night, with string line in place, the bow stem mold seems to line up nicely with reference lines on strongback. However, when I adjust the stern stem mold to get the string line to line up with station mold and down centre line on strongback, the stem mold is now offset from my reference lines/centre line, on strongback by just shy of 1/8". The stern stem mold has a small bend in it. I can twist it with my hand to get it all to line up, but there's not much room to brace it. My question is, can I split the difference (1/8') and live with it or should I just make a new stem mold?

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Jim Dodd
Posts: 1178
Joined: Wed Feb 08, 2006 11:08 pm
Location: Iowa

Re: Aligning Stem Molds

Post by Jim Dodd » Wed Jul 22, 2015 11:07 am

First, welcome aboard ! There is so much good information here ! I wish I'd had it when I first started building 25 yrs ago !

I'd say split the difference, and live with it. 1/8" in 19'+ is pretty small. I'd bet you could shim one side of the strong back and get a bigger variation.

Good luck !

Jim
Keep your paddle wet and your seat dry!

rmoffat
Posts: 12
Joined: Fri Aug 08, 2014 9:11 am

Re: Aligning Stem Molds

Post by rmoffat » Wed Jul 22, 2015 12:19 pm

Thanks Jim, I wasn't sure what impact it would have...in my mind, I said the same thing as you, 1/8" over 19' is pretty close. Being over tired with weary eyes, is not the best time to try an eyeball everything into alignment, so I just had to walk away last night and ask the question today, to put my mind at ease.

Thanks Again,

Rob

alick burt
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Re: Aligning Stem Molds

Post by alick burt » Wed Jul 22, 2015 1:59 pm

Hi Rob
You might try screwing a batten to the side of your stem mould to take out the bowing.This could be planed to a slight curve to make it pull the way you want it to or you could put shims on it.It could be screwed on anywhere where it won't conflict with your strips and removed if necessary/possible whilst stripping once the first few planks have been fitted.
Cheers
Alick

rmoffat
Posts: 12
Joined: Fri Aug 08, 2014 9:11 am

Re: Aligning Stem Molds

Post by rmoffat » Wed Jul 22, 2015 4:13 pm

Hi Alick,

Thanks for your input. I thought I might try to straighten mold out with a bracket/batten before securing mold to strongback, although tight space limits what I can use. After that I'll just get it as close as I can.

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