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Thread: Birdsmouth for GIS Main Mast
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27th January 2015, 01:04 PM #91Senior Member
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Home Depot carries clear Douglas Fir in various sizes so knots are not a problem. I picked through the pile to find the lightest and straightest grain ones. Several boat builders have told me that a somewhat lighter mast could be built using the lightest 2x4s but you have to pick through a ton to find good knot free ones.
SimonSimon
My building and messing about blog:
http://planingaround.blogspot.com/
The folks I sail with:
West Coast Trailer Sailing Squadron
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27th January 2015 01:04 PM # ADSGoogle Adsense Advertisement
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1st February 2015, 05:05 AM #92Member
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Simon,
The stuff my Home Depot has is this
Much of it is fairly clear. Could certainly find enough clear ones for a mast.
But it's listed as premium pine. The Doug fir in small dimensions is pretty horrible.
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1st February 2015, 01:00 PM #93Senior Member
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The pine will be plenty strong enough and you'll likely end up with a lighter mast. I used doug fir because the stuff at our HD was very nice. I it's availability varies from store to store. The HD website does not list the sizes of doug fir lumber that are in stock at three of our local stores.
Simon
My building and messing about blog:
http://planingaround.blogspot.com/
The folks I sail with:
West Coast Trailer Sailing Squadron
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2nd February 2015, 02:01 PM #94Member
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thanks Simon.As I mentioned in my build thread, I decided the 1x2s at another local HD were Doug fir and loaded up on them. Now waiting for my scarfs to cure before I cut the birdsmouths.
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3rd February 2015, 05:26 AM #95Member
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You guys always make this stuff sound so easy--"just taper per the plans"!--when we're talking about ~6mm of taper over a 15' spar. This seems non-trivial to an amateur like me. I realize that the 0.2mm sections just kind of have to be eyed in along the greater run of the taper, but even setting up an accurate jig over that length is merely pushing the problem back a step. I still have to figure out how to taper my _jig_ a tiny, but accurate and fair, amount over about 15'. And I can't see getting that right really, much less transferring it consistently to 8 staves. Maybe I should have stuck with the box mast... .
Maybe I should try tapering before thicknessing. Then I could get two bites of the apple. But I can't thickness on the planer after tapering, so I'd have to rip to width on the table saw, which seems fraught with potential for error too.
So perhaps I should go back to trying to glass my foils. Seems less stressful in comparison.
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4th February 2015, 09:03 PM #96Senior Member
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PAR's method sounds really good. With a 2x4 on each side there is no risk of taking off too much and if you use a hand plane everything will happen slow enough for you to feel in control (or set the power plane if you use one to take of just a little bit at a time). Good luck!
Pontus
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4th February 2015, 09:51 PM #97Member
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Thanks Scooter. But getting the 2x4 shaped and positioned right seems like the challenge... Maybe I'm overthinking it. Wouldn't be the first time....
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