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Old 17-10-2016, 07:17   #121
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Re: Max righting moment question

That brings me to the decision of bowsprit construction..dougfir (3) 2x4s ripped, planed,and epoxied is what Google turned up. I much rather 316 for longevity. should the weight concern me that much?
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Old 17-10-2016, 07:26   #122
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Re: Max righting moment question

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Originally Posted by Eastward ho 24 View Post
That brings me to the decision of bowsprit construction..dougfir (3) 2x4s ripped, planed,and epoxied is what Google turned up. I much rather 316 for longevity. should the weight concern me that much?
Carbon baby!

Back to the serious table... 316 or Al is going to be far lighter than Doug...

I need to go backwards here... missed a bit... sprit for a self tacker w/ boom don't make no sense at all...
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Old 17-10-2016, 07:32   #123
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Re: Max righting moment question

Add a sprit, move my 150% roller out to it( it's currently on the stemhead). I have the stock self tacker and boom, which will go back on the stem head. Was asking if it's worth the benefits I'd gain.
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Old 17-10-2016, 09:14   #124
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Re: Max righting moment question

Worth it, just how :-)?

Asking loosey-goosey questions like that, you're gonna get useless answers - even misleading and dangerous ones.

Ask specific, quantifiable questions, then learn enuff about boat design and sailing that you can answer them yourself, and have confidence in your answers. For example: "If I make a sprit from DF how much will it weigh?" The answer is simple: 4 inches wide, 4 inches thick 4 foot long gives a volume of 4 x 4 x 48 cubic inches = 768 CuIn. A cubic foot (12 x 12 x 12) inches = 1,728 CuIn. Dry Douglas fir weighs about 34 lbs per CuFt, so your new sprit would weigh 34 x 768/1728 = 15 lbs. Less any wood lost to tapering, so call it 12 lbs finished. Then add the hardware and you are back to 15 lbs.

Don't ever accept answers from people who can't or won't or don't show you the numbers!

Snowpetrel is right: Go for simplicity for now till you learn these things.

Next question ("reworked" from your "benefits I'll gain" comment): "If I fit a sprit and run the existing genny at 150% foretriangle, having taken the stay to the end of the sprit, will I increase boat speed 1/2 knot in 15 knots of wind compared with running the existing genny at 80% foretriangle with the stay taken to the stemhead?"

The answer is (probably) "No", but the calculations that will tell you are quite complicated. Ask the same question substituting 8 knots of wind for the 15, and the answer is (probably) "Yes".

But as Snowpetrel sez: KISS. Remember that Willy Occam is the friend of the novice sailor!

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Old 17-10-2016, 10:03   #125
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Re: Max righting moment question

Ok your right I'll just hold of on it. The mast is coming down and replacing the dismaying rigging Just wanted to gather some opinions. Hoped to get it all done in one fell swoop. Probably jumping the gun as you suggest.
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Old 17-10-2016, 10:56   #126
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Re: Max righting moment question

I have a great stainless fabricator locally, so if it were me, I'd be asking him how much to do the whole thing, sprit, pulpit and stay etc. Might be kinda pricey but in the long run...
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Old 17-10-2016, 15:03   #127
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Re: Max righting moment question

Yes I have access to a full fab shop and I tig weld stainless I was trying to figure what size tubing to use... Only thing I saw is westsail 32 uses 1 1/4 sch 40. So obviously I'd need something smaller native 3/4 or 1" ,I gotta Look into it some more. Wanted to re place my boomkin with stainless to it has puny 2x3 boards.
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Old 17-10-2016, 15:56   #128
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Re: Max righting moment question

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Originally Posted by Eastward ho 24 View Post
Yes I have access to a full fab shop and I tig weld stainless I was trying to figure what size tubing to use... Only thing I saw is westsail 32 uses 1 1/4 sch 40. So obviously I'd need something smaller native 3/4 or 1" ,I gotta Look into it some more. Wanted to re place my boomkin with stainless to it has puny 2x3 boards.
BTW if you google your boat for images, there are a bunch with sprits of course to give you an idea of what you are shooting for. Personally I would have the pulpit go out on the sprit.
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