Boom crutch measurement confirmation

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Boom crutch measurement confirmation

Postby klb67 » Thu Feb 12, 2015 10:57 pm

One of my winter projects is making a factory scissor style boom crutch for my DS II. I have my ash stock and a pattern for the sculpted top and bottom. Can someone confirm the length should be 50"? Also, can someone confirm the through bolt that creates the scissor effect should be drilled through the middle of the width, so when closed the boards are stacked evenly? I assumed so, but the diagram I have shows the hole in a location that would make the boards offset when closed-I assume the diagram I have is wrong in that regard.

Ideally I'd take some measurements with the mast and boom installed, but my boat is in winter storage inaccessible until mid April.

Thanks.
1976 DSII - #8039
klb67
 
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Location: Gibsonia, PA (near Pittsburgh)

Re: Boom crutch measurement confirmation

Postby GreenLake » Fri Feb 13, 2015 2:08 am

You need your measurements for a DSII, because of the double hull, the height above the cockpit floor is different. However, I think there is some variation in the height of the gooseneck between boats, but 24" above the cuddy deck is he maximum allowed under class rules. In any case, you either should build it a bit long and trim it to fit your boat, or wait until you can take exact measurements - if you care about, say, getting the boom to be horizontal - or at any other specific angle.
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Re: Boom crutch measurement confirmation

Postby jeadstx » Fri Feb 13, 2015 5:29 pm

Have you thought about a topping lift rather than a boom crutch to hold your boom up? I use a topping lift on my boat for use when not under sail to hold the boom up.

John
1976 Day Sailer II, #8075 - Completed the 2011, 2012, and 2013 Texas 200
1952 Beetle Boat Swan Catboat
Early Rhodes 19
1973 Mariner 2+2, #2607 - Completed 2014, 2015 and 2016 Texas 200
1969 Day Sailer I, #3229
Fleet 135; Canyon Lake, Texas
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Re: Boom crutch measurement confirmation

Postby klb67 » Fri Feb 13, 2015 5:58 pm

The boom crutch will mostly if not exclusively be used when the boat is dry moored. The past two years, I used the halyard as a topping lift, and had a tarp over the boom and cockpit, bungeed to the trailer. I figured it would be better for the boom to be supported with a crutch than relying on the topping lift all summer.
1976 DSII - #8039
klb67
 
Posts: 136
Joined: Tue Nov 27, 2012 3:08 pm
Location: Gibsonia, PA (near Pittsburgh)

Re: Boom crutch measurement confirmation

Postby GreenLake » Fri Feb 13, 2015 11:42 pm

Sounds like a good reason to have a crutch.
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