Re: M_Boats: Crane launching - less scary than I thought!
Matt, Do you use a spreader bar/frame when lifting the boat? Jerry, what is your take on this? Might not be necessary due to the relatively low weight of the boat. Jus' wunderin' GO In a message dated 3/19/2009 3:51:08 P.M. US Mountain Standard Time, matt.marx@cox.net writes: Like most things, the lead-up was a whole lot more scary than the actual event. I moved my M17 from wet storage to dry storage (mast up on the trailer) recently, where launching is done from a hoist. I've been back and forth from the water to the trailer a few times now, with very little drama. Leading up to the event, I called Bob E and asked him what he thought - should I lift from the toe-rail? Add lifting points into the deck or cockpit somewhere? A sling? Straps, rope or wire? Thanks, Bob, for the advice. I went with an under-the-boat rope sling, like you can see used on Strawanza on the photo page. I used some Endura braid from New England ropes, 10mm, (10,000-lb breaking strength and <1% stretch at 30% of max) and made a couple of lifting lines that terminated in eye spices. The eye splices retain 100% of the line strength, while bowlines only 45%, according to the manufacturer's website. One under the bow, one under the stern, and voila -- oh yeah, had to move the backstay out of the way, which a couple of quickpins made very easy (I tighten the topping lift down to the toe rail to keep the stick upright). Finding a balance point was easier than I thought it would be, with the keel weight below the lifting points. The lifting lines can move fore or aft quite a bit and the boat will still stay level. If you are thinking of lifting/launching your '17 this way and want more info, I'll be happy to chat. Matt, M17 Lily San Diego _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats Remember, there is no privacy on the Internet! **************Feeling the pinch at the grocery store? Make meals for Under $10. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood00000002)
Hi Gary, No, I haven't, and that's a good question. I think /hope I made the lines long enough (the hook is about head level when I'm standing in the cockpit) so that the turn over the hull-to-deck joint is shallow enough to keep the line happy, and of course use plenty of chafing protection there. That doesn't solve the problem of compression loads on the hull at that point, which are probably significant. Hmm. Something else to worry about. Matt ---- GILASAILR@aol.com wrote:
Matt, Do you use a spreader bar/frame when lifting the boat? Jerry, what is your take on this? Might not be necessary due to the relatively low weight of the boat.
Jus' wunderin' GO
participants (2)
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GILASAILR@aol.com -
matt.marx@cox.net