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Author Topic:   Hoisting a Revenge
Ready2Rip posted 06-04-2002 01:22 PM ET (US)   Profile for Ready2Rip   Send Email to Ready2Rip  
Need to hoist my 22' Revenge for new bottom paint. Are the eye hooks in the transom & bow strong enough to hold it? I still have over 1/2 tank of fuel, so I know it's going to be heavy.

Thanks,

Mike

Clark Roberts posted 06-04-2002 02:04 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Mike, they're strong enough! Hook onto inside ring of the transom hardware to prevent scuffing or top edge of transom.. lift straight up... no problem!!!! Been there done that... Clark... Spruce Creek Navy
Ready2Rip posted 06-04-2002 06:21 PM ET (US)     Profile for Ready2Rip  Send Email to Ready2Rip     
Up it goes!

Thanks

Jerry Townsend posted 06-04-2002 07:03 PM ET (US)     Profile for Jerry Townsend  Send Email to Jerry Townsend     
Mike - as Clark stated - lift straight up. That is, use a spreader beam - or at least, long (at least the boat length) sling cables. ----- Jerry/Idaho
peteinsf posted 06-04-2002 07:09 PM ET (US)     Profile for peteinsf    
I wonder what he is going to use to lift her?
Ready2Rip posted 06-05-2002 12:42 PM ET (US)     Profile for Ready2Rip  Send Email to Ready2Rip     
My buddies shop has a 4-ton hoist. The problem is, all of the lines will have to converge at a central point (no load distribution mechanism). That significantly increases the load on the two stern eye hooks, as we're now almost 60 degrees from a vertical pull. We have this limitation due to the overall height of the hoist.

I'd really like to get my boat painted at this shop, but I don't want to win the Darwin award ; )

Jerry Townsend posted 06-05-2002 02:25 PM ET (US)     Profile for Jerry Townsend  Send Email to Jerry Townsend     
Mike - your 60 degrees from the vertical will give you a significant horizontal load on your transom eyes. The 60 degree load arrangement gives you about 1.732 times the vertical load. Your revenge weighs around 2300 lbs - so around 1150 on the transom plus the engine and perhaps 2/3 (a wag) the weight of the fuel. With the engine weighing perhaps 400 lbs (another wag) that would give about 1550 on the transom (neglecting any fuel), or perhaps 775 per transom eye. With the 1.732 factor, the horizontal load on each transom eye would be around 1340 lbs. or 2640 lbs on the entire transom. I don't know the design limits, but that load seems significant - particularily when you will be leaving it hung for some time.

Is it possible to get an I-beam about the length of your boat and thereby load your boat in a more vertical manner?

Jerry/Idaho

Ready2Rip posted 06-05-2002 04:56 PM ET (US)     Profile for Ready2Rip  Send Email to Ready2Rip     
Jerry,

By my calculations (which are rusty from years of physics atrophe), I calculate that the force is double that of a vertical pull. I must have said, "this is crazy" a dozen times while we were rigging it, but I had a seasoned veteran assure me that it would be OK. I would definitely file this under "don't try this at home."

However, it's up on the blocks now for the bottom painter. If we can lower it back down safely I promise to never do it again ; )

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