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ContinuousWave: Whaler Performance
sling for a 17 foot montauk, dimensions needed please.
|Author||Topic: sling for a 17 foot montauk, dimensions needed please.|
posted 01-27-2003 07:43 PM ET (US)
I need some specific dimensions on a 3 point sling for my 17 foot montauk. I want to be able to launch off a pier. Thanks
posted 01-27-2003 08:41 PM ET (US)
Go to the archives. I measured mine and
posted it here.
posted 01-31-2003 11:42 AM ET (US)
A good thread on this is
posted 01-31-2003 02:07 PM ET (US)
The subject of three point slings has come up previously as mentioned above - and will come up again. In an effort to provide some generic guidance on three point slings, I offer the following.
As I have mentioned previously, do not use rope as the stretch of the rope sling can upset the balance and result in dropping the boat. Instead, use vinyl coated cables (1/4 - 5/16 and perhaps 3/8 for the heavier boats) with cable guides (to prevent sharp bends in the cables) and double clamp each cable end. The cable slings will cost a little more, but will do the job much more safely.
The boat will be horizontal if the c/g (center of gravity) is directly under the common lift ring. However, we generally do not know the location of the c/g. Because of this uncertainity, we need to provide some means of adjusting the length of at least one of the sling cables - and a good way to provide the adjustment is to use a length of chain with a couple of clevises. Because of the unknown c/g, I assume the c/g to be located forward of the transom by one third of the boat length.
There is also a need to provide clearance for the console and for this calculation, I assume the common lift ring is located above the level of the lift points by one third of the boat length.
With these assumptions, each of the two aft cables should be:
long, and the bow cable should be:
long. The Sqrt above is the square root.
To provide adjustment in the bow cable, I suggest making the cable 80 % of the above length and provide a chain about 40% of the above length.
As an example and considering a 17 foot boat, each of the aft cables should be:
Hopefully this will help. ---- Jerry/Idaho
posted 02-05-2003 01:35 AM ET (US)
I launch my montauk out of Pt Arena for abalone/rockcod/salmon/crab. They use a hoist. Owner of the boats must provide there own slings.
My lengths are: (1-front at 10 feet) (2- rear at 8 feet).
You can order the slings at McMaster-Carr.
You can purchase the shackle there too or you can buy it at west marine or orchid supply hardware.
Ken (17 montauk)
posted 02-05-2003 01:45 AM ET (US)
Oh I forgot to mention. You got to tell them if you want a FLAT EYE AND EYE or TWISTED EYE AND EYE.
Only difference is that the twisted is easier to put onto the hook.
The flat eye to eye is easier to store.
Ken (17 montauk)
posted 02-05-2003 08:45 AM ET (US)
posted 02-15-2003 07:41 PM ET (US)
thanks for all your help i ordered the sling from mcmaster carr at two 8's and one 10. boston whalers are the best!
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