Thanks for the input. I'm seeing some possibilities now, but none of them really look specific to hoisting a dinghy. Most are for much larger line that what I have (currently wire rope...thinking about changing to Dyneema). Also most are too long from the top of the sheave to bottom of the hook. I'm limited in length there in order to get the dinghy high enough to get over the rail. Also, none have the weight.
So I'm still looking. Any other ideas are appreciated.
How much load does it need to take?
Take a look at garhauer blocks with snap shackles. They are nice and compact and have decent working loads. I'm using some of their fiddle blocks for overhead lifting of a small whaler that is approximately 700 lbs.
https://garhauermarine.com/catalog_process.cfm?cid=16
Dinghy and motor are about 500 lbs.
That is the closest I've seen to what I need. Is that shackle going to be able to lift a 500# dinghy. The working load says yes, but it doesn't look that substantial.
You can get those with a safe working load up to 3500#. That should be plenty for a 500# dinghy and motor combo. Your crane will fail before the block/shackle will fail.
Make your own using an anchor swivel?
I'm think that might be the way to go. I don't see how to include the big stainless steel weight that I have above the hook now. These block/shackles are about 12 oz. Do I need more weight on the line than that?
Make your own using an anchor swivel?
I have the setup the OP is looking for but it is attached to my davit crane. And sure, one can make his own although the one shown in post 1 is HEAVY. I find that its weight is needed to pull the wire from the wench when lowering the hook. I doubt that anything light weight would be desirable.
Anyone know where I can find something like this? I've been googling various combos of dinghy/Crane/davit/hook/pulley all evening with no success.
Thanks. View attachment 63838
Wire as in a wire cable or even the lightweight and slippery dyneema?
I have the setup the OP is looking for but it is attached to my davit crane. And sure, one can make his own although the one shown in post 1 is HEAVY. I find that its weight is needed to pull the wire from the wench when lowering the hook. I doubt that anything light weight would be desirable.
OK Dave..........no clue here what it should be called other than the "thingy stuff" on my crane is not fabric
Mike-- try calling Marquipt, I believe they still use this assembly for their davit cranes although the sheave may only wire rated. Still worth a call.
You apparently have wire.
That is why you need a heavy weight clip.
Change to a synthetic line and you can use a lighter weight clip.
You don't want to go to light though. Or it can blow around in the wind and damage your boat or someone's head.
Capt.Bill-- I wish it was that simple. There is a limited space inside my crane for the winch so a larger drum needed for a line is prohibited. Another problem with line is the larger diameter will require a greater number of wraps on the drum.
The greater the diameter of the pulling drum resulting from wrap buildup changes the pull length/drum turn placing a greater load on the pulling motor. Wenches are popularly rated for the first wrap on the drum and the rating quickly diminishes on each succeeding wrap.