Has anyone made a dinghy crane?

[Sailor Doug]

I built my own davits out of 2" square 3/16 6061 t6 aluminum tubing. Because of swim platform they did get long. If you start with a very light dingy at 200 lbs that creates a 1,100 ft/lb load on a single 5.5 crane. Conservative engineering would require a 4:1 safety factor, that's 4,400lbs. Load requires quite a substantial base to boat mount.

[Parmenter]

Originally Posted by Cheechako

Why would you want the crane in lieu of the davits? The davits work perfectly on a cat.

Because on my cat I cant see how davits mounted on the aft beam will work.
They'd need a ridiculously long reach.

An impression of what mine are like, similar boat but my steps are longer
Dark blue line is where the dinghy sits

[salticrak]

Any chance you could use the boom somehow?

[Parmenter]

Originally Posted by salticrak

Any chance you could use the boom somehow?

None whatsoever as it doesn't have one or a mast.

[darylat8750]

I have 2 comments.

Be sure that you have enough height above the highest obstacle to use a reasonable bridal. My friend built one that is marginal and the bridle is so short that the bridle lines have very high load on them.

If I had a cat I would look into doing something like Chris White does on his Atlantic 57. Cerulean - ChrisWhiteDesigns | SmugMug

[Cheechako]

Originally Posted by Parmenter

Because on my cat I cant see how davits mounted on the aft beam will work.
They'd need a ridiculously long reach.

An impression of what mine are like, similar boat but my steps are longer
Dark blue line is where the dinghy sits

My steps were pretty long but the davits still were no problem. No pic of yours?

[Parmenter]

Extend your bridgedeck panel 1.5 metres out past the back beam and tell me how your davits work then,.
That is what I have shown in the picture.

[Greggegner]

Garhauer has motor lifts for less than $300 with blocks and line. Not sure it is worth building your own.


Greg S/V Sweet Dreams
Pearson P385 out of Racine Wisconsin

[Parmenter]

Originally Posted by Greggegner

Garhauer has motor lifts for less than $300 with blocks and line. Not sure it is worth building your own.


Greg S/V Sweet Dreams
Pearson P385 out of Racine Wisconsin

Do they?
That fits my requirements or yours?
Link please.

add) ah, just a motor lift NOT a dinghy lift and only a short reach, so totally useless for my requirements.

[Parmenter]

Originally Posted by darylat8750

If I had a cat I would look into doing something like Chris White does on his Atlantic 57.

I looked at something similar a while back but figured it would get a bit wobbly swinging a 12 ft x 5 ft dinghy with a 15hp on the rear.
I'll revisit it again, thanks.

[Cheechako]

Originally Posted by Parmenter

Extend your bridgedeck panel 1.5 metres out past the back beam and tell me how your davits work then,.
That is what I have shown in the picture.

So the blue rectangle is a bridge deck not the dingy? OK I get it.