You need to look at engineering challenges this was my list and happy with results.
Size dingy and motor
to suite your boat. I have a 3.5 aluminum
floor with 4hp motor. (36 foot boat)
I can store dingy in locker for off shore.
I sized davits
so dingy was just against stern rail when hoisted. This means it comes up at a bit of a angle from when it is in the water
. I have a reverse angle with swim platform to over come. I set lift
point 18" in from a vertical lift
Dingy should not be way up in the air this really screws with your caps ratio. All masses need to be as low as possible. My preferred height is the top is even with the stern rail.
Lift points in dingy should be low, I have two at the very bottom of transom and two in the floor near bow. This allows short linings between dingy and davits
if your davits are as low as possible.
Combination makes it easy to cross tie dingy when it is hoisted, my dingy does not move.
I use 4:1 blocks on motor end and two 2:1 on bow. Each line is feed through a sheet stopper and positioned so I can use jib
winches to assist with lifting. No safety
knots at the ends, in a emergence all lines must be released quickly to abandoned dingy, better engineering and safety
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