Plum
Well-known member
Nice job! Thanks for sharing. How much shorter are the legs than the keel? You obviously want to allow the keel to settle into a sandy bottom before the legs take too much load versus too much heel on a concrete hard.Our boat weighs 8.5t.
I used 2 3/4" heavy walled alum. pipe; wall thickness is 3/8". The legs are 7' long and joined in the middle with a sleeve near enough the inside diametre with a min of 2.5 the diametre overlap per side. Use a pin or bolt to hold the halves together.
Add steps to suit on one side, if desired. I used 15mm stainless threaded rod, holes drilled all the way through the tube with nuts to hold in place. Cover with water hose for comfort, washer and acorn nut on the end so you don't slip off the end with your foot.
The hull fitting is made from solid alum. bar, drilled and machined ( read belt sander) to shape. It is held on by 4x M10 SS bolts with a 3/4" ply backing set in epoxy on the inside of the hull. The top pin is a 1" SS bolt with the head removed and a kerf (recess) machined (read angle grinder) into the end. The pin is held in place by a u-shaped piece bent of 4mm rod that fits through the holes in the fitting and catches the recess in the pin.
The pads are two layers of 3/4" ply, 8x8" and simply screwed to a short length of angle bar.
Aluminum can be easily worked with common wood working tools.
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