Trailer frame rebuild Ep5

A the back of the trailer,  heavy duty keel cross beams were fitted  (Frames 5,6 and 7)  These are all the same shape and level.

Up front, Frame 3 was modeled on the previous one, which had a 3" drop in the middle. I made a V beam with 3.5" drop using lighter 4mm thick rolled galvanized channel.

Frame 3 - on it's template

Frame 4 is still under construction - (It's located where the keel forefoot begins to rise up.)

Frame 4 - early stages , on its template

Frames under construction - old frame 4 used to shape new frame 4. Galvanized frame 3 tacked on.

Frame 2 (the straight easy one near front) was re-fitted with heavy channel section used.

Draw Bar begins

Placed the long length of 3x2" RHS draw bar in position, propped up at it's end. Frame one, not yet made, take to loads of the draw bars hinge join. Thinking of moving it back about a foot which should give more overall draw bar to A frame strength and make the boat easier to tilt. The previous draw bar stuck out only 3 feet from the Apex way too short for my "tray back" ute (pickup tuck) So doubled the length to 6 feet and cut the draw bar to length.

Teria's trailer frame is progressing

Found a very good trailer selection and engineering/building website from NZ (also covers Australian codes) This is the page i first came across.

Trailer Sauce - draw bar design and function.  There is allot of other very useful information and allot of pages to read. I found the galvanizing section very informative - especially the bit about pre-drilling holes in end corners so the preparatory acid bath solution can all drain out and wont cause a molten zinc mini explosion. Wish i'd found this site before actually beginning the project, some learning (the hard way) bumps would have been avoided. There's also plans for a medium sized small runabout (or sailing dinghy) trailer (a bit lighter and simpler than Teria's)

It's the festive season over here so back into it after the New Year.