Sponson Assembly:
These are the most critical parts of the boat, and you guessed it, the most difficult part of
the build as well! No need to panic though, it’s pretty straight forward if you follow the
steps carefully and work with attention to detail and accuracy.
· Starboard = right side of boat as viewed from the rear.
· Port = left side of boat as viewed from the rear.
What you need to start the sponson build is:
- the four (4) ¼” thick sponson frames (sides/stringers)
- the four (4) sponson tubes ( ½” O.D.)
- two (2) of the foam blocks
For this first step, the sponsons will be upside down on the build table. It is very
important here that you use the correct pieces in the right place, as they look alike but
they aren’t all the same. Of the four sponson frames, one stands out above the rest. That
is the one with three holes in it for the turn fin. This is the inside piece (nearest to the tub)
of the starboard sponson. Now in the other three pieces, find the one that has the same
height as this piece. That will be the inside piece for the port side sponson. The other two
pieces are the outer pieces for both sponsons…these two actually are the same.
It’s pretty easy to see which are taller if you run the sponson tubes through them all as
shown in the picture below.