>RebelCat 5 Update 12-20-11
If you bought the DVD, please see all
of these Updates, especially 10-27-09 and 10-28-09. They describe the new
rudder and centerboard (CB) designs that improved the
performance of my RebelCat 5 dramatically. One reason for
this improvement is that my cat is 21' long and benefits from a
large rudder to turn easily in light winds. A larger CB
also helps prevent drifting leeward.
Traffic Cones as bows - When used aft, the
PVC ring that joins the cone to the pipe need not be longer
than about three inches. However, as bows require more
strength, I suggest making this ring longer, so that more of it
enters the pontoon, making the cone more rigid and stronger, to
resist waves and chop. In that case, the pontoon pipe will have
to be sealed farther back from the opening, to allow this extra
length of the ring. How long should the ring be inside the
pontoon? I think 6" would be plenty. Those 6" will fill with
water unless filled with foam, so pack foam in the ring.
I found a better way to pack the cones themselves with foam.
On the DVD, I used white styrofoam, but closed-cell foam works
better for two reasons: it will not absorb water, and it is
First, I took out the styrofoam I had
previously stuffed in.
Using backpacking foam pad foam, which is
closed cell, I made a small cone and stuffed it
into the tip of the traffic cone.
||Then, after measuring the length
of the traffic cone that remained empty, I cut
four pieces that would fold together into a
||Using duct tape, I joined all four
into a shape that would exactly fit the traffic
||Here you can see the first cone
stuffed into the tip and the next hollow piece
Next, I started cutting scraps of foam - I
already had many, due to the odd shapes I was
cutting from a rectangular foam pad.
After packing in the pieces, I cut a disc to
cove them, to create a closed layer that ci
could then build another layer on.
||More scraps go into the layer
above the last one, and they get pressed
||Then a bigger disc to cover and
close that layer.
To seal the opening, I cut a disc of foam
and covered it with duct tape, then stuffed it
into the opening.
The completed cones were then put back on
the pontoons with screws.
The re-stuffed cones are more symmetrical
than previously, and they are less prone to
becoming misshapen from bumping something.
If these cones are used as bows, they will
perform well and also serve as bumbers in case
the cat hits something hard. Rubber bumpers on
a cat - a first!