I saw one on eBay that came out of Alaska, made of 2" PVC pipe and
fittings, formed into an inverted "A" frame, one for each side. At the
pointy corner, a hole drilled thru for an axle, and using wheel barrow
wheels. I bought the PVC pipe and fittings, cement, and axle at Lowes
for under $20.00, and the 2 wheels on eBay for $22.00 inc. shipping.
Already had some web strapping.
I made mine in about two hours of cutting PVC pipe with circular saw,
quickly gluing together with plumbers cement. Drill the axle hole at
the point of the "A" for the Axle thru the heavier right angle fitting.
Once assembled and drilled, I filled both frames with expanding foam
injected through the axle hole, and then redrilled through the foam for
the axle . The axle is made of threaded steel rod, with an aluminum
tube around it, cut to length, with a locking nut on one end, and
wingnut on the other for easy dissasembly.
With nylon straps forming a cradle between the "inverted A frame"
sides, the boat is strapped on to clear the axle, but maintain low
center of gravity, and located fore and aft, for balance. The big soft
tires, can handle rough or soft terrain, without jarring the loaded
boat. When assembled the whole setup floats. Can all be dissasembled by
one wing nut.
I use this on Folbot Super, which has a fairly rigid keel, and I don't
know how rigid Royalex is for lifting and support in center. I am
considering using my mast as a keel support, since I've already got it
along with me. I would consider using some longer pieces of oak board
attached to the center of the axle, to provide support to the keel.
These are strapped to the canoe. They could also be extended clear
beyond the bow, for a handle, or tow point behind mountain bike, lawn
tractor, snow mobile, etc.
And that's another reason they call me, Tinkerntom
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