Jump-N-Jack

The jack-knife trailer boat

Category
Outboard Runabouts
Designer
Berthel Madsen
Published
Boat Builder's Handbook, Volume 8, 1958, p. 113
Craft Print
192

Boat and trailer in one for fishermen and campers. Row it or run a small outboard; fold it over like a jack-knife and it becomes a one-wheel trailer holding 40 cu ft of gear. Built in one piece without a form, then sawn in two, and each half floats on its own.

Specifications

Length
9 ft 7 in
Beam
3 ft 10 1/2 in
Depth
2 ft
Weight
120 lb
Capacity
2 persons (4 in a pinch)
Construction
1/4 in. exterior plywood with oak framing; built whole, then sawn in two
Power
Oars or outboard up to 5 1/2 hp

Downloads

Plan sheets 6

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