Catamaran on mattresses. Travel Tips

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Catamaran on mattresses. Travel Tips

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For fans of weekend hikes who prefer to relax on the water, the unusual option will be of undoubted interest. light catamaran, published in the Hungarian magazine "Ezermešter". This is a single-seat pleasure "boat" with a rowing foot drive, the basis of which is two beach air mattresses. They are used without changes or any refinement, therefore they retain their traditional purpose. And in order to go on a small voyage on them - for example, go fishing or just "ride" - it is enough to lay a small wooden frame on top with an ordinary folding chair attached to it, popular with summer residents and pensioners.

Since air mattresses are purchased (ready-made) products, we will dwell in more detail on the base frame of the catamaran. It is assembled from wooden planks with a section of 40x20 mm and consists of two longitudinal supports 1700 mm long and crossbars fastening them, one front 640 mm long and two more 1100 mm each. Between themselves, the supports and crossbars are connected by furniture bolts with wing nuts - for ease of assembly and disassembly. At the same time, the front and middle crossbars are fixed flat (the first is on top of the supports, the second is on the bottom), and the rear is from the bottom and edge: so that it enters the transverse gap of the inflatable balloons of each mattress. This pairing is enough to do without additional frame connections with mattresses (although, if necessary, you can fasten it additionally)

Catamaran (click to enlarge): 1 - longitudinal support (2 pcs.); 2 - frame cross member, middle; 3 - frame cross member, front; 4 - pedal (2 pcs.); 5 - thrust (2 pcs.); 6 - propeller blade pad (metal plate, 2 pcs); 7- collar of the rear cross member; 8 - clamp of the middle cross member; 9 - rowing blade (2 pcs); 10 - pedal loop (2 pcs.); 11 - bolt with wing nut (6 pcs.); 12 - frame cross member, rear; 13 - air mattresses.

After the base frame is assembled, a folding chair is installed on its middle and rear crossbar and attached with metal clamps from a steel or duralumin strip.

It remains to install the aforementioned rowing drive - two foot pedals that reciprocate two blades bent twice from thick rubber from automobile cameras. The pedals are metal plates having a hinge made of a window hinge, which, in turn, is attached to the front cross member. The plates are connected to the blades in a special way - curved (see fig.) metal rods from a bar with a diameter of 6 mm, the hook-shaped ends of which are screwed with M4 bolts For convenience assembly-disassembly pedal loops can also be attached to the crossbar using bolts with wing nuts.

The final assembly of the catamaran is carried out in shallow water near the shore: air mattresses are laid on the water, and the frame with the chair and the drive is carefully lowered and aligned with them accordingly.

To protect the wood from excessive wetting, all frame elements are carefully impregnated with drying oil and painted in several layers with oil paints or waterproof varnish.

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