Self-propelled monoski. Drawing, description

PERSONAL TRANSPORT: GROUND, WATER, AIR
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Self-propelled monoski. Personal transport

Personal transport: land, water, air

Directory / Personal transport: land, water, air

Not so often on winter paths and slides you will find home-made snowmobile equipment for children. Basically, these are well-known industrial structures of the "Chuk and Gek" type. Some have low-power internal combustion engines. For all their obvious advantages, they also have disadvantages. However, avoiding arguments on the topic of "pros" and "cons", let's get acquainted with the unusual layout of the mono-ski sled with an electric motor.

The mono-ski is a light elongated body with smooth contours, in the lower part of which there is a tunnel with an electric caterpillar undercarriage. The latter distinguishes this unit from common snow scooters and significantly expands its capabilities. So, our sleds carry themselves uphill.

The ski is controlled by changing the position of the driver's center of gravity. Braking is by feet. At the same time, many muscle groups are included in the work, which makes it possible to classify the machine as a sports simulator.

The electric motor DV1 KM or similar is used as the engine. Even better is to use a car starter. True, it should be significantly improved (see "Model Designer" No. 4 for 1996). The power source is rechargeable batteries of the STsD-12M type and high-capacity paper capacitors (0,5-4 F), which are fed from the motor-generator in idle mode (descent from the mountain). If we put high-capacity quasi-molecular capacitors, then the batteries will practically be unnecessary. The electrical circuit is controlled by a conventional breaker or thyristor unit.

The hull of the monoski is made in the traditional "ship-model" way on a slipway. The frames, up to the third inclusive, are made in one piece, and the subsequent ones are with a cutout for the tunnel. The "deck" plating has technological windows designed for access to the inside of the hull during the installation of the running gear. To keep snow out, the front windows are protected by tight-fitting covers, while the rest are covered by the seat.

After assembling the case, its outer and inner surfaces are covered with two or three layers of thin fiberglass impregnated with epoxy resin. Holes were made in the side walls of the tunnel, corresponding to the holes on the sidewalls of the undercarriage (middle row).

The control knob (if you can call it that) is made of soft sheet aluminum and is fixed to the body with a foot-pipe, the ends of which are covered with a shell (a tube from a plastic hoop).

Mono-ski (click to enlarge): 1 - body, 2 - three-position push-button motor operation mode switch, 3 - handle (ALZ, sheet s2,5), 4 - seat upholstery (foam rubber, leatherette), 5 - seat body (s6 plywood) , 16 - driving pulley (D7), 1 - electric motor DV8KM, 16 - driven pulley (D9), 10 - footrest shell (kapron), 16 - footboard (D14, pipe 2x11), 3 - cover (plywood s12), 13- caterpillar (rubber fabric), 10 - stringer (pine, rail 10x14), 3 - hull skin elements (s15 plywood), 3 - rear frame (s16 plywood), 17 - support rollers (kapron), 16 - spacer (D8, bar Ø 18), 5 - M14 bolt for fastening the undercarriage to the body (19 pcs.), 08 - track roller shaft (StZ, bar 20), 3 - frame 3 (plywood s21), 5 - track tensioner attachment assembly (M22 nut, washer), 10 - transverse beam (pine, rail 10x23), 24 - screw, 25 - drive roller shaft (StZ), 26 - sidewall of the chassis, 36 - drive roller (nylon, rod Ø 27), 3 - pin (StZ , rod Ø 28), 29 - bushings (brass), 520 - drive belt (10x6xXNUMX)

Self-propelled monoski
Schematic diagram of the motor connection

The drive and running gear of the monoski (the caterpillar is conventionally not shown) (click to enlarge): 1 - bumper (rubber), 2 - footboard, 3 - handle, 4 - switch, 5 - lining (linden, rail 25x10, L190), 6 - body, 7 - seat, 8 - capacitors, 9 - battery, 10 - electric motor, 11 - drive roller, 12 - sidewall (D16T, sheet s2,5), 13 - bolt M5, 14 - track tensioner, 15 - spacer, 16 - screw M4, 17 - engine mounting bracket (D16T, angle 20x20x2,5)

The seat is made of foam rubber and leatherette and is installed on the cover of the battery compartment.

The undercarriage consists of an electric motor mounted on two metal sidewalls, a drive roller, road wheels and a caterpillar. The sidewalls have three rows of holes: for the shafts of the track rollers (lower row), for the M5 bolts securing the undercarriage to the body (middle row) and for the spacer screws (top row). In addition, in the rear of the sidewalls there are mounting holes for the drive roller, engine and a bracket for mounting it.

The caterpillar and its lugs are made of rubber fabric from a kayak. As rollers, rubber rollers from a household simulator for the muscles of the back and legs were used, but you can make them out of wood.

It is better to start assembling the undercarriage by installing a drive roller with a shaft between the sidewalls and fixing the engine to them. After that, the sidewalls are fixed with struts (but not completely), the shafts with the track rollers are inserted, and only then the screws of the struts are finally tightened. When the structure has become rigid, a caterpillar is put on the rollers, and a belt is pulled over the pulleys. The ends of the tracks are glued together and pierced with metal clips for reliability. In this form, the undercarriage is inserted into the hull tunnel and fastened with M5 bolts. The caterpillar is tensioned using a spring device on the third frame due to the displacement of the front track roller.

After connecting the motor to the power circuit, all electrical connections are carefully insulated and covered with a moisture-proof varnish.

Of course, this is one of the possible design options. When building a monoski, we advise followers not to repeat it literally, but to creatively develop the ideas embodied in it, continuing the search for new solutions.

Author: R.Singatulin

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