In the northern regions of Russia in winter, the only means of transportation is a snowmobile. But not everyone can purchase a branded model, and certain categories of citizens need a non-standard design. In both cases, the solution is to make a snowmobile with your own hands.
It is necessary
- - purchased units and spare parts;
- - welding equipment;
- - pipe bender
First, sketch out the intended design of the snowmobile. In this case, provide for two component parts of the device: the slave and the master. The first should consist of runners, steering column and shock absorbers. The second part should contain the power plant, frame, drive and driver's seat. However, if necessary, you can change the design, more adapting it to the performance of the intended tasks.
Identify parts and assemblies of the snowmobile that you cannot make yourself. Purchase them and roughly estimate the location of the units on the snowmobile, the dimensions of the structure and its individual parts. Approaching the layout professionally, make a plaza - a life-size model of a snowmobile from plywood or thick cardboard. Make mock-ups of all purchased parts, a mock frame and assemble a plaza from this. After that, determine the size and location of the parts that you intend to make yourself.
Self-fabrication of the frame presupposes the obligatory presence of a pipe bender, welding equipment and appropriate skills. If all this is not there, order the manufacture of a frame in the nearest workshop according to a previously drawn drawing. To make the frame yourself, start by choosing the necessary pipes. Prefer piping removed from motorcycle frames to plumbing. Special frame pipes are generally more durable.
Bend the pipes on the bender as needed. Assemble the frame by spot welding the parts before welding. Pre-fit the frame and snowmobile attachments. This will avoid design errors. The final welding should be carried out with a single seam, preferably without gaps or other imperfections. Weld on the brackets for the engine, runners, wheel drive, seat, steering column and other parts.
Make the runners in the form of two wide skis. Weld the steering column and secure the runners to it with the swivel brackets. A more complex option involves the use of shock absorbers in the ski suspension. If the design of the snowmobile provides for widely spaced front skis, then lever from the Ural motorcycle are more suitable as shock absorbers. Attach controls from any motorcycle model directly to the handlebars.
Attach the engine and gearbox to the second part of the snowmobile. Take them too from any light motorcycle. Use self-made low pressure tires for the rear wheel (or wheels). They can be made from suitable rims and air tubes for car tires. When inflated, they will be good low pressure wheels. For movement on loose snow, snow lugs are required, located along the entire circumference of the wheel (s).
If the design of the snowmobile has one rear wheel, follow the motorcycle model for the rear suspension. To do this, in addition to the frame, weld the rear swingarm and attach it to the frame through the hinge. Using motorcycle shock absorbers, make the swingarm suspension. Consider and install a chain drive from the engine to the rear wheel. After adjusting the drive, install the rear wheel.
If you wish to install two rear wheels, attach a short drive axle to the rear of the frame. For this purpose, find the rear axle from the cargo scooter "Ant" or shorten the axle yourself from the car. With soft low pressure wheels, the need for rear suspension is partly eliminated. The use of motorcycle shock absorbers makes the task technically very difficult. Automotive shock absorbers will not soften the suspension as they are designed to carry much more weight than a snowmobile.