Primarily the frame, the cornerstone of the design of any machine, if their body is not carrying. Because the snowmobile was conceived still as a test for the motor, the circuit had to be as simple as possible. Here trehlistnyj option, no body — only a small front-fairing is made of plywood and the windshield above it. This ease and openness of the whole structure, the author and called her aeronorte.
But no body should be the frame. Usually in these cases of metal profiles, pipes or wooden bars mounted rectangular or triangular base, on which everything else is attached.
M. I. Pisarev — perhaps for the first time to snowmobile, have used a backbone frame. Used duralumin pipe of large diameter — 125X2. 5 mm, which gave both a gain in weight, and necessary rigidity and strength to the whole structure. Mounting of parts and assemblies on the kind of frame used is extremely simple, but also reliable with clamps from wide stripes to which, if necessary, welded support elements mounting: bushing, crossmember, lugs under screw connections. Interestingly, when all other winnings frame tube has one additional functional advantage that is not implemented by the author of the design, but incorporated in the scheme: being sealed at the ends, the eye can serve as vmestitelnuyu the tank in case of long journeys. For this front, through the shield and the fairing is integrated filler neck, and behind the fuel line to the motor.
1 — steering ski, 2 — plug, 3 — dome lights, 4 — front clamp, 5 — fairing, 6 — a motorcycle wheel, 7 — seat-trunk, 8 — polnogo, 9 — rubber buffers, 10 — magneto 11 — fencing screw, 12 — pulley for starting the engine — muffler (side view not shown).
Dotted line shows position: front — fuel filler neck for the option of “pipe — tank”; rear — gas lines.
All three skis have shock absorption from the two-way springs. Long-term practice has shown that it is suitable material for ski is birch Board thickness 20-25 mm; to improve the slip sole is glued with polyethylene and to improve the controllability of each ski bottom is installed, the undercuts of the area. Front ski swivel; mounted on the fork from the front wheel of the bike, taken together with the steering bushing, welded to the end cap front clamp. Cross beam of a steel tube to which are attached the back of the ski, at the same time is the backbone of the sub-frame. On the latter, in turn, is attached to the bracket of the fence screw. This whole site with the help of two clamps connected with the spinal frame.
Engine 25 HP — own design, made from parts and components of motorcycle engines “Jupiter 4” and boat — “Hello”, with carb-TO-36Ж and doohickery magneto KATEK M135. On the motor shaft mounted pulley to run and screw Ø 1060 mm by 540 mm.
Nose cone from sheet material on angle frame with reinforcing gussets at the corners mounted on the front and the first middle clamps. Below goes the steering column is connected by a rod with swivel lever fork. Top installed on the studs windproof canopy with glass on the rubber seals.
The driver’s seat — box type made of plywood 6 mm thick, bonded dural angles; top — soft pillow. The bottom of the box are fastened two wooden pegs from the Board thickness of 20 mm. In front and rear walls of the box has a hole Ø 125 mm, due to which it is put on a pipe-frame and foot pegs attached to the cross members, welded to the middle clamps. The top cover seat with cushion flips up and the drawer can simultaneously serve as a small trunk.
Due to the mutual capacity and ease of mounting sites also received a gain in weight. Aeronorte turned out aesthetically pleasing in appearance, practical, easy — 75 lbs. At the competition they have developed a speed of 70 km/h, losing only to snowmobiles with engines from “Volga” and motorcycle “Ural”.