The journal “modelist-Konstruktor” already published materials created by skilled craftsmen in Altai region opposed two-cylinder engines with integrated gearboxes (No. 3, 1987, and No. 8 for the year 1989). Now — the story of the machine for which they are intended, as well as an improved engine, M-40, assembled from parts motorcycle motors IZH-P-4 and Il-W-5 and tractor “poscache” PD-10.

The villagers steppe of the Altai, as the inhabitants of the far North in the winter just need a reliable and fast vehicle. Especially it need Rangers, hunters, and pastoralists. The only relatively affordable transport — a snowmobile “Buran”, but compared to our larger “Space” he was clearly losing.
“Space” surpasses it in speed, efficiency — and this is when the motors are almost equal capacity, and comfort and smoothness. Owners of “storms” often becomes burnouts pistons, breaks the belt variator bounce tracks. Released details scarce as to make them difficult. Snowmobile in case of breakdowns can be fixed yourself, even rotor installation — after items for the PD-10 and “IAM” available for sale. Years of operation showed that samodelnye, oddly enough, safer serial snowmobile.
On the underframe at the rear of the snowmobile is the engine with pusher propeller. Frame, welded from steel tubes of rectangular cross section and area, rests on the transverse beam and is additionally attached to the chassis sled struts. The case is made for “aviation” technology: power frame consists of frames and stringers, which are riveted cladding of duralumin sheets. The light single cab door will retract. “Plenty” carries two people with gear. The passenger is placed behind the cabin. This removed the fairing that covers the space between it and the engine.
Chassis snowmobiles — tricycle with front swivel bar. It is connected with the steering mechanism of the car “Moskvich-412”. Such a device is compact, light weight and free running.
General view of the snowmobile (in a side view, Fig.21 not shown)
General view of the snowmobile (in a side view, Fig.21 not shown):
1 — nose fairing, 2 — steering mechanism, 3 — body, 4 — cockpit, 5 — canister replacement, 6 — fairing detachable, 7 — screw air. 8 — frame under engine, 9 — passenger seat, 10 — seat for nyota, 11 — brace back support, 12 — fencing of the propeller of the lower, 13 — spring, 14 — tank 15 — throttle, 16 — hinge propeller, 17 — spring front support 18 — skis, 19 — undercut skiing, the 20 — shock 21 — fencing of the propeller 22 engine, 23 — lamp, 24 — step, 25 — rear coil. 26 — spring rear supports, a 27 — front bearing 28, if the beam transverse (D16T, pipe 1З0х 130×3).
Support front (front view, the nose cone is removed)
Front support (front view, the nose cone is removed):
1 —beam welded removable transverse (Vs, s1,5), 2— the hull plating (D16T, sheet s2), a 3 — frame (STZ, sheet s1,5), 4 — steering gear housing, 5 — stand (steel 45, steel 27×4,5), 6 — brace (STZ, the sheet s 1,5), 7 — bracket (STZ, sheet s3), 8 — podreczniki, 9 — spring, 10 — a shaft of the steering gear 11 is splined bushing (crown steering Pitman arm), 12 — flange bottom (STZ), 13 — the stopper (bolt M6), 14 — cushion (rubber), 15 — flange top (STZ), 16 — bolt M8 (4 PCs), 17 — rivet (D18, 05, 16pcs.), 18 — flange bearing housing (STZ, sheet s3), 19 — bearing support (STZ), 20 — 46206,21 bearing — bearing housing (STZ), 22 — axis (ordinate measuring tube 30×2,5), 23 — the joint housing (STZ, tube 36×3), 24 specalty mounting springs (M8), 25 — oiler.
Bow-Cust snowmobiles without fairing

Bow cvst snowmobiles without the fairing:
1 — the steering mechanism, 2 — bracket nose cone, 3 — elastic coupling. 4 — the bearing housing 46206, 5 — beam cross.
Attachment of springs to the front of the ski

Attachment of springs to the front of the ski:
1 —hour, 2 — spring, 3—ski. 4 — bracket, front (STZ, sheet s2) 5 — shelf (STZ, sheet s2), 6 — airbag (rubber), 7 — fingers (M10), spacer (STZ, pipe 14×1,5), 9 — washer (STZ, sheet s2), 10 — bushing, rubber 11 bracket rear (STZ, sheet s2).
Back support (left)

Back support (left):
1 – the bumper support (STZ, sheet s3), 2 — bushings are rubber (from the “Mos-cwna-412”), 3 — spring, 4 — finger lower springs (steel 45, starbolt M16), 5 — cheek (STZ, sheet s2), 6 trim (STZ, sheet s3), 7 — bracket (STZ, sheet s3), 8 — a covering skiing, 9 front (STZ, pipe 40x25x2.5), 10 — bracket upper leaf springs (STZ, sheet s3) 11 — finger upper spring (bolt M16). 12 -shock absorber 13, the strut (S, TK, sheet s1,5). 14— the joint housing (STZ, rough 30×3). 15 tube (rubber). 16 is undercut. 17-amplifier. 18 — sole. 19 — the axis of the hinge (STD. rough 24×2.5).
Main parts and components engine

The main component parts of the engine:
1 — gear cover, 2,1 — Plast ins back and front (STZ, sheet z,5), 3 — pads with additional mounting brackets back plate (STZ, sheet s6), 4 — pinion (z=20, 2 pieces), 5 — career, 6 — cylinder body, 8 — mounting bracket magneto 9 — the shaft of the propeller 10 is driven by the gear (z=53), 11 —filler cap, 12 — case cuff, 13 — tube drain, 14 — hole plug oil level monitor.
The view of the front of the engine

View of the front of the engine:
1 — magneto, 2 — tank launcher, 3 to the control mechanism carburetors, 4 — muffler 5 — exhaust pipe, 6 — passenger seat backrest folding.
The view of the rear of the engine

View of the rear of the engine:
1—drain plug 2 filler neck, 3 — gear cover, 4 — air intake of the carburetor, 5 — muffler.
Rear support

Rear suspension mount:
1 — hour, 2 — spring, 3 — spring, 4 — podreczniki.
Mounts for the rear springs
Mount rear springs:
1 —elements of the under-engine frame, 2 —bracket (STZ, sheet s2), a 3 — element fence propeller, 4—podreczniki, 5 — springs, 6 — longitudinal beam (D16T, area 30×30), 7 — stirrups (45 steel, rod Ø6), 8 — beam cross-section, 9 — plate gain (D16T, sheet s5), 10 — shelf (D16T, area 30×30).

The main parts of the design of skis.

The basic design details of the ski:
1 —amplifier, 2 — sole (D16T sheet s2,5), 3 socks (D16T sheet s2,5), 4. 7 —bumpers (D16T sheet s2,5), 5 — undercut (STZ, pipe 15×2), 6 — stud M6, 8 — heel (D16T sheet s2,5).

Ski suspension — independent. Front mounted on longitudinal leaf springs, and rear — transverse, partially performs the role of torsion bars operating on the torsion in a frontal impact. In addition, a rear suspension provided with hydraulic shock absorbers. All skis are connected to the uprights by hinges in the form of two pipes of different diameters, inserted into one another. In the gap between them using a grease gun grease stuffed.
Articulation the front of the ski with a spring made for car type: rear end fixed, and the front resting on the rubber pillow has one degree of freedom. Themselves skis are composed of several major dural parts: the average part of a sole; an amplifier made from pipe sprinkler installations; welded toe and heel. The latter is connected with the middle portion of the studs and bolts. For the best sliding sole of the ski is covered with sheet material with a low coefficient of friction (brass, stainless steel or sheet iron of a thickness of 0.8—1 mm). “Padding” is easily changed — just canoodling on the sole, and the edges bent over the boards.
Technical characteristics of the snowmobile “Play” with the engine M-40
Weight, kg:
maximum……. 370-400
Number of seats…………. 2
Ground clearance, mm…………….300
Base, mm………………2200
Track, mm……………..1600
power, HP…………. 40
the mass of the rotor, kg……… 70
the number of cylinders…..2
the number of reducer………..2,65
Diameter/screw, m……….1,75
The frequency of rotation
in/screw rpm…………1900
Pull/screw, kgf……..130-140
Fuel consumption per 100 km, l……………. 25

Engine M-40 — one of the options already familiar to the reader of the modular (a module is a cylinder and the crankcase with the crankshaft) design from ready-made components and parts, but easier to manufacture the oppozit with integrated gear. He, like previous models, the cylinders, heads and carbs taken from the “IZH-the Planet”, crankcases, crankshafts and pistons Assembly from the PD-10 and the reducer gear (z=20 and z=53) is from the engine D-240 MTZ-80.
The gear case is missing, and the housings are connected to each other through pads with additional mounting brackets reducer cap. With two sides closed by plates mounted in their bearing housings. In the upper bearings of the rotating shaft propeller-driven gear which is pressed on the shaft with an interference fit of 0.05—0.07 mm (after preheating). And to completely eliminate the mutual rotation of shaft and gear are welded circumferentially discontinuous seam 5-10 mm. In the construction of the “Space” of the axial thrust force of the propeller is perceived angular contact bearing 46208. He and crankshaft bearings are lubricated with oil poured into the crankcase through the pipe to the gear cover. The cover also has openings to control the level of oil and its discharge.
Changed and drive with a standard magneto (M-124Б1). Removed d-pad and modified the shank of the crankshaft. Now the magneto rotor with the crankshaft are connected by a rubber hose with clamps.
Engine and gearbox
The engine and gearbox (rotor conventionally not shown POS.8 cut-In):
1 – gear drive, 2 — Carter, 3 – body cylinders 4 — bushing of the propeller, 5 — gear driven, 6 — rear plate, 7, 11 — additional mounting brackets back plate, 8 — gear cover, 9 — bearing housing (AL 5), 10 — a flange of fastening of the engine to the underframe, 12 — seal, 13—coupling coupling, 14 — nozzle drive shaft magneto (steel 45), 15 the clamp (2 PCs.), 16 — magneto 17 mounting bracket magneto (STZ). 18 — plate front, 19— the pulley of the generator, 20, 24— bearing (STZ), 21 — bearing 180206, 22 — crankshaft, 23. 29-cuff, 25 — bearing 46208, 26 — propeller shaft (40ХГСА), 27 – key 28 — nut M22, 30 corps cuffs (STZ), 31 — propeller, 32 — adapter (steel 45), 33 a bearing 305.
The scheme revision of the inlet ports

Schema refinement of the inlet ports.
Scheme of revision of Carter from the PD-10
Schema refinement of the crankcase from the PD-10.
Rear view on the skin mountain the frame and engine
Rear view on the skin mountain frame and engine:
1 — pump, 2 — one of the points of fastening of the engine to the underframe, 3 — drain plug, 4 — betfilter.

The engine can be equipped with a battery ignition system. This requires a battery and a generator, such as G-250, belt driven from a pulley on the shaft of the propeller. And as the breaker — contacts magneto.
The power of such opposed take without forcing about 35-40 HP, and it effectively implements a propeller. The propeller thrust reaches 130-140 kgs. In addition, the two-stroke engine is the clear potential for speeding — if you want the power of the M-40 might bring to 50 HP
The motor is well balanced and with ambulancewoman screw is not experiencing any vibrations. Therefore, the sub frame is made easier and more convenient for inspection and maintenance of the power plant. The mass of the engine with the screw reaches 68-70 kg for snowmobiles is acceptable. However, if body parts are made of aluminum alloy, the engine will be easier still pounds ten.
The larger “Space” in our region popular. But we still continue to improve them. “Space” is still in the way.
the village of Blagoveschenka,
Altai Krai

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