WITH THE “BLIZZARD” ON THE VIRGIN SNOW

In a snowmobile “Blizzard”, which I constructed based on many developments, published in “M-K”, merged circuit elements of classic motoart, “amfitriti”, the snow. pneumona and aerolis, that is, almost all the famous trails of mechanisms. However, my vehicle can not be assigned to any of these groups — it’s the combination motorolaring propeller and skis, which is the driver. So I called my snowmobile motoliam. The ka drive them really very similar to the usual walk on the wads, because the driver drives a snowmobile standing up. Experience of its operation showed that the scheme has a number of advantages: high flexibility and good permeability at quite a satisfactory speed — up to 15-25 km h
Motolite consist of two main elements: walking tractor with a crawler gear and ski directly connected to the motor-block universal joint. Control of the mover is performed using made the helm and arms of gas, clutch and control of a CVT. To the runners better track surface when driving on a slope, the skis are connected by a parallelogram. This scheme in combination with a universal joint suspension provides greater flexibility, which is especially important when driving on uneven coating.
 
R and S. 1. Motoliga
R and S. 1. Motoliga “The Snowstorm”:
1, the starter motor pulley,2 — sprocket Z = 15, a 3 — sprocket Z = 30, 4 — pulley variator d 180 mm, 5 — pulley variator d 100 mm, 6 — pulley variator d 230 mm, 7 — dvuhromovo dry clutch, 8 — sprocket Z= 15, 9 — chain drive, 10 — side sprocket Z = 45, 11 — tractor yoke, 12–coupling hinge of fastening of skis, a 13 — track sprocket Z =12, 14 transverse spars, 15 — sub spar, 16 — ski, 17 parallelogram 18 — handle throttle control, 19 — control knob variable-speed drive, 20 — handle bar grip, 21 — reverse mechanism, 22 a clutch lever.
 

The frame of the cultivator — four load-bearing spar, four welded to the cross member and two longitudinal members, employees, sub frame. To the last front at an angle of 35° the buffer is attached to the visor, and the back — loop for the suspension of the towing arm. All spars are from two-millimeter steel channel section with a size of 45X30 mm. Possible to use thin-walled pipes ø 35-40 mm. the Ends of the supporting spars are equipped with glasses-tips for track tensioning. In welded to the walls of the shanks are done the adjustment holes (in the front — three rear — two). The glasses are assembled with bearings No. 203, closed nuts.
 
Fig. 2. Frame chassis with elements of propulsion
Fig. 2. Frame chassis with elements of propulsion (the lining rollers in a side view is not shown):
1 — carrying the spar 2 and the glass-tip, 3 — supporting roller, 4 — track roller, 5 — sprocket drive track, 6 — a cross-spar, 7 — guiding star 8 — axis rollers, 9 — panel, 10 — coupler 11 — washer (welded to the plate 9), 12 nut M8 13 — spacer roller, 14 — pinch bolt М8Х60, 15 — bearing No. 29, 16 — the rubber rim of the rink, 17 — hole for the pinch bolt М6Х40. On the section AA cross rails conventionally not shown.
 

Each bearing longitudinal bolts are mounted three support legs, which are mounted on one rink. To reduce the weight of the rack is facilitated by drilling. Hub rollers consist of two halves machined from alloy AL-2, and fasten the pinch bolts. Rollers have a rubber rim and connected in pairs by axles. On the last put on the longitudinal plates, connecting the three pairs of rollers and gives the necessary rigidity of the whole structure of the propeller.
 
Caterpillar is the conveyer belt with a thickness of 7 mm, a width of 300 and a deployed length of 2900 mm. To her in increments of 50 mm riveted rails 58.
 
The drive of the tracks is made using two pairs of rear sprockets connected by promezhutochnykh. Drive and idler sprockets are identical and are made of the PCB 18 mm thick (Z = 12). The intermediate shaft has side sprocket (Z = 45), which is transmitted torque from the engine through chain transmission. Both propeller rotate synchronously; turn motobug is carried out by changing the direction of the entire mototada.
 
Fig. 3. A glass-tipped
Fig. 3. A glass-tip:
1 — carrying spar (channel 45×30), 2 — the shank of the Cup (the channel 41X25), 3 — the case of the glass, 4 — shaft sprocket, 5 — pressure washer (nut M42), 6 — Ganka М16ХІ.5, 7 — bolt shank М8Х20, 8, 9,11 — spacers, 10 — bearing No. 203.

 
Now about the power plant. Many fans use of puskach PD-10 with the Izhevsk cylinder. Such combination only with the engine PD-8 and the cylinder from the Tula scooters, failed me. The fact that the PD-8 inlet ports of small cross section, so thanks to the replacement of cylinder on cylinder scooter T-200 or Tulitsa engine power increases from 8 to 10-12 HP As the cylinder head for the PD-8 is designed for large volume of the combustion chamber, so as to keep the same compression ratio as on the T-200, had to use motorolleri head. In addition, Carter’s PD-8 was undercut ledges of the former reducer. The result is a simple and reasonably reliable engine. Starts the motor by means of a cord, which on the left the axle of the crankshaft pulley installed.
 
Fig. 4. Track
Fig. 4. Track:
1 — rail Assembly, 2 — clip, 3 rubber bands, 4 — rivet.

 
A key element of motorig transmission — CVT, combined with a dry double disc clutch, made my own calculations, but I can’t recommend to repeat it to others in the same execution. The fact that the variable I was hoping for a specific strap that’s available. I think his design and some parameters (in particular, the control range) can be improved. The only thing I can recommend to fans: if the belt is relatively narrow, to increase the regulation range of the drives of the pulleys, it is useful to be milled, that will allow the pulley halves to enter into each other (matolyak is a mutual occurrence is 10-15 mm). In a similar way used the enthusiasts of technical creativity from Khanty-Mansiysk V. Me-ledin, A. Abdurashitov and V. Kurzenko . Also, I will not lead and drawings of mechanism of reverse of motorig, as all five of his gear is homemade and it hardly makes sense to repeat them one by one.
 
During the operation it was found that a significant portion of power consumed for rotation of the propeller. It is advisable therefore, to reduce the thickness of the track up to 4-5 mm to give it more elasticity. There are reserves and in facilitating the design: many of its power elements can be made from lighter materials. To decrease the specific load on the ground is useful to increase the width of the tracks. So I have plans in the future to significantly improve their “Blizzard”.
 
N. SKREBNEV, G. K a R p I n s K, Sverdlovskaya.

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