SANI — FORWARD!

It’s been 8 years since then, as the article about my snowmobile “Space” was printed in the pages of “Modeller-designer” (#1, 1998). Unfortunately, the number of published on the topic of materials over the years can be counted on the fingers, although I’m sure that the interest Aerotechnica constructors-homebrew is great, and not only among the inhabitants of Altai and the far North.

 

After the “Space” I got a new snowmobile (yet untitled, it will Mature later when it’s done cabin), this time single. And although they are built on the classical scheme trehmernoi, I hope that readers will be interested in new design solutions of the ski, suspension, steering, etc. But all this in the following materials, and this publication is dedicated to I have developed various variants of the power plant for aerotechnik.

 

Start with the engine, designated D-30 (photo 1). It is a 2-cylinder, on the basis of the details of the scooter Tulitsa and starting engine PD-8 has a capacity of 30 HP. Single carb-TO-62И two cylinder Gear reducer from the engine timing of tractor MTZ-80 (gear ratio I = 2,65).

 

 

Photo 1. Engine D-30

 

 

Photo 2. D-30 with electronic ignition system

 

 

Photo 3. D-15 (left — back, right — front view)

 

The unit presented in this picture, equipped with electric starter and battery type 6 ST-45. Generator G-424 from a motorcycle “Ural”. The ignition battery, ignition coil VAZ-2106 (2 PCs.), chopper from “Jupiter-5,” voltage regulator — 121.3702 M, tachometer from VAZ-2106. Provides a supply of heated air to the carb (exhaust pipe right at the cylinder stroke). The fuel tank capacity is 30 l the Flow of gasoline to the carburetor when the engine is running is a vacuum gas pump, before starting the pump from the VAZ-2106, which is included in the input trunk in series with the vacuum. The generator drive belt. The starter and battery 6ST-45 can be removed by replacing one battery 6МТС-9 is a lightweight option (when starting the engine for the screw).

 

Screw diameter — 1.6 m the Direction of rotation of the propeller — left.

 

D-30 was tested with other ignition systems (photo 2). On the left trunnion of the crankshaft mounted generator 43.3701; on the right axle — drive for dvuhkrugovogo magneto (pictured ignition electronic, with two sensors, two switches, CAT-1A and coils B-300B). In this embodiment, the magneto is a backup ignition. Reconfiguration on the above ignition system is not complicated and takes very little time.

 

The working cycle in the cylinders D-30 are offset by 180°, the engine is well balanced, almost no vibration. Engine weight is 40 kg.

 

When assembling the D-30 used items “Tulitsa” (no change): cylinders, heads, pistons with rings, carburetor (K-62И), sealed bearings, crankshafts (one axle was processed under the cone for generator 43.3701). As the crankcases crankshafts were used prepared from the starting engine PD-8 (tractor T-40) with slight modifications

 

On these sleds has been tested and other engines (single cylinder): D-15 (0,8 — 40); D-15ts (1,4 — 60); D-15z (1,45 — 65) — on the basis of “Tulitsa” and DD-8; D-22 on the basis of IZH-P-5 and PD-10.

 

D-15 (3) is essentially the base module for the D-30 and other possible engines (3 – and 4-cylinder). Engine weight 20 kg, power 15 HP, Gearbox for the propeller module is missing; the diameter of the used screw is 0.8 m pull — 40 kgs. Can be used on light planes and ultralight aircraft (gliders, hang-gliders, etc.), as well as on boats as an alternative hydrovent where he can’t work due to the winding of grass blades or damage by underwater obstructions: rocks, driftwood. And most importantly — with such Aeromotive plants boats can go in shallow water.

 

 

Photo 4. D-15ts (left – back, right – front view)

 

 

Photo 5. D-15z with integrated gear reducer (left — front view, right back view)

 

D-15ts (photo 4) is characterized by the presence of chain gear on the propeller of this engine transmission “Tulitsa” = 2,353). A motor with a screw with diameter of 1.4 m and weighs 25 kg and develops higher tractive effort up to 60 kgf, which extends the possibilities of its application.

 

D-15z (photo 5) has a built-in gear reducer (i = 2.5) of the.

 

The screw diameter is 1.45 m, the pull — 65 kg, weight 27 kg. is Recommended for use on light planes, paragliders, hang gliders, microplane. The gears in the gearbox from the engine timing “KAMAZ-740”.

 

All engines series D-15 have a power of 15 HP can be set-ignition: magnetos, electronic, Dina-starter

 

D-22 is a “half” engine M-40, described in the “Modeller-designer” (#1, 1998). He built from parts starting motor PD-10 (crankcase, crankshaft, piston rings) and IZH-P-5 (cylinder, head, carb). Power 20 — 22 HP Has a built-in gearbox (i = 2,65), screw diameter — 1.5 m, pull — 85 kgs, weight — 40 kg. it Should be noted drawback is the vibrations from the crank that can be removed by a special attachment to the frame of the snowmobile.

 

On the basis of the module of the D-15 I developed (in the drawings) 3 – and 4-cylinder engines. However, before the construction it did not come: I have a need for them yet.

 

V. ERMAKOV, p. Blagoveshchenka, Altai Krai