RACING CLASS 1.5 cm3Continuously growing speed racing car, top athletes, designers are finding new technical solutions that increase the speed of avtopoligon, new methods of forcing-engines, better ways of suspension. And as a natural result — new records. So, last year, the master of sports of the USSR, Leningrad A. Medvedev at the all-Union competition “Match the fittest” broke the record of the Soviet Union — his polutorametrovy was racing the distance at a speed of 223,880 km/h!


Of course, such speed on the shoulder only the most experienced automodellista. In the Junior competition models of the same class run at speeds halved, so the possibilities of improving apparatuses of the boys a lot. And one of the ways — following the reference samples of self-similar technique. One of such designs is a racing Hungarian athlete D. Gabor.
It can be recommended to athletes involved in automodelismo at least three or four years. The model is not too complex to manufacture, and construction sites are very technological.
Front suspension — longitudinal swinging arm with a rubber damping element that ensures excellent performance at virtually all speeds and all surfaces of self-similar kartodromo. The trailing arm is made of aluminum alloy D16T or AK4-1T.
Fig. 1 Design racing polutorachasovoj:
Fig. 1 Design racing polutorachasovoj:
1 — the screw of fastening of a cowl, 2 — elastic element of the front suspension, 3 — fairing (fiberglass), 4 rocking chair front suspension, 5 — front wheel 6 — guide rollers (Polyacetal), 7 — fuel tank. 8 — return spring lever, engine stop, 9 — lever engine stop. 10 — motor, 11 — resonance tube, 12 — mounting bracket resonance tube, 13 — a “crutch” 14 — cushioning element rear suspension (spring). 15 — rear wheel, 16 gear. 17 — coupling half-drive, 18 — choke, 19 — axle front suspension, 20 — the case of bus devices 21, the valve stopping device. The 22 cord strap. 23 — joint of the rear suspension. 24 — basis.
The front is pivotally attached to the base by means of a cylindrical dowel pin d 4 mm, the rear slides on a vertical guide, cut the NC PTFE, being a kind of bump limiting limit course the front of the bridge.
Drives front and rear wheels, collapsible, consisting of two palutikof, machined from aluminum alloy D16T or-95. The rubber is “baked” in dural form.
The rear wheel is also suspended on longitudinal rocking lever. The role of the latter, however, takes the body of the reducer, mounted on a hinge located exactly on the axis of the coupling. The elastic suspension member — coil spring. It is desirable to make some such dampers of varying stiffness — this will help you choose the best for this track.
The gear case: steel (45 steel, normalized), the input shaft, made of alloy 12ХНЗА (LDC = 55) planted in housing on two bearings 6×16 mm, on the same shaft is fixed and pinion, also of steel 12ХНЗА, NKS=60. From the same steel and the driven bevel gear.
Fig. 2. Bevel gearbox
Fig. 2. Bevel gear:
1 — insert-hinge, 2 — input shaft of the gearbox, 3 — gear case. 4 — bearing (5X16 mm). 5 — donecka gear. 6 — nut and washer, 7 — the rear axle 8 bearings (5X11 mm). 9 — spacer, 10 — washer, 11 — bevel gear, 12 — conical sleeve, 13 — spacer.

The base model is milled, material — D16T or AK4-1T. It is best to start when they made all the components and parts in the box, it will produce intermediate bulk design is to specify the location of the model elements.
Fairing laminated of fiberglass and epoxy on the wooden disk, the shell thickness is about 0.5 mm.
Of interest is the automatic stop of the engine. OI is based on the principle of overlapping of fuel and consists of a housing with soldered to it with two fittings and spring loaded valve, held by the lever.
Fuel tank — tin, solder, a volume of about 30 ml.

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