FROM THE DRAWING BOARD - ON THE TRACKTo design and manufacture a racing car that would satisfy all the requirements of the sport today — Oh, how difficult! To do this, the athlete has to be both a competent designer, and technologist, and specialist in materials science, and machine operator-universal.
But, anyway, work on any new micromachines starts with a sheet of drawing paper. At this stage it is possible to carefully analyze the layout, to exclude or to neutralize disadvantages of the design.
To help the athletes in the most critical stage of design and designed this publication. Using drawings, you can build a modern cord class E2 or using these materials to try to create your own version.
The machine successfully passed sea trials. Front suspension and rear axle showed reliability in operation and a stopping device functioned flawlessly.
The model designed for serial domestic Microdrive CSTOM 2,5 CU-AC. However, the frame design allows to install other Soviet and foreign motors in this class. The frame is made of duralumin by milling according to the preliminary layout. On the frame with the help of crackers hung the rear axle housing, which is milled from a steel type 40CR. On the axes crackers are deep groove ball bearings 4X11.
Gear ratio 1:1,8125. Gear made integral with the shafts. Material — steel 12 HSA (carburizing and related heat treatment to the hardness after quenching in the range of HRC 60… 62). Gear shaft reducer is mounted on two ball bearings 6X19, and the shaft-gear rear axle — bearing 6X15.
The design of the rear and front shock absorbers similar to each other: the steel glass is the bronze piston and the spring, and to mitigate the recoil shock suspension at the bottom of the Cup padded soft rubber.
Control line racing car with an internal combustion engine working volume of 2.5 cm3.
Control line racing car with an internal combustion engine working volume of 2.5 cm3:
1 — the screw of fastening of a blister, 2 — blister, 3 — arm suspension front wheels, 4 — front wheel 5 — bearing, 6 — absorber of the suspension Assembly, 7 — fuel tank 8 — stopping fixture, 9 — antenna, 10 — Microdrive CSTOM 2,5 CU-al, 11 — flywheel, 12 — propulsion coupling, 13 — propeller shaft 14 — resonance exhaust pipe 15, and the rear axle housing, 16 — rear shock suspension assy, 17 — bracket exhaust pipe 18 — “the spur”, 19 — rear wheel, 20 — frame 21 — the axis of the swing arm, 22 — axle front wheel, 23 — feet tank, permitting adjustment of its position relative to the carburetor of the engine, 24 — detail cord strap, 25 — driveline coupling half, 26 — gear shaft of reducer, 27 — shaft-gear rear axle, 28 — remote sleeve, 29 — spacer sleeve, 30 — knot swing of the rear axle.
The rear axle housing.
The rear axle housing.
Shaft-gear reducer.
Gear shaft of reducer.
Gear shaft of the bridge.
Gear shaft bridge.
Rear wheels Ø 78 mm collapsible. Fixing them on the hubs — with split cones. In turn, the hubs are fixed with M6 nuts. On the threaded end of the pinion shaft of the gearbox is screwed a steel half-coupling with the groove under the pin of the propeller shaft. The distance between the axes of the pins is 20 mm, which is sufficient to compensate for the misalignment generated during operation of the cushioning of the suspension. In the bores of the coupling halves stacked pieces of foam.
A stopping device according to the scheme follows the development of N. Troneva given in the book Gusev and Osipova “Guide for avtomodelistov”. It is very reliable in operation, and was tested on several models — the number of denials was not. The fuel tank soldered tinplate. Has a fill tube with a threaded plug, the drain and supply tubing. On the frame the tank attaches with two screws M3.
And rear, front wheel collapsible design. Discs pressed in bronze bushings, which are fixed to the axle with a standard spring rings. The axis rotates in two ball bearings 5X13. Front control arm during the movement of the model oscillates, turning on a fixed axis in the frame Ø 4 mm. In arm, milled from D16T also pressed bronze bushing.
Fairing body wikiepedia on the disc of fiberglass epoxy resin ED-5. Mounting the fairing in the three points M3 screws. The engine is equipped with a homemade resonant exhaust pipe.
V. BYKOV, Khabarovsk

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