Aermacchi Bicilindrica
| Aermacchi | |
|---|---|
| Bicilindrica | |
| Manufacturer | Aeronautica Macchi |
| Sales description | Bicilindrica 250 |
| Production period | 1952 to 1954 |
| class | motorcycle |
| Motor data | |
| 2-cylinder 2-stroke | |
| Displacement (cm³) | 246 cc |
| Power (kW / PS ) | 7.4 kW |
| Top speed ( km / h) | 105 km / h |
| transmission | 4-speed |
| drive | Chain |
| Brakes | drums |
| Empty weight (kg) | 97 |
The Aermacchi Bicilindrica is a motorcycle manufactured by the Italian company Aeronautica Macchi from 1952 to 1954. "Bicilindrica" means "two-cylinder" in German.
history
The manufacturer's first motorcycle was the Cigno, presented in 1951 . For the Bicilindrica, which appeared a year later, two of the units were placed side by side, so that a two-cylinder in-line engine was created.
The market success of this machine was disappointing with only 150 copies built, so that production was discontinued in 1954 without a successor.
technology
Engine and drive
The Bicilindrica has an air-cooled two-cylinder two - stroke engine with almost horizontal cylinders. On the left stump of the double-bearing crankshaft there is a multi-plate oil bath clutch, via which the engine power is passed on to a straight-toothed four-speed gearbox. The transmission is connected to the rear wheel by a machine chain.
The petrol / oil mixture 1:17 is fed to the engine via a round slide carburetor with a 22 mm passage from the 16.5 liter tank. The ignition spark comes from an ignition light magnet .
Frame and chassis
The Bicilindrica has a tubular steel frame with lowered central tubes. Both wheels have sprung arms , with friction shock absorbers at the front. The frame, fenders and tank are painted in black or metallic blue.
Wheels and brakes
The 15 ″ wheels are wire-spoke wheels and have half-hub drum brakes . The rear brake is operated via a foot lever on the left side of the engine and a linkage, the front with a cable from the handlebars.
Technical specifications
| Type | Bicilindrica |
| Construction period | 1952-1954 |
| Displacement | 246.0 cc |
| Bore × stroke | 52 mm × 58 mm |
| compression | 6.8: 1 |
| power | 10.0 PS (7.4 kW) |
| at speed | 5000 rpm. |
| transmission | 4-speed |
| Brakes front / rear | Drum / drum |
| Front / rear tires | 3.50 ″ × 15 ″ / 3.50 ″ × 15 ″ |
| Empty weight | 97 kg |
| Top speed | 105 km / h |
Sources and individual references
- ↑ a b c d Mick Walker: Aermacchi . Transport Source Books, Olney & Ipswich 1995. ISBN 1-85847-501-5 (English)
- ↑ a b c d e f Aermacchi 250 Bicilindrica . Aermacchi Registro Storico Italiano. Retrieved February 25, 2014
