Horex Regina
| Horex | |
|---|---|
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| Regina | |
| Manufacturer | Horex-Columbus-Werk KG |
| Production period | 1949 to 1956 |
| class | motorcycle |
| design type | Naked bike |
| Motor data | |
| 1-cylinder four-stroke, OHV | |
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| transmission | 4-speed |
| drive | Chain |
| Brakes | Full-hub simplex drum brakes |
| Wheelbase (mm) | 1390 |
| Seat height (cm) | 76 |
| Empty weight (kg) | about 150 |
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The Horex Regina was a motorcycle with a single cylinder engine, which the Horex Columbus factory in Bad Homburg vor der Höhe built from September 1949 to 1956. The designer Hermann Reeb, who worked at Horex as early as the 1930s, had developed the model from the SB 35.
engine and gears
General
The air-cooled single-cylinder block engine (crankshaft, clutch, gearbox, alternator and ignition system in a common housing) was a further development of the Columbus engine, which was also installed in the Victoria KR 35 in the late 1930s and early 1940s. The external design of this unit suggests an OHC valve control with a vertical shaft , but two push rods move in the protective tube on the right of the cylinder , which act on the rocker arms of the hanging valves. The camshaft of the first Regina engines was driven by a chain, which was replaced by spur gears after a short construction period. Rocker arms and tappets that moved the push rods lay over the cam . The primary drive from the crankshaft to the gearbox takes place via a 70-link duplex chain (3/8 × 3/16). The dry sump lubrication oil tank was located behind the engine .
Construction stages
At first the Regina was only built with the 342 cm³ engine, bore 69 mm, stroke 91.5 mm. The maximum output was specified as 18 hp (13.2 kW) at 5000 rpm. To start with the kick starter (on the left side of the engine) that was common at the time, the ignition had to be set to “late” with a finger lever on the handlebar and the air regulation to “closed”. Immediately before stepping on the kickstarter, the exhaust valve was opened by means of the decompression lever (valve lifter) in order to reduce the resistance, but closed again immediately when the piston went up. Later models had automatic ignition timing with a governor.
The improved version with, among other things, improved brakes or brake pads widened from 35 mm to 40 mm and a so-called "buffalo tank" with a capacity of 18 liters instead of the flat 12-liter tank ran under the name Regina 1.
In 1952, the Regina "Sport" appeared with an aluminum cylinder head instead of the previous gray cast iron cylinder head and only one exhaust port on the right-hand side (so-called single port system) in contrast to the standard version with two exhaust pipes and two silencers. With the same displacement, this engine developed 20 hp (14.7 kW) at 6000 rpm; the compression ratio was increased to 7: 1, the valve springs were reinforced and the tubular steel bumpers were replaced by an aluminum version, the carburetor was an Amal 27 C 1 BP with an acceleration pump.
Also in 1952 there was a 250 Regina, which was initially only intended for export, but was also available in Germany as the Regina 2 from 1953, alongside the Regina 3 with the 350 cc engine. The power was 17 hp. This model was externally recognizable by the single port exhaust on the left.
The most powerful model in the Regina series was the 400 from 1953. The engine with a displacement of 399 cm³ (bore 74.5 mm, stroke 91.5 mm) developed 22 hp (16 kW) at 5750 rpm. With this performance, the motorcycle reached a top speed of 130 km / h in solo mode and 95 km / h with a sidecar. The Regina 4 was built until the end of 1956.
From 1953 all Regina models had the light metal cylinder head.
transmission
The Regina had a multi-plate clutch in an oil bath and a four-speed gearbox; the power was transmitted to the rear wheel by an encapsulated chain. It was switched on the right with a rocker switch. Such rocker switches for operation with toes and heels or heels were unusual or only used in racing.
Framework and structure
The Horex Regina had a tubular frame, open at the bottom and made of seamlessly drawn tubular steel, suitable for sidecar operation , a hydraulically damped telescopic fork and straight-travel rear wheel suspension, front and rear wheel with quick-release axles, light metal full-hub brakes at the front and rear. Swing saddles or double bench seats were optionally available.
In 1954, Horex presented a Regina with a rear swing arm designed by Harald Oelerich for sports drivers; However, there was no longer any series production.
Technical specifications
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| Horex Regina (1956) | 250 | 350 | 400 |
|---|---|---|---|
| engine | 1-cylinder four-stroke | ||
| Displacement | 248 cc | 342 cc | 399 cc |
| Bore × stroke | 65 × 75 mm | 69 × 91.5 mm | 74.5 x 91.5 mm |
| Power at 1 / min | 17 hp (12.5 kW) for the 6640 | 19.4 hp (14.3 kW) for the 6250 | 22 hp (16.2 kW) at 5750 |
| Valve control | Underneath camshaft, rocker arms, bumpers, rocker arms, overhead valves | ||
| compression | 7: 1 | 6.8: 1 | |
| Carburetor passage | 26 mm | 26 mm | 27.5 mm |
| cooling | Air cooling | ||
| transmission | 4-speed gearbox with rocker switch | ||
| frame | Tube frame open at the bottom | ||
| Front suspension | Hydraulically damped telescopic fork | ||
| Rear suspension | Telescopic straight path suspension | ||
| wheelbase | 1390 mm | ||
| overall length | 2120 mm | ||
| Saddle height | 760 mm | ||
| Front / rear tires | 3.25-19 | 3.50-19 | |
| Brakes | Light alloy full hub simplex | ||
| Empty weight | 155 kg | 160 kg | 165 kg |
| Tank capacity | 18 l | ||
| Standard consumption | 3.4 l / 100 km | 3.7 l / 100 km | 3.7 l / 100 km |
| Top speed | 120 km / h | 126 km / h | 130 km / h |
| price | 2220.00 DM (1954) | 2190.00 DM (1952) | 2585.00 DM (1954/55) |
* Consumption at a constant three-quarters of the maximum speed, on a flat stretch with no wind + 10%.
Horex Regina for racing
Harald Oelerich , test engineer at Horex, and Friedel Schön - both private racing drivers - developed with factory support from 1950 onwards from parts of the Regina and the pre-war model S 35, a 350 series racing machine with a single-cylinder OHV engine that operated with alcohol 32 HP (23.5 kW) at 7500 rpm. As in the production model, the cylinder was made of gray cast iron, while the cylinder head was made of bronze. The crankcase from the S 35 and the foot-shifted four-speed gearbox were arranged separately.
The machine had a closed mono-tube frame with stiffeners. Telescopic fork, rear suspension and brake drums corresponded to the series, although the latter received ventilation. In addition to the standard version, the racing model had a tachometer that was connected to the camshaft. Other special features were a light metal tank, light metal rims, a continuous bench and tires measuring 3.00 × 21 ″ at the front and 3.25. × 20 ″ rear. The racing model weighed 115 kg and reached a top speed of 175 km / h.
literature
- Ernst Leverkus: The great motorcycles of the 50s. 8th edition. Motorbuch Verlag, Stuttgart 1993, ISBN 3-87943-849-8 .
References and comments
- ↑ a b c Ernst Leverkus: The glorious four. . In: Klassik Motorrad 1993. Mo-Verlag, Stuttgart 1992, p. 26.
- ↑ Richard Küchen was also involved in the construction of the SB-35 engine .
- ↑ Ernst Leverkus: The great motorcycles of the 50s. 8th edition. Motorbuch Verlag, Stuttgart 1993, ISBN 3-87943-849-8 , drawing by Siegfried Werner, p. 58.
- ↑ a b Jürgen Nöll: The great Horex book . Motorbuch Verlag, Stuttgart 2008, ISBN 978-3-613-02959-0 , pp. 97-116.
- ↑ Pictures on the website "horexhome", accessed on May 10, 2011 ( Memento from August 3, 2012 in the web archive archive.today )
- ↑ Ernst Leverkus: The great motorcycles of the 50s. 8th edition. Motorbuch Verlag, Stuttgart 1993, ISBN 3-87943-849-8 , p. 58.
- ↑ a b motorcycle brands accessed on May 10, 2011.
- ↑ Helmut Hütten: Fast engines - dissected and coiffed. 5th edition. Richard Carl Schmidt Verlag, Braunschweig / Berlin 1966, p. 376.
- ↑ 100 motorcycles in words and pictures. . 2nd Edition. Verlag für Handel und Wirtschaft, Munich 1952, p. 98.
- ↑ Ernst Leverkus: The great motorcycles of the 50s. 8th edition. Motorbuch Verlag, Stuttgart 1993, ISBN 3-87943-849-8 , p. 19.
- ^ Karl-Heinz Edler, Wolfgang Roediger: The German racing vehicles . Reprint of the 1st edition from 1956, Fachbuchverlag, Leipzig 1990, ISBN 3-343-00435-9 , p. 235 and 236.