Motorworld’s paper № 11
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In 1927 there was a great sensation when a motorcycle was presented that made the Windhoff company famous and secured it a rightful place in the global motorcycle history. Hans Windhoff and Josef Dauben created a design at the time that still looks modern today. It was a motorcycle with an inline 4-cylinder OHC engine with 748-cc capacity and 22 h.p. rating.

Windhoff 750

The aluminum unit housed the three-bearing crankshaft and cylinder liners. The aluminum unit head contained eight vertically-arranged valves that were directly activated by the camshaft arranged above them. The original option was to use short crossbeams, but this idea was later abandoned. Both the camshaft and the oil pump located in the engine sump were driven by the cog wheels from the crankshaft.

Windhoff 750

The oil pump played a leading role in the total design since the Windhoff motorcycle engine was cooled with oil. Circulating under pressure between all stressed parts of the engine the 6.5 liters of oil set onto the walls that were heavily ribbed on the outside, and then it cooled off while flowing down into the sump—thus no oil cooler was needed.

Windhoff 750

A 3-speed manually-switched gear box with the multiple-disc clutch, the kick starter and the transmission brake controlled by a foot pedal were directly affixed to the engine. The whole power assembly was the base of the suspension system: a forged frame with the steering column was “put onto” the cylinder head, from the top, while at the back horizontal tubes extended from the gear-box casing and between these tubes the sump of the cardan main gear was secured (well, it was actually torsional for the rear suspension was rigid and universal joints were not used).

Windhoff 750

The front fork of the Windhoff motorcycle was a leading link fork, rather complex in its design, and two short quarter-elliptic springs were used as elastic elements. The manual drum-type brake was installed in the front wheel flange. The speedometer was arranged on the fuel tank that had capacity of 14 liters. The 4-cylinder Windhoff had a mass of 185 kg and it could achieve a maximum speed of 120 km/h. These motorcycles did not enjoy a great commercial success, but there was a stable demand for them coming from the connoisseurs of technology.

Compiled using materials from the Motorcycle Encyclopedia of the Za Rulyom magazine.

Manufacturer Windhoff Motorenbau GmbH, Berlin (Germany)
Years of manufacture 1927 – 1931
Quantity produced, units 1 450
Price 1 750 RМ
Today’s value 5083,34 $
ENGINE AND TRANSMISSION
Type 4-cylinder, OHC
Engine capacity, cc 748
Bore and stroke, mm 63 х 60
Engine rating 22 h.p. at 4000 rpm
Sparking magneto
Carburetor Zenith 22K4
Battery 6 V
Clutch
Transmission 3-speed
FRAME AND WHEELBASE
Frame type Engine makes up the frame
Front suspension Quarter-elliptic spring
Rear suspension Rigid
Brakes Manual, drum-type, at the front wheel
Wheel size 3,85 х 20
DIMENSIONS
Length, mm
2 200*
Width, mm
800*
Height, mm
1 070*
Wheelbase, mm
1 450*
Ground clearance, mm
140*
Seat height, mm
780*
Mass, kg
   185
Gas tank size, l
     14
Maximum speed, km/h
    120
Range, km
   

* – Data from the results of the measurement of the “Motorworld by V.Sheyanov” exhibit.