The NW type S is a series of large automobiles manufactured by Nesselsdorfer Wagenbau-Fabriks-Gesellschaft A.G. (NW, now known as Tatra), in

Moravia Moravia ( , also , ; cs, Morava ; german: link=yes, Mähren ; pl, Morawy ; szl, Morawa; la, Moravia) is a historical region in the east of the Czech Republic and one of three historical Czech lands, with Bohemia and Czech Silesia. The m ...

, in what was then

Austria-Hungary Austria-Hungary, often referred to as the Austro-Hungarian Empire,, the Dual Monarchy, or Austria, was a constitutional monarchy and great power in Central Europe between 1867 and 1918. It was formed with the Austro-Hungarian Compromise of ...

Hans Ledwinka Hans Ledwinka (14 February 1878 – 2 March 1967) was an Austrian automobile designer. Youth Ledwinka was born in Klosterneuburg (Lower Austria), near Vienna, then part of the Austro-Hungarian Empire. He started his career as a mechanic, a ...

, who left the company in 1902, was hired back in 1905 (meanwhile he worked for company of Alexander Friedman in Vienna). Immediately he started working on a new car with modern and progressive design. Some of the new features included

overhead valve An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located b ...

s, actuated by

overhead camshaft An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

(OHC), and

hemispherical combustion chamber A hemispherical combustion chamber is a type of combustion chamber in a reciprocating internal combustion engine with a domed cylinder head notionally in the approximate shape of a hemisphere (in reality usually a spheric section thereof). An en ...

. The water-cooled engine was mounted at three points and the engine block had large service access doors. The engine with the gearbox formed one massive unit, so-called monoblock. The gearbox itself was of a bell shape with only five gears. Two gears were ring type with teeth on the inside surface. Individual speeds were engaged by moving the gears radially. The rear axle was driven by a drive shaft in lieu of chains. The S 4 and S 6 with four-cylinder or six-cylinder engines were able to reach maximum speeds of 80 km/h and 100 km/h (50/62 mph). The S 18/24 and 16/20 models developed , while the S4 20/30 offered . The later, six-cylinder S 6 40/50 version was an S4 with two cylinders added; it produced and was introduced in 1910. The total production of both models was 74 units.

References

Cars of the Czech Republic Tatra vehicles Rear-wheel-drive vehicles 1910s cars Vehicles introduced in 1906 {{Brass-auto-stub