Valveless
Illustration — David Brown & Sons' (DBS) 1914 Valveless at Tolson Museum • Illustration — Engine of a "Valveless" car • Illustration — Patent Drawing by Ralph Lucas in US Patent US952706A The Valveless was an English automobile manufactured, after lengthy development, from 1908 until 1915 in Huddersfield, Yorkshire. The successor to the Ralph Lucas Valveless, the car marked the entry of the David Brown & Sons group into the manufacture of motors. Its engine was a 20 or 25 hp duplex two-stroke model which was advertised as having "only six working parts"; these included two pistons, two connecting rods, and two crankshafts, which were geared together and counter-rotated.
Valveless
Charlesdrakew · Public domain
- Founded
- 1908
- Activity
- automotive industry
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Illustration — David Brown & Sons' (DBS) 1914 Valveless at Tolson Museum • Illustration — Engine of a "Valveless" car • Illustration — Patent Drawing by Ralph Lucas in US Patent US952706A The Valveless was an English automobile manufactured, after lengthy development, from 1908 until 1915 in Huddersfield, Yorkshire. The successor to the Ralph Lucas Valveless, the car marked the entry of the David Brown & Sons group into the manufacture of motors. Its engine was a 20 or 25 hp duplex two-stroke model which was advertised as having "only six working parts"; these included two pistons, two connecting rods, and two crankshafts, which were geared together and counter-rotated.
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wikidata · Q2509636 · wikipedia · Valveless
In this article
Models
Models
This is a type of engine configuration known as a split single since it is effectively a single cylinder split into two.
• 1908 20 hp 2-cylinder 133 × 140 = 3.891 litres • 1909–1911 25 hp 2-cylinder 133 × 140 = 3.891 litres • 1911-1915 15 hp 2-cylinder 112 × 127 = 2.503 litres • 1913 15 hp 2-cylinder 118 × 127 = 2.503 litres • 1913–1914 19.9 hp 2-cylinder 127 × 127 = 3.217 litres • 1915 19.9 hp 2-cylinder 127 × 133 = 3.546 litres • The cars with smaller engines had slightly shorter wheelbases and so were lighter.
Institutional history
Dated record
Institutional history
The full dated record · 2 entries
1908
Valveless established.
1908
Valveless is recorded from 1908.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.The Autocar. Autocar Handbook. Iliffe & Sons. 46. c. 1919.
- 2.Culshaw. Complete Catalogue of British Cars. Macmillan. 1974. 0-333-16689-2.
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