Matchless Silver Hawk is a
Bert Collier designed
motorcycle
A motorcycle (motorbike, bike; uni (if one-wheeled); trike (if three-wheeled); quad (if four-wheeled)) is a lightweight private 1-to-2 passenger personal motor vehicle Steering, steered by a Motorcycle handlebar, handlebar from a saddle-style ...
produced by
Matchless
Matchless is one of the oldest marques of British motorcycles, manufactured in Plumstead, London, between 1899 and 1966. A wide range of models were produced under the Matchless name, ranging from small two-strokes to 750 cc Four-stroke cy ...
for 1931 and introduced at the 1930 Motorcycle Show at
Olympia, London
Olympia Events, formerly known as Olympia London and sometimes referred to as the Olympia Exhibition Centre, is an exhibition centre, event space and conference centre in West Kensington, in the London Borough of Hammersmith and Fulham, L ...
as their range-leading luxury model. It was one of two up-market four-cylinder machines introduced during the 1930 Show season from two manufacturers; the Silver Hawk whose production would last less than four years and the
Ariel Square Four
The Square Four is a motorcycle produced by Ariel Motorcycles, Ariel between 1931 and 1959, designed by Edward Turner (motorcycle designer), Edward Turner, who devised the Square Four engine in 1928. At this time he was looking for work, showing ...
, whose production lasted until 1959. Other British manufacturers produced 4-cylinder machines in small quantities in the 1930s, including
Brough Superior
Brough Superior ( ) motorcycles, sidecars, and motor cars were made by George Brough in his Brough Superior works on Haydn Road in Nottingham, England, from 1919 to 1940. The motorcycles were dubbed the "Rolls-Royce of Motorcycles" by H. D. ...
's
Austin-engined BS4 (11 built 1932–34) and the prototype
Golden Dream (2 built in 1938).
Description

The Silver Hawk's 592 cc design was a development of the
Silver Arrow and shared a similar frame design and cycle parts, as well as the monoblock 26 degree V with a one-piece
OHC
An overhead camshaft (OHC) engine is a piston engine in which 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 combustio ...
head concept. The single bevel-gear overhead camshaft ran across the cylinder head and four bores with special air cooling housed two pairs of cylinders at 26 degrees to each other. A single carburettor fed all four induction valves through a cross shaped induction that produced an uneven feed. Lucas coil and dynamo ignition with distributor was driven by skew gearing from the camshaft-drive vertical shaft. A dry-sump oil system was supplied from a 6-pint steel tank at the base of the front-down tube, bolted to the engine's crankcase. The engine was flexible, however, and could be started by hand and run in top gear most of the time. This was an important factor for the hand-operated gear change.
In the sales literature Matchless described the Silver Hawk as ''unquestionably the most fascinating machine to ride that has ever been built. It combines the silence, smoothness and comfort of the most expensive motor car with a super-sports performance. On top gear alone the machine will run from as low as 6 miles per hour to over 80 miles per hour, while the acceleration given by the four-cylinder overhead camshaft engine in conjunction with the four-speed gearbox must be experienced to be believed.''
In a review of a Silver Hawk still in daily use in 1965 it says the bike was only in production for 3 years and was priced at £75.
[Mighty Matchless, Motorcycle Mechanics, June 1965, pp40-41"] Top speed was said to be over 85 mph, though the handling when the elderly machine was tested was described to be a "bit off, by present day standards". The engine was particularly long-stroke with a bore of 50.8mm and a stroke of 73.2mm. While the front forks were
girder
A girder () is a Beam (structure), beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing ''flanges'' separated by a sta ...
-type the rear suspension was triangular with damper and springs under the saddle "same set-up as
Vincents".
The main competition for the Matchless Silver Hawk in the top end 4-cylinder British luxury motorcycle market at the time was the
Ariel Square Four
The Square Four is a motorcycle produced by Ariel Motorcycles, Ariel between 1931 and 1959, designed by Edward Turner (motorcycle designer), Edward Turner, who devised the Square Four engine in 1928. At this time he was looking for work, showing ...
, which was £5 cheaper, but 100cc smaller (in 1931). Manufacture of the Silver Hawk was expensive and sales were slow - the Hawk was discontinued in 1935.
References
{{Reflist, 30em
Silver Hawk
''Silver Hawk'' () is a 2004 superhero film directed by Jingle Ma and starring Michelle Yeoh, Richie Jen, Luke Goss, Brandon Chang and Michael White. Yeoh plays the title character, a masked comic book style heroine who rides a motorcycle, s ...
Standard motorcycles
Motorcycles introduced in the 1930s