In 1919 the company was renamed as Sopwith Aviation & Engineering Company and the factory was re-organised to produce ABC motorcycles under licence; this included an investment of £100,000 in new machinery. In September 1920 the Kingston factory closed for stocktaking and the company decided to enter voluntary liquidation; the works manager at Kingston announced in a letter to the 1400 employees:

We much regret we find it impossible to reopen the works, as the difficulties caused by restricted credit prevent the company from finding sufficient capital to carry on the business, and it will be therefore wound up.

At a meeting of creditors held in October 1920 it was explained that although the company had previously accumulated a surplus of £900,000 in 1918, following a slump in the sale of motorcycles the company had liabilities of £705,430 (which included £583,510 for excess profits duty) and assets of £862,630. The amount of excess profit duty was being disputed by the company which had already paid £450,000 in duty. The meeting concluded that the best result would be to sell the business as a going concern.

The Ham factory, which was included in 38 acres of freehold land, was sold to Leyland Motors. The newly formed H.G Hawker Engineering Company obtained the Sopwith patent rights and a government contract to refurbish Sopwith Snipe biplanes.

Hawker Engineering

Upon the liquidation of the Sopwith company, Tom Sopwith himself, together with Harry Hawker, Fred Sigrist and Bill Eyre, immediately formed H.G. Hawker Engineering, forerunner of the Hawker Aircraft and Hawker Siddeley lineage. Sopwith was Chairman of Hawker Siddeley until his retirement. Hawker and its successors produced many more famous military aircraft, including the inter-war Hart, and Demon; World War II’s Hurricane, Typhoon, and Tempest; and the post-war Sea Fury, Hunter and Harrier. These later jet types were manufactured in the same factory buildings used to produce Sopwith Snipes in 1918 as Hawker Aircraft bought the Ham Factory when Leyland’s lease expired in 1948

Famous Sopwith Aircraft

Initially, Tom Sopwith himself, assisted by his former personal mechanic Fred Sigrist, led the design of the company’s types. Following a number of pre-war designs for the Royal Naval Air Service, such as the Three-seater and the Bat Boat, Sopwith’s first major success was the fast and compact (hence the name) Tabloid, a design which first showed the influence of the company’s test pilot, the Australian Harry Hawker. A float-equipped version of this aircraft won the Schneider Trophy in 1914. The landplane version was used by both the RNAS and RFC at the start of the war. With higher power and floats, the type evolved into the Sopwith Baby, which was a workhorse of the RNAS for much of the First World War.

Experimentally equipped with three narrow-chord wings and a more powerful engine, the Pup led to the Triplane, which was used by just four squadrons of the RNAS during 1917, but became well known for its startling fighting qualities, put to best use by Raymond Collishaw’s famous ‘Black Flight’ of ‘Naval 10’ (No. 10 Squadron RNAS). This flight was so called due to the black identification colour of the flight’s aircraft, which in turn led to their naming as Black Maria, Black Prince, Black Death, Black Roger and Black Sheep. Such was the impact of this type that it spawned a large number of experimental triplane designs from manufacturers on all sides, although only the Fokker Triplane achieved any subsequent success.

In the early summer of 1917 the twin-gun Camel fighter was introduced. This aircraft was highly manoeuvrable and well-armed, and over 5,000 were produced up until the end of the War. It destroyed more enemy aircraft than any other British type, but its difficult flying qualities also killed very many novice pilots in accidents. It was used, modified, as both a night-fighter and shipboard aircraft, and was flown in combat by the Belgian and American Air Services as well as the British.

Later still in front-line service came the stationary-engined four-gun Dolphin and the ultimate rotary-engined fighter, the Snipe. The Snipe saw little wartime service, being issued only in small numbers to the Front, but William George Barker, the Canadian ace, won a Victoria Cross flying one in an epic single-handed dogfight against enormous odds.

Towards the end of the war the company produced the Cuckoo torpedo-bomber and the Salamander armoured ground-attack development of the Snipe, but these types were too late to see action. 

Many other experimental prototypes were produced throughout the war, mostly named after animals (Hippo, Gnu etc.), leading to some referring to the ‘Sopwith Zoo’.

Following World War I, the Sopwith Snipe was chosen as the standard fighter of the much-reduced Royal Air Force, and soldiered on until finally replaced in the late 1920s.