Supermarine Baby

Supermarine Aviation Works Limited

Company type	Private company
Industry	Aircraft manufacturing
Founded	1916
Founder	Hubert Scott-Paine
Headquarters	Woolston , United Kingdom
Key people	Hubert Scott-Paine (owner), William Hargreaves (lead designer), Harold Bolas (designer overseeing production)
Products	Flying boats, including the Supermarine Baby

Template:Good article Template:Infobox aircraft The Supermarine Baby, also known as the Supermarine N.1B Baby, was a British single-seat flying boat fighter developed during the First World War. It holds the distinction of being the earliest example of such a craft constructed in the United Kingdom. The aircraft was created by Supermarine in response to a 1917 Navy Board requirement that called for a speed of 95 knots (176 km/h; 109 mph), an operational ceiling of 20,000 feet (6,100 m), and the capability to be launched from naval vessels. Upon its maiden flight in February 1918, it ranked among the smallest and quickest flying boats then available.

William Hargreaves, Supermarine’s lead designer, drew inspiration from the AD Flying Boat for this project. The Baby featured folding wings, a sleekly contoured hull, and was powered by a 150 horsepower (110 kW) Hispano-Suiza 8 engine. Only one prototype was constructed by the company, which demonstrated commendable performance during testing phases. In August 1918, the aircraft was upgraded with a more potent Aero engine. Despite its promising attributes, no production orders were placed as the Admiralty opted to deploy the Sopwith Pup and Sopwith Camel fighters from ships instead. Additionally, one of the Baby’s designs served as a foundation for subsequent models such as the Supermarine Sea Lion I, which competed in the 1919 Schneider Trophy contest. It is likely that Supermarine’s future chief designer, Reginald Mitchell, contributed to the Sea Lion’s design and its preparation for this event.

Commission

The Baby was conceptualized and constructed under the leadership of Supermarine’s proprietor, Hubert Scott-Paine, who had become part of Pemberton-Billing Limited in 1911. In June 1916, Scott-Paine acquired the company from its founder, Noel Pemberton Billing, subsequently renaming it Supermarine Aviation Works Limited. Throughout the First World War, the firm maintained its focus on manufacturing and servicing marine aircraft, a fact reflected by its base in Woolston beside the River Itchen, its absence of an aerodrome, and its retention of skilled boat-building personnel. Scott-Paine developed strong connections with the Air Department (AD), which assumed control over the company during wartime.

Distinguished as the United Kingdom’s first single-seat flying boat fighter to be both designed and built domestically, the Baby was created to fulfill Navy Board specification N.1B. Three manufacturers—Supermarine, Blackburn, and Westland—aimed to produce fighters meeting this requirement. The specification called for a single-seat floatplane or flying boat fighter capable of countering German Brandenburg aircraft operating over the North Sea. It needed to operate from the Royal Navy's seaplane carriers, achieve a speed of 95 knots (176 km/h; 109 mph) at 10,000 feet (3,000 m), and reach an operational ceiling of 20,000 feet (6,100 m). The Baby was developed under Air Department contract A.S. 3929.

Supermarine was awarded a contract for three units. To supervise the Baby’s production, the AD assigned one of its principal designers, Harold Bolas, along with his team, to oversee manufacturing at Supermarine.

Design and development

File:Supermarine Baby aircraft.jpg

General arrangement drawings of the Supermarine Baby from a 1920 issue of Aerial Age Weekly

William Hargreaves, who joined Supermarine in 1916 as chief designer, was responsible for the Baby’s design. His work drew inspiration from the AD Flying Boat—a two-seat biplane used for maritime patrol and reconnaissance—which had demonstrated subpar performance. This earlier model featured a flexible tubular fuselage and wings supported by four vertical struts that folded forward.

Hargreaves conceived a pusher biplane configuration with compact single-bay folding wings and a T-tail. The Baby’s streamlined wooden hull was adapted from the design by British naval architect Linton Hope used in the AD Flying Boat. The pilot’s cockpit was positioned at the front of the hull. To reduce spray interference during takeoff, the engine and propeller were strategically placed. Initially, it was equipped with a 150 horsepower (110 kW) Hispano-Suiza engine driving a four-bladed propeller.

Performance tests showed that the Baby could attain speeds of 102 knots (189 km/h; 117 mph) at sea level and 97 knots (180 km/h; 112 mph) at an altitude of 10,000 feet (3,000 m). Its landing speed ranged between 87 to 178 kilometres per hour (54 to 111 mph). The aircraft exhibited a maximum wing loading of 36.5 kg/m² (7.48 lb/ft²).

Operational history

The prototype, assigned the serial number N59, took to the air for the first time following its completion in February 1918. During testing, it demonstrated good handling characteristics along with notable speed and agility; however, it tended to allow water into the cockpit during acceleration. To address this issue, Hargreaves developed at least six different hull design alternatives. A 1920 edition of Flight magazine reported that the aircraft performed two loops in February of that year.

In August 1918, the aircraft was upgraded with a more powerful Sunbeam Arab engine rated at 200 horsepower (150 kW). At that time, it was the smallest and fastest flying boat available, with its evaluation concluding shortly before the Armistice of 11 November 1918. The Baby’s performance was deemed sufficient to warrant a production contract, which was nearing completion by November.

Although designed for wartime use, the Baby did not participate in combat. By late 1918, the Royal Naval Air Service had already adopted Sopwith Pup landplanes for shipboard platform launches, and the success of both the Pup and later the Sopwith Camel, combined with the war’s end, led to cancellation of the N.1B project by the British government. Meanwhile, a second aircraft designated N60 had been constructed but never flown. Instead, N60 was utilized as a source of spare parts to support testing of N59. A third unit, N61, remained unassembled though hull construction had commenced when the programme was terminated.

Legacy

File:Supermarine Single Seater Flying Boat 'A'.jpg

General arrangement drawings for the 'A' Single Seater Flying Boat (The Aeroplane, October 1919)

Among Supermarine’s wartime creations, the Baby likely represents their most successful design during World War I. The design intended for N61 incorporated one of Hargreaves’ refined hull concepts and served as the foundation for Supermarine’s 'A' Single Seater Flying Boat—later renamed the Supermarine Sea Lion I—which competed in the 1919 Schneider Trophy. Additionally, the Baby influenced subsequent models such as the Supermarine Sea King and ultimately the Supermarine Walrus (1933), which became the Royal Navy’s standard catapult-launched artillery spotter aircraft.

The Baby also played a crucial role in advancing flying boats used for Schneider Trophy competitions. Its successor, the Sea King, evolved into the Supermarine Sea Lion II, which marked a significant achievement by becoming the first British aircraft after World War I to win an international contest in 1922.

It is probable that Reginald Mitchell, who joined Supermarine in 1916, contributed to design modifications and preparations related to the Sea Lion.

External links

• Image gallery available on the Seawings official site