:Supermarine Sea Lion I

The Sea Lion I was developed to participate as the British entry in the 1919 Schneider Trophy race, that last taken place in 1914, when Britain had been the victors. The 1919 context was organised by the Royal Aero Club.{{sfn|Andrews|Morgan|1981|p=57}}

The new aircraft was based on a version of the Supermarine Baby,{{sfn|Eves|2001|p=52}} which had been designed to meet Navy Board specification N.1B. The prototype Baby was the first British single-seat flying boat fighter aircraft.{{sfn|Lewis|1979|p=126}}{{sfn|London|2003|p=37}} Powered by a {{convert|200|hp}} Napier Lion engine in pusher configuration, the Baby first flew in February 1918 powered with a {{convert|150|hp}} engine.{{sfn|Lewis|1979|p=126}}{{sfn|Allward|1988|p=56}}{{sfn|Bruce|1957|p=647}}

A second Baby that was built (but never flew) was delivered as spare parts to support testing of the prototype.{{sfn|London|2003|p=37}}{{sfn|Pegram|2016|p=22}} A third machine (N61) had yet to be assembled when the N.1B programme was abandoned. N61's design was a modified version of the prototype Baby, and Supermarine featured the design in their 1919 brochure. Named the 'A' Single Seater Flying Boat, it was selected to participate in 1919 Schneider contest.{{sfn|Pegram|2016|p=22}}

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

N61 featured a patented hull design produced by Supermarine's chief designer William Hargreaves in 1918.{{sfn|Pegram|2016|p=22}} The hull of the N61, which was in the form originally designed by Linton Hope for the AD Flying Boat, may have been used for the Sea Lion I.{{sfn|Andrews|Morgan|1981|p=57}}{{sfn|Andrews|Morgan|1981|p=355}}

The Sea Lion was designed with a cross section to the aft (rear) that pointed upwards. The nose was designed to deflect spray.{{sfn|Pegram|2016|p=22}} The wings were newly-designed with a smaller chord than had been used on the original Baby, modified ailerons on the upper wing, and a rudder and elevators that were both enlarged.{{sfn|Pegram|2016|p=22}} The two wings had different span lengths, and the struts connecting them displayed outwards.{{sfn|Andrews|Morgan|1981|p=57}} The Sea Lion was powered with an early example of a Napier Lion engine, loaned by the makers, which had its own mounting.{{sfn|Andrews|Morgan|1981|p=57}}{{sfn|Pegram|2016|p=23}} The fin and rudder were larger than that of the Baby.{{sfn|Andrews|Morgan|1981|p=57}}

Reginald Joseph Mitchell, who began working for Supermarine in 1916 and became the company's chief designer after Hargreaves, is likely to have had an involvement in the design of the Sea Lion, and to have helped prepare it for the contest.{{sfn|Pegram|2016|p=23}}

File:Flight International Magazine 1919-09-18 - Schneider Trophy.jpg contest, as viewed on the day of the contest by a Supermarine aeroplane]]

File:Supermarine Sea Lion I.jpg

Registered as racing flying boat G-EALP, the Sea Lion was entered into the 1919 Schneider Trophy race.{{sfn|Eves|2001|pp=52, 56}} To decide on which airplanes would take part in the race, a competition had to be held, as each participating country was only allowed to enter three craft, and four British companies had planned to enter.{{sfn|Pegram|2016|p=23}} The Sea Lion competed against another biplane, a Avro 539. The Sea Lion took the opportunity to be fitted with a newly-arrived propeller, after the Avro was accidentally damaged before the start of the trials. During the competition, the Sea Lion proved to be slower than the Avro, but was nevertheless selected on the basis of its performance;{{sfn|Pegram|2016|p=23}} the Avro was held in reserve.{{sfn|Andrews|Morgan|1981|p=57}}

On 10 September, the day of the contest,{{cite magazine |title=Airisms from the Four Wings |url=https://archive.org/details/Flight_International_Magazine_1919-08-07-pdf/page/n25/mode/2up?q=|location=London |magazine=Flight |publisher=Royal Aero Club |via=Internet Archive |date=7 August 1919 |page=1063 |access-date=10 August 2021 }} Henri Biard of Supermarine took paying passengers around Swanage Bay in the aircraft.{{sfn|Pegram|2016|pp=23{{ndash}}24}} The start of the race was delayed until around 5{{nbsp}}p.m., because of the foggy conditions.{{sfn|Andrews|Morgan|1981|p=58}}

The Sea Lion arrived at around 1{{nbsp}}p.m. and was tied up alongside a Supermarine vessel, Tiddleywinks. Prior to the start of the race, the Sea Lion remained at sea. It thus avoided the damage caused to its rivals after they landed on the beach from Cowes. The undamaged planes set off, but the thick fog obscured the route of the race, and mid-flight the Sea Lion's pilot, Squadron leader Basil D. Hobbs, was forced to land to recalculate his bearings, which he had lost over Swanage Bay. Upon taking off he inadvertently ripped a hole in the Sea Lion's hull after striking flotsam in the water. The damaged aircraft alighted near Bournemouth Pier for the compulsory first lap landing, but inverted with its tail stuck up in the air and sank, and Hobbs was forced to abandon the race. Hobbs was picked up from the site of the wreck, which was towed to Boscombe Pier and returned to Supermarine's works at Woolston, Southampton. The aircraft was found to be beyond repair. {{sfn|Pegram|2016|pp=23{{ndash}}24}}{{sfn|Andrews|Morgan|1981|p=58}}{{sfn|Eves|2001|pp=55{{ndash}}59}}

The race ended in chaos due to the fog and the results were annulled.{{sfn|Pegram|2016|pp=23{{ndash}}24}} Supermarine's profile was raised from obscurity by the contest, but the loss of the Sea Lion was a blow to the company.{{sfn|Pegram|2016|pp=24, 26}} The damage to the hull of the aircraft was repaired and in 1921 it was donated to the Science Museum in London, where it was put on display. In 1928, with Supermarine's agreement, the now obsolete hull was broken up.{{sfn|Andrews|Morgan|1981|p=59}}

{{Aircraft specs

|ref=Supermarine Aircraft Since 1914.{{sfn|Andrews|Morgan|1981|p=68}}

|prime units?=imp

|crew=1

|length ft=26

|length in=4

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|lower span ft=28

|lower span in=3

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|wing area sqft=380

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|empty weight lb=2000

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|gross weight lb=2900

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|eng1 number=1

|eng1 name=Napier Lion IA

|eng1 type=W-12 water-cooled piston engine

|eng1 hp=450

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|prop blade number=4

|prop name=wooden fixed-pitch propeller

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|endurance=2 hours 30 minutes

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{{aircontent

|see also=

|related=

|similar aircraft=

|lists=

• List of flying boats and floatplanes

}}

{{reflist}}

• {{cite book |last1=Allward |first1=Maurice F. |title=An Illustrated History of Seaplanes and Flying Boats |date=1988 |publisher=Noble & Barnes |location=New York |isbn=978-08802-9-286-3 |url=https://archive.org/details/isbn_9780880292863/page/n5/mode/2up}}
• {{cite book |last1=Andrews |first1=Charles Ferdinand |last2=Morgan |first2=Eric B. |title=Supermarine Aircraft since 1914 |url=https://books.google.com/books?id=p3NTAAAAMAAJ |date=1981|edition=|publisher=Putnam |location=London |isbn=978-03701-0-018-0}}
• {{cite book |last1=Bruce |first1=J. M. |title=British Aeroplanes 1914{{ndash}}18 |date=1957 |publisher=Putnam |location=London |isbn=978-03700-0-038-1 }}
• {{cite book |last1=Eves |first1=Edward |editor1-last=Coombs |editor1-first=L. F. E. |title=The Schneider Trophy Story |date=2001 |publisher=MBI Publishing Company |location=St. Paul, Minnesota |isbn=978-07603-1-118-9 |url=https://archive.org/details/isbn_9780760311189/page/n5/mode/2up?q=}}
• {{cite book |last1=Lewis|first1=Peter M. H. |title=The British Fighter since 1912: sixty-seven years of design and development | url-access=registration |url=https://archive.org/details/britishfightersi0000lewi/page/126/mode/2up?q= |date=1979 |publisher=Putnam |location=London |isbn=9780370302508 |oclc=164626682}}
• {{cite book |last1=London |first1=Peter |title=British Flying Boats |url=https://books.google.com/books?id=uKlTAAAAMAAJ |date=2003 |publisher=Sutton Publishing |location=Stroud, UK |isbn=978-0-7509-2695-9}}
• {{cite book |last1=Pegram |first1=Ralph |title=Beyond the Spitfire: The Unseen Designs of R.J. Mitchell |date=2016 |publisher=The History Press |location=Pegram |isbn=978-0-7509-6515-6}}

• {{cite book |last1=Jackson |first1=A. J. |title=British Civil Aircraft 1919{{ndash}}1972 |volume=3 |date=1974 |publisher=Putnam |location=London |isbn=978-0-370-10014-2 |edition=2nd |pages=56{{ndash}}68|ref=none}}
• {{cite magazine |title=Schneider Cup Contest |url=https://archive.org/details/Flight_International_Magazine_1919-09-18-pdf/page/n3/mode/1up?q= |location=London |magazine=Flight |publisher=Royal Aero Club |via=Internet Archive |date=18 September 1919 |pages=1244{{ndash}}1254 |access-date=10 August 2021 }} An analysis of the 1919 Schneider Cup race from Flight magazine.

{{commons category|Supermarine Sea Lion I}}

• {{cite web |title=Supermarine Sea Lion |url=http://www.britishaircraft.co.uk/aircraftpage.php?ID=200 |website=British Aircraft Directory |access-date=4 June 2020 |archive-url=https://web.archive.org/web/20080206033917/http://www.britishaircraft.co.uk/aircraftpage.php?ID=200 |date=26 March 2005 |archive-date=6 February 2008}}

{{Supermarine aircraft}}

Category:1910s British sport aircraft

Category:Schneider Trophy

Category:Flying boats

Sea Lion I

Category:Single-engined pusher aircraft

Category:Biplanes

Category:Aircraft first flown in 1919

Category:Single-engined piston aircraft