The first British military plane to feature a fully retractable undercarriage

Countries & Cities · Published 12 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: In an era of fixed landing gear and wooden frames, the Supermarine Walrus broke new ground as a metal-hulled amphibious biplane. Designed by R.J. Mitchell, it pioneered technologies like enclosed crew accommodation and streamlined wheels—all while serving as a rugged workhorse for maritime patrol and daring air-sea rescues.

Designed by R.J. Mitchell's team at Supermarine, the Walrus (originally named the Seagull V) first flew in 1933. It was born from a private venture to meet a Royal Australian Air Force requirement for an observation seaplane capable of being launched by catapult from cruisers or battleships. While it shared a general layout with earlier models, it introduced several firsts for British squadron-service aircraft: a completely metal fuselage, enclosed crew accommodation, and a fully retractable undercarriage.

Engineering choices were driven by harsh environments. The all-metal hull was constructed from an anodised alloy because wooden structures deteriorated rapidly in tropical conditions. To balance weight and material costs, the Walrus II variant utilized a wooden hull to conserve light alloys. Its unique pusher configuration—mounting the Bristol Pegasus engine at the rear—kept the propeller away from water spray and allowed crew members to stand on the front deck safely while hooking onto shipboard hoisting cables.

The aircraft's versatility was proven in combat and rescue operations throughout World War II. While intended for gunnery spotting, it primarily patrolled for submarines and surface raiders, often equipped with ASV radar by 1941. Furthermore, the RAF Search and Rescue Force utilised it as a main instrument for retrieving individuals from maritime environments. Despite its ruggedness—demonstrated when it survived a wheels-up landing in Portland Harbour in October 1935—pilots famously described it as 'the noisiest, coldest and most uncomfortable' aircraft they had ever flown.

By 1943, catapult-launched aircraft began to be phased out by radar systems on warships. However, the Walrus remained relevant due to its low landing speed, which allowed it to land on carriers without flaps or a tailhook. It eventually saw service in civil capacities in regions like Antarctica before being succeeded by the first generation of helicopters.

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