Boulton Paul Defiant
Night fighter · Boulton Paul Aircraft · United Kingdom
ⓘ licence & credit
RAF (via Wikimedia Commons, Public domain)| Typical crew | 2 |
|---|---|
| Engines | 1 × Rolls-Royce Merlin |
| First flight | 1937 |
| Number built | 1,064 |
Photographs
ⓘ licence & credit
Snapper five (talk) / CC BY-SA 3.0, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_miniature_profile_silhouette.jpgView source & full licence →ⓘ licence & credit
Ragnhild&Neil Crawford from Sweden / CC BY-SA 2.0, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_II_Pavla_1-72-9719_(5)_-_Flickr_-_Ragnhild_%26_Neil_Crawford.jpgView source & full licence →ⓘ licence & credit
Ragnhild&Neil Crawford from Sweden / CC BY-SA 2.0, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_II_Pavla_1-72-9719_(3)_-_Flickr_-_Ragnhild_%26_Neil_Crawford.jpgView source & full licence →ⓘ licence & credit
Ragnhild&Neil Crawford from Sweden / CC BY-SA 2.0, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_II_Pavla_1-72-9719_(2)_-_Flickr_-_Ragnhild_%26_Neil_Crawford.jpgView source & full licence →ⓘ licence & credit
Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_ExCC.jpgView source & full licence →ⓘ licence & credit
Ragnhild&Neil Crawford from Sweden / CC BY-SA 2.0, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Boulton_Paul_Defiant_Airfix_1-72-9745_-_Flickr_-_Ragnhild_%26_Neil_Crawford.jpgView source & full licence →ⓘ licence & credit
Daventry B J (Mr), Royal Air Force official photographer / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:An_air_gunner_of_No._264_Squadron_RAF_about_to_enter_the_gun_turret_of_his_Boulton_Paul_Defiant_Mk_I_at_Kirton-in-Lindsey,_Lincolnshire,_August_1940._CH874.jpgView source & full licence →ⓘ licence & credit
Royal Air Force official photographer, Daventry B J (Mr) / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Aircraft_of_the_Royal_Air_Force,_1939-1945-_Boulton_Paul_P.82_Defiant._CH872B.jpgView source & full licence →ⓘ licence & credit
Royal Air Force official photographer / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Air_Ministry_Second_World_War_Official_Collection_CH886.jpgView source & full licence →ⓘ licence & credit
Royal Air Force official photographer / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Air_Ministry_Second_World_War_Official_Collection_CH876.jpgView source & full licence →ⓘ licence & credit
Royal Air Force official photographer / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:264_Squadron_CH197.jpgView source & full licence →ⓘ licence & credit
San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:15_Boulton_Paul_Defiant_TT_Mk_1_(15650663447).jpgView source & full licence →ⓘ licence & credit
San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:15_Boulton_Paul_Defiant_N3377_(15812158966).jpgView source & full licence →ⓘ licence & credit
San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:15_Boulton_Paul_Defiant_(15215776704).jpgView source & full licence →ⓘ licence & credit
San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons — https://commons.wikimedia.org/wiki/File:15_Boulton_Defiant_Defiant_Mk.Is,_N1536_%27PS-R%27_(15650318708).jpgView source & full licence →About
The Boulton Paul Defiant was an experiment in fighter design that the war quickly overtook. Built to a 1935 requirement, it abandoned forward-firing guns altogether and concentrated its armament in a powered four-gun turret behind the pilot, on the theory that a dedicated gunner could engage bombers while the pilot concentrated on flying.
The idea worked briefly over Dunkirk in May 1940, where German pilots mistook the Defiant for the Hawker Hurricane and were caught out by its rearward-firing turret. But once the Luftwaffe learned to attack from ahead and below — where the Defiant had no guns — its day-fighter career collapsed amid heavy losses. The aircraft found a more useful second life as a night fighter in 1940–42, several fitted with airborne-interception radar, and later served on air-sea rescue and target-towing. It stands as a cautionary tale of a tactical concept outpaced by events.
Sources: This page was compiled from publicly available historical sources, including Boulton Paul Defiant Mk 1 — RAF Museum and Boulton Paul Defiant — Wikipedia. The text is original and has been written from factual source material; no source text has been copied unless specifically quoted and attributed.
Engines
- Rolls-Royce Merlin — 60° liquid-cooled supercharged V12, 27 litres