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Hawker Hotspur

Twin-Seat, Single-Engine Turret Fighter Prototype Aircraft

Hawker Hotspur

Twin-Seat, Single-Engine Turret Fighter Prototype Aircraft

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



The Hawker Hotspur turret fighter program produced just one flyable prototype for its time in the late 1930s.
National Flag Graphic
ORIGIN: United Kingdom
YEAR: 1938
MANUFACTURER(S): Hawker Aircraft - UK
PRODUCTION: 1
OPERATORS: United Kingdom (cancelled)
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the Hawker Hotspur model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2
LENGTH: 32.81 feet (10 meters)
WIDTH: 40.52 feet (12.35 meters)
HEIGHT: 13.85 feet (4.22 meters)
WEIGHT (EMPTY): 5,798 pounds (2,630 kilograms)
WEIGHT (MTOW): 7,650 pounds (3,470 kilograms)
ENGINE: 1 x Rolls-Royce Merlin II V12 inline piston engine developing 1,030 horsepower and driving three-bladed propeller unit at the nose.
SPEED (MAX): 317 miles-per-hour (510 kilometers-per-hour; 275 knots)
RANGE: 889 miles (1,430 kilometers; 772 nautical miles)
CEILING: 27,887 feet (8,500 meters; 5.28 miles)




ARMAMENT



PROPOSED:
1 x 0.303 caliber (7.7mm) Vickers machine gun in nose.
4 x 0.303 caliber (7.7mm) Browning machine guns in dorsal rear turret (Boulton Paul turret).
VARIANTS



Series Model Variants
• "Hotspur" - Base Project Designation; single flyable prototype completed; written off after crash.


HISTORY



Detailing the development and operational history of the Hawker Hotspur Twin-Seat, Single-Engine Turret Fighter Prototype Aircraft.  Entry last updated on 9/11/2017. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
Prior to World War 2 (1939-1945), the British Air Ministry developed Specification F.9/35 in 1935 to seek out a new, all-modern "turret fighter" with a machine-gun-armed traversing turret as its primary armament. The type would succeed the obsolete line of Hawker "Demon" biplane aircraft then in service and led the storied concern of Hawker, and its legendary designer Sidney Camm, to develop the "Hotspur" around this requirement. However, the aircraft was not a success by any measure and just one flyable prototype was completed before work on the project ended. The contract instead fell to competitor Bolton Paul and their "Defiant" (detailed elsewhere on this site).

The Hotspur appeared at the same time that Hawker was developing its classic Hawker "Hurricane" single-seat, single-engine monoplane fighter. The turret fighter form also took on one engine as its primary propulsion system but sat a crew of two in tandem, the rear gunner in a separate turret enclosure over the aft dorsal spine of the aircraft. The turret was manufactured by Boulton Paul who also incorporated it into their equally-classic Defiant. The Hotspur took on some of the appearance of the Hurricane and sported relative clean lines and a conventional arrangement but was a direct offshoot of the Hawker "Henley", another of the company's flying products which only advanced its career as a target tug through 202 delivered examples.




The Boulton Paul Defiant was developed to the same specification and would find much greater success (over 1,000 units produced) than the Hotspur (single prototype), which labored through a lengthy and unspectacular development process. Work was underway as soon as 1936 and a first-flight, in prototype form, was recorded on June 14th, 1938 (a second contracted-for prototype was eventually cancelled). In comparison, the Defiant recorded its first-flight back on August 11th, 1937 giving the competing design quite the head start.

The Hawker Hotspur was completed with an overall length of 32.9 feet, a wingspan of 40.5 feet and a height of 31.9 feet. Empty weight was 5,800lb against an MTOW of 7,650lb and power was from a single Rolls-Royce Merlin II V-12 inline piston engine of 1,030 horsepower driving a three-bladed propeller unit at the nose. Maximum speed, as tested, reached 316 miles per hour and a service ceiling of 28,000 feet was possible.

In terms of proposed armament, the intended powered turret carried 4 x 7.7mm Browning machine guns which were operated by the rear gunner. The pilot managed a sole 7.7mm Vickers machine gun firing from a nose mounting but this weapon was fixed to fire forward only. There was no bomb-carrying capability built into the Hotspur.

The Hotspur became nothing more than an incomplete combat warplane prototype and even company interest waned as Hawker was fully committed to the much-needed Hurricane fighter for the war effort (and the subsequent Battle of Britain campaign). During what would become the Hotspur's final flight, a gliding test, the engine failed to restart and the pilot successfully crash-landed his aircraft. Though repairable, the Hotspur was not salvaged and was scrapped instead. Before its end, the Hotspur saw its Bolton Paul turret completely removed and the rear position reworked for a more traditional look to better serve testing other components. In this form it was used in evaluating various diving brakes and flaps into 1942 over Farnborough.




MEDIA







Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 400mph
Lo: 200mph
    This entry's maximum listed speed (317mph).

    Graph average of 300 miles-per-hour.
City-to-City Ranges
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LDN
 
  PAR
PAR
 
  BER
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  MSK
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  TKY
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  SYD
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  NYC
Graph showcases the Hawker Hotspur's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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Supported Roles
A2A
Interception
UAV
Ground Attack
CAS
Training
ASW
Anti-Ship
AEW
MEDEVAC
EW
Maritime/Navy
SAR
Aerial Tanker
Utility/Transport
VIP
Passenger
Business
Recon
SPECOPS
X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue