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Armstrong Whitworth F.K.9

Quadruplane Reconnaissance Fighter Prototype

Armstrong Whitworth F.K.9

Quadruplane Reconnaissance Fighter Prototype

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



The Armstrong Whitworth F.K.9 successfully sold the Royal Flying Corps on the idea of a quadruplane fighter - this was realized in the F.K.10 series.
National Flag Graphic
ORIGIN: United Kingdom
YEAR: 1916
STATUS: Retired, Out-of-Service
MANUFACTURER(S): Armstrong Whitworth - United Kingdom
PRODUCTION: 1
OPERATORS: United Kingdom
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the Armstrong Whitworth F.K.9 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2
LENGTH: 22.24 feet (6.78 meters)
WIDTH: 27.89 feet (8.5 meters)
HEIGHT: 11.48 feet (3.5 meters)
WEIGHT (EMPTY): 1,246 pounds (565 kilograms)
WEIGHT (MTOW): 2,039 pounds (925 kilograms)
ENGINE: 1 x Clerget 9Z rotary engine of 110 horsepower driving two-bladed propeller at nose.
SPEED (MAX): 84 miles-per-hour (135 kilometers-per-hour; 73 knots)
RANGE: 211 miles (340 kilometers; 184 nautical miles)
CEILING: 9,843 feet (3,000 meters; 1.86 miles)
RATE-OF-CLIMB: 455 feet-per-minute (139 meters-per-minute)




ARMAMENT



1 x .303 Vickers machine gun in fixed, forward-firing position over the nose, synchronized to fire through the spinning propeller blades.
1 x .303 Lewis Gun on trainable mounting in rear cockpit.
VARIANTS



Series Model Variants
• F.K.9 - Base Series Designation; single prototype completed.


HISTORY



Detailing the development and operational history of the Armstrong Whitworth F.K.9 Quadruplane Reconnaissance Fighter Prototype.  Entry last updated on 1/12/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
There proved plenty of experimentation with multi-winged aircraft designs during World War 1 (1914-1918). The biplane was more or less the standardized fighter/bomber form while some monoplane fighters did go on to see considerable time in the air. Triplanes managed a short, though useful, revolution but quickly fell out of favor. Beyond these categories was the "quadruplane" - four-winged arrangement intended to harness the agility and control offered from use of four parallel planes in the wing structure, this providing for exceptional lifting and turning properties, qualities critical to close-in dogfights. Several firms of the period experimented with such types but many fell by the wayside as being much too impractical for military service.

Armstrong Whitworth of Britain tried its hand at a quadruplane in the form of the FK.9. It was a two-seat, single-engine form intended for reconnaissance and fighter duties. Development was through private venture in the hopes of interesting the Royal Flying Corps on the design. Its offshoot, the FK.10, would become one of the few quadruplane designs of the war to be adopted form formal service.

First-flight of a prototype FK.9 was had in the summer of 1916 and changes were instituted to remedy several issues: the engine cowling was completely reworked and the tail fin given greater surface area. All-new wings were added and these carried larger-area ailerons as well. The undercarriage track was made wider for improved ground running. Power was served from a Clerget 9Z rotary engine of 110 horsepower driving a simple, two-bladed wooden propeller in the nose. The crew of two sat in tandem across two open-air cockpits, these positioned aft of the four horizontal planes cranked forward. Standard armament was 1 x .303 Vickers machine gun in a fixed, forward-firing emplacement operated by the pilot and 1 x .303 Lewis Gun managed from a trainable mounting by the rear gunner / observer.




The FK.9 was officially evaluated at the Central Flying School during November and into December of 1916. It proved worthy enough to warrant a serial production contract for fifty aircraft - though improvements to the design necessitated the change in designation to "FK.10" for these mounts.

A single FK.9 aircraft was built followed by just 8 x FK.10 - the 50-strong order never fulfilled due to the design's heavy drag. None saw combat service in the whole of the war.




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.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 100mph
Lo: 50mph
    This entry's maximum listed speed (84mph).

    Graph average of 75 miles-per-hour.
City-to-City Ranges
NYC
 
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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 Armstrong Whitworth F.K.9's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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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
Supported Arsenal
Graphical image of an aircraft medium machine gun
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.