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Handley Page HP.21 / Type S (HPS-1)

Single-Seat, Single-Engine Monoplane Fighter

Handley Page HP.21 / Type S (HPS-1)

Single-Seat, Single-Engine Monoplane Fighter

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



The only foray into fighter design attempted by Handley Page of Britain was the HPS-1 - this intended for service with the United States Navy during the 1920s.
National Flag Graphic
ORIGIN: United Kingdom
YEAR: 1924
STATUS: Cancelled
MANUFACTURER(S): Handley Page Aircraft - UK
PRODUCTION: 2
OPERATORS:
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the Handley Page HPS-1 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 1
LENGTH: 21.49 feet (6.55 meters)
WIDTH: 29.27 feet (8.92 meters)
HEIGHT: 9.58 feet (2.92 meters)
WEIGHT (EMPTY): 1,323 pounds (600 kilograms)
WEIGHT (MTOW): 2,039 pounds (925 kilograms)
ENGINE: 1 x Gwynne (Bentley) BR.2 rotary engine developing 230 horsepower and driving a two-bladed propeller unit at the nose.
SPEED (MAX): 147 miles-per-hour (236 kilometers-per-hour; 127 knots)
RANGE: 435 miles (700 kilometers; 378 nautical miles)
CEILING: 20,997 feet (6,400 meters; 3.98 miles)
RATE-OF-CLIMB: 1,800 feet-per-minute (549 meters-per-minute)
ARMAMENT



PROPOSED:
2 x 0.30 caliber (7.62mm) Marlin Machine Guns in fixed, forward-firing mountings over the nose and synchronized to fire through the spinning propeller blades.
Graphical image of an aircraft medium machine gun
VARIANTS



Series Model Variants
• Type S - Base Series Designation.
• HPS-1 - USN designation; two flyable prototypes completed and tested.
• HP.21 - Retrospective redesignation of Type S.


HISTORY



Detailing the development and operational history of the Handley Page HP.21 / Type S (HPS-1) Single-Seat, Single-Engine Monoplane Fighter.  Entry last updated on 1/29/2019. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
Heading into the 1920s, the United States Navy (USN) looked to a new, all-modern fighter type with a dual-role capability in mind. This single-seat, single-engine mount would be of standardized design for equipping a wheeled undercarriage for land-based service or twin floats for operating on water. In 1921, the requirement was fleshed out and the competition was open to both local aero-industry as well as those with wartime experience in Europe.

The British concern of Handley Page, founded back in 1909, responded with a modern monoplane of advanced design for the period. The fuselage was well-streamlined and incorporated the powerplant at the extreme front end of the design in the usual way with the open-air cockpit positioned just aft. The pilot sat behind a windscreen and ahead of a raised section of the dorsal spine to protect the head and neck from violent forces or rollovers. The fuselage tapered elegantly to the tail to which a high-reaching, large-area, single-finned rudder arrangement was set in place. The wing mainplanes were set low against the sides of the fuselage, though positioned nearly at the nose which drove center mass considerably forward. The undercarriage was a twin-wheeled, strutted arrangement under the nose with a skid installed at the underside of the tail. As stated, the aircraft would be able to swap out the wheeled undercarriage for twin floats for water landings. Construction was largely of wood with plywood skinning used at both the wings and fuselage.

The aircraft was planned from the outset to carry a 400 horsepower output engine through its serial production models but prototypes were powered by the lower-rated Gwynne (Bentley) BR.2 rotary engine of 230-232 horsepower used to drive the two-bladed propeller unit at the nose.

As with other fighters of the period, this monoplane would be capably armed through a pairing of machine guns in fixed, forward-firing mounts set over the nose and synchronized to fire through the spinning propeller blades. Based on the local USN requirement, these weapons were to be 2 x 0.30 caliber (7.62mm) Marlin Machine Guns (as opposed to the popular British Vickers used across European fighter designs).

Internally, the aircraft was known to Handley Page as the "Type S".

Three prototypes were contracted by the USN under the local designation of "HPS-1" (for "Handley Page Scout"). The first of these was readied and flown for the first time on September 7th, 1923 but its handling (particularly in the realm of directional stability) left something to be desired so various fixes were enacted in an attempt o resolve the issues. The second prototype was given an advanced mainplane form in which dihedral (upward angle) was six degrees. This model was tested beginning in February of 1924.

It was this prototype that, with a ballast added to simulate the required USN war load, hard-landed during evaluations, its undercarriage collapsing as a result. The accident more or less spelled the death knell for this monoplane program and third prototype, to feature the requisite twin floats, was never realized. The Type S became Handley Page's only attempt at a frontline fighter - the firm known largely for design and construction of oversized aircraft more suitable for the bombing role than one-on-one combat. In later literature, the Type S would be referred to as the "HP.21".

As completed, the stylish, racer-like aircraft had a running length of 21.5 feet, a wingspan of 29.2 feet, and a height of 9.6 feet. Empty was 1,320lb with a Maximum Take-Off Weight (MTOW) of 2,030lb. It managed a maximum speed of 147 miles-per-hour with a service ceiling of 21,000 feet and a rate-of-climb nearing 1,800 feet-per-minute. Flying endurance was up to three hours on internal fuel.




MEDIA





General Assessment
Firepower  
Performance  
Survivability  
Versatility  
Impact  


Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
MF Power Rating
48
The MF Power Rating takes into account over sixty individual factors related to this aircraft entry. The rating is out of 100 total possible points.
Relative Maximum Speed
Hi: 150mph
Lo: 75mph
This entry's maximum listed speed (147mph).

Graph average of 112.5 miles-per-hour.
City-to-City Ranges
NYC
 
  LDN
LDN
 
  PAR
PAR
 
  BER
BER
 
  MSK
MSK
 
  TKY
TKY
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Handley Page HPS-1'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 (2)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
2
2

  * Commercial Market High belongs to Cessna 172.

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


Altitude Visualization
Small airplane graphic
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
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.


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