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Hanriot HD.2

Floatplane Fighter Aircraft

Hanriot HD.2

Floatplane Fighter Aircraft


The Hanriot HD.2 was an extension of the earlier HD.1 with floatplanes added to operate from water sources.
National Flag Graphic
ORIGIN: France
YEAR: 1917
STATUS: Retired, Out-of-Service
MANUFACTURER(S): Hanriot - France
OPERATORS: France; United States

Unless otherwise noted the presented statistics below pertain to the Hanriot HD.2 model. Common measurements, and their respective conversions, are shown when possible.
LENGTH: 22.97 feet (7 meters)
WIDTH: 27.89 feet (8.5 meters)
HEIGHT: 10.17 feet (3.1 meters)
WEIGHT (EMPTY): 1,091 pounds (495 kilograms)
WEIGHT (MTOW): 1,543 pounds (700 kilograms)
ENGINE: 1 x Clerget 9B rotary engine developing 130 horsepower and driving a two-bladed propeller unit at the nose.
SPEED (MAX): 113 miles-per-hour (182 kilometers-per-hour; 98 knots)
RANGE: 186 miles (300 kilometers; 162 nautical miles)
CEILING: 15,748 feet (4,800 meters; 2.98 miles)
RATE-OF-CLIMB: 865 feet-per-minute (264 meters-per-minute)

2 x 0.303 Vickers Machine Guns in fixed, forward-firing mountings synchronized to fire through the spinning propeller blades.
Graphical image of an aircraft medium machine gun

Series Model Variants
• HD.2 - Base Series Designation.
• HD.2C - USN models with wheeled undercarriage.


Detailing the development and operational history of the Hanriot HD.2 Floatplane Fighter Aircraft.  Entry last updated on 1/26/2019. Authored by Staff Writer. Content ©
While the French Air Service of World War 1 (1914-1918) ultimately rejected the Hanriot HD.1 in favor of the SPAD S.VII biplane fighter (both detailed elsewhere on this site), the type went on to see operational service under the national flags of others such as the United States, Belgium, and the Kingdom of Italy with total production reaching 1,200 units before the end. Utilizing the same framework of this very capable biplane, France-based Hanriot developed a purpose-built "floatplane fighter" variant under the designation of "HD.2" before the end of 1917 primarily for use by the French Navy (the "Aeronavale").

The aircraft carried a Clerget 9B rotary engine of 130 horsepower and more-or-less maintained the structural form and function of its predecessor. The single-bay, biplane wing arrangement was of unequal span with forward-cranked parallel struts. The mainplane members were situated well-ahead of midships, concentrating the center-of-gravity towards the front of the aircraft. The engine was fitted to a relatively short nose section with the pilot's open-air cockpit directly aft. The fuselage has slab-sides and was generally devoid of obstructions throughout. The tail unit used the same rounded planes as the HD.1 model. The chief physical difference between the two aircraft, of course, was the HD.2's twin floatplane undercarriage which allowed for the requisite water landings and take-offs. A whole new strut network was affixed to the underside of the aircraft for this purpose.

Despite being a floatplane, the aircraft was intended to retain the fighter-like capabilities of the HD.1 so it was well-armed through 2 x 0.303 caliber Vickers Machine Guns in fixed, forward-firing mounts atop the fuselage and synchronized to fire through the spinning propeller blades.

For its evaluation phase, the HD.2 prototypes were tested with different floatplane lengths, with wheeled landing gear arrangements, and - in some cases - different engine installations. Trials were undertaken at Dunkirk with easy access to the water and under controlled circumstances. This work was had throughout the early-to-mid part of 1918 and continued into September. The Armistice to end the war was eventually signed in November of 1918 but the legacy of the HD.2 went on for a time longer.

Basic production forms of the French Navy were designated simply as "HD.2" but there emerged several other experimental forms. The "HD.12" was a one-off model fitting the Le Rhone 9R rotary piston engine of 170 horsepower as well as a wheeled undercarriage for land-based operations. The "HD.27" was another one-off, this time powered by a Hispano-Suiza 8Ac engine of 180 horsepower. The "H.29" saw two built to a standard intended for ship-borne use, these aircraft being powered by a Hispano-Suiza 8Ab series engine.

As completed, the HD.2 had a crew of one. Structurally, it had a running length of 23 feet, a wingspan of 27.10 feet, and a height of 10.1 feet. Empty weight reached 1,100lb with a Maximum Take-Off Weight (MTOW) of 1,540lb possible. Power was from a Clerget 9B series engine of 130 horsepower used to drive a two-bladed wooden propeller at the nose. Maximum reachable speed was 113 miles per hour with a range out to 185 miles and a service ceiling of 15,750 feet.

The United States Navy (USN) contracted for the purchase of ten HD.2 floatplane fighters which, after they had been delivered an operated for a time, were eventually modified locally to a land-based fighting form by the Naval Aircraft Factory (NAF), operating as land-based trainers out of Langley Field under the designation of "HD.2C". At least one was used to experiment with ship-based / ship-launched aircraft which became a design standard of larger warships seen in the Second World War (1939-1945).


General Assessment

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
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: 120mph
Lo: 60mph
This entry's maximum listed speed (113mph).

Graph average of 90 miles-per-hour.
City-to-City Ranges
Graph showcases the Hanriot HD.2'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 (100)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units

  * Commercial Market High belongs to Cessna 172.

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

Altitude Visualization
Small airplane graphic
Supported Roles
Ground Attack
Aerial Tanker
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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