Aviation / Aerospace

Hanriot HD.3

Twin-Seat Biplane Fighter [ 1917 ]

Fewer than 100 of the Hanriot HD.3 series biplane fighters were built by France for the fighting of World War 1.

Authored By: Staff Writer | Last Edited: 01/27/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

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Hanriot of France developed its single-seat, single-engine HD.1 fighting biplane of World War 1 (1914-1918) for service beginning in mid-1916. While passed on by the French Air Force it went on to stock the inventories of several foreign players of the period including the United States, the Kingdom of Italy, and Belgium. In due course, the same design was outfitted with floats and successfully tested to become the in-service HD.2 (detailed elsewhere on this site) and this form went on to be accepted by the French Navy and, to a lesser extent, the United States Navy. By the fall of 1917, the company was already hard at work on an all-new, twin-seat, single-engine biplane fighter - this to become the "HD.3".

A prototype was made ready before the end of the year and continued Hanriot's experience in biplane fighter development. The engine-of-choice became the Salmson (Canton-Unne) 9Za radial piston engine of 260 horsepower, this used to drive a two-bladed propeller unit at the nose. The biplane wing members were of equal span with single-bays, braced by a conventional parallel strut arrangement and the two of crew sat in tandem, open-air cockpits, the rear gunner's position raised slightly to afford better vision towards the rear of the aircraft. Armament centered on 2 x 7.7mm Vickers Machine Guns in fixed, forward-firing mounts (synchronized to fire through the spinning propeller blades) managed by the pilot and 2 x 7.7mm Lewis Machine Guns on a trainable mounting in the rear cockpit for the dedicated machine gunner. The undercarriage consisted of a conventional two-wheeled/tailskid arrangement for ground-running.

The French Air Service was sold enough on the design that it contracted for 120 in an initial production order during April 1918 when there was still a great need for new advanced fighters to match new German types in turn. Another batch order, this time by the French Navy, added 180 to the number though the Armistice of November 1918 limited the design's reach and production totals with just seventy-five eventually realized for the French Air Service inventory and just a few of the type to reach the French Navy.

Development of the design continued for a time later resulting in the "HD.3bis" night-fighter prototype - with thicker mainplanes and enlarged control surfaces - and the "HD.4", another one-off prototype having twin-floats fitted for on-water service. The related "HD.9 Ap.1" was a dedicated photoreconnaissance mount of which ten were evaluated by the French beginning in November of 1918.

In all, only about ninety or so HD.3 aircraft actually saw the light of day - the end of the war bringing an abrupt end to this capable biplane fighter. The only other notable operator of the series became the Kingdom of Italy where the HD.3 went on to serve with the Aeronautica Militare.©MilitaryFactory.com

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Specifications

Service Year

1917

Origin

France

Status

RETIRED
Not in Service.

Crew

2

Production

90
UNITS

Hanriot - France

(View other Aviaton-Related Manufacturers)

France; Kingdom of Italy

(OPERATORS list includes past, present, and future operators when applicable)

✓ Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.

Length

22.8 ft
(6.95 m)

Width/Span

29.5 ft
(9.00 m)

Height

9.8 ft
(3.00 m)

Empty Wgt

1,676 lb
(760 kg)

MTOW

2,601 lb
(1,180 kg)

Wgt Diff

+926 lb
(+420 kg)

(Showcased structural values pertain to the Hanriot HD.3 C.2 production variant)

Installed: 1 x Salmson (Canton-Unne) 9Za 9-cylinder water-cooled radial piston engine developing 260 horsepower and driving a two-bladed propeller at the nose.

Max Speed

119 mph
(192 kph | 104 kts)

Ceiling

18,701 ft
(5,700 m | 4 mi)

Range

311 mi
(500 km | 926 nm)

Rate-of-Climb

800 ft/min
(244 m/min)

♦ MACH Regime (Sonic)

Sub

Trans

Super

Hyper

HiHyper

ReEntry

♦

(Showcased performance specifications pertain to the Hanriot HD.3 C.2 production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)

2 x 0.303 Vickers Machine Guns in fixed, forward-firing mountings synchronized to fire through the spinning propeller blades.
2 x 0.303 Lewis Machine Guns in trainable mounting at rear cockpit.

Supported Types

Graphical image of an aircraft medium machine gun

(Not all ordnance types may be represented in the showcase above)

Hardpoint Mountings: 0

HD.3 - Base Series Designation.

HD.3 C.2 - Base Production model.

HD.3bis CN.2 - Nightfighter prototype form; revised wing and control surfaces; single example completed.

HD.4 - Floatplane variant of the HD.3 C.2; single example completed.

HD.9 Ap.1 - Single-seat photographic reconnaissance variant.

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.

Overall Rating

The overall rating takes into account over 60 individual factors related to this aircraft entry.

64

Rating is out of a possible 100 points.

Relative Maximum Speed

Hi: 120mph

Lo: 60mph

This entry's maximum listed speed (119mph).

Graph average of 90 miles-per-hour.

City-to-City Ranges

NYC

LON

PAR

BER

MOS

TOK

SYD

LAX

NYC

Hanriot HD.3 C.2 operational range when compared to distances between major cities (in KM).

Max Altitude Visualization

Design Balance

The three qualities reflected above are altitude, speed, and range.

Aviation Era Span

Showcasing era cross-over of this aircraft design.

Unit Production (90)

90

36183

44000

Compared against Ilyushin IL-2 (military) and Cessna 172 (civilian).

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Image from the Public Domain.