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AirCo DH.9


Light Bomber Biplane Aircraft


United Kingdom | 1917



"The planned successor to the Airco DH.4, the Airco DH.9 failed in most respects."



Authored By: Staff Writer | Last Edited: 05/16/2018 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The AirCo DH.9 was a further revision of the DH.4 bomber - again headed by famous aviation engineer Geoffrey de Havilland. Design of the new aircraft was handled by the de Havilland company with serial production managed through the Aircraft Manufacturing Company, better known under the acronym of "AirCo" or "Airco". The model was first flown in July of 1917 and introduced into service that same year. It managed only a short post-war career as it was retired from notable service in 1920. 4,091 of the type were ultimately produced.

The DH.9 shared a few of the major design qualities found on the preceding DH.4 including the undercarriage, tail unit, and wings. The DH.9 differed from the DH.4 in that it positioned the gunner and pilot closer together to better communications between the two and was fitted with a more powerful engine. The new fuselage was also intended to streamline the aircraft and take away stresses from the engine. Initial tests revealed that the base DH.9 was simply too underpowered and not much of an upgrade over the DH.4 (which it was meant to replace) thus the system was redesigned as the DH.9A. The DH.9A model attempted to address performance issues and defensive drawbacks by incorporating a lengthened wingspan and a fixed forward-firing machine gun for the pilot. A trainable machine gun was found at the rear gunner/observer's cockpit for protecting the aircraft's critical "six" position.

Not a spectacular aircraft in any one regard, the DH.9 managed a rather poor service record in World War 1 with more losses due to mechanical and performance issues than actual enemy fire. Notable deficiencies in the series lay in its limited service ceiling, fuel consumption at altitudes higher than 10,000 feet, and general engine reliability. If there was one role that the DH.9 proved at least somewhat adequate in was in coastal patrol assignments when hunting down German U-boats - there was a reduced chance of running into enemy aircraft or ground-based fire in this role. Though generally inadequate over most fronts, the DH.9 was naturally more successful in poorly defended areas during the course of the war, this to be true in the Middle East Theater over Palestine and also over Macedonia.

The DH.9 series saw some life after the war in the civil transportation market with many countries. Final production of the DH.9 extended into 1920 - the United States manufactured the DH.9 with the help of the Engineering Division and designated the aircraft as "USD-9" (1,415 were produced by the U.S.). An American-produced engine - the 400 horsepower Packard "Liberty" - was used to power these DH.9A models.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the AirCo DH.9 Light Bomber Biplane Aircraft.
1 x Armstrong Siddeley Puma water-cooled inline piston engine developing 230 horsepower.
Propulsion
113 mph
182 kph | 98 kts
Max Speed
15,518 ft
4,730 m | 3 miles
Service Ceiling
503 miles
810 km | 437 nm
Operational Range
540 ft/min
165 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the AirCo DH.9 Light Bomber Biplane Aircraft.
2
(MANNED)
Crew
30.4 ft
9.27 m
O/A Length
65.4 ft
(19.92 m)
O/A Width
11.3 ft
(3.44 m)
O/A Height
2,235 lb
(1,014 kg)
Empty Weight
3,799 lb
(1,723 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
Available supported armament and special-mission equipment featured in the design of the AirCo DH.9 Light Bomber Biplane Aircraft .
STANDARD:
1 x .303 Vickers machine gun in fixed, forward-firing mounting.
1 OR 2 x .303 Lewis machine gun(s) in rear cockpit position on trainable Scarff ring mounting.

OPTIONAL:
External bomb load up to 460 lb (209 kg).
Variants
Notable series variants as part of the AirCo DH.9 family line.
DH.9 - Base production model based on the earlier DH.4 with decreased area between pilot and gunner positions of which over 3,000 produced.
DH.9A - Improved powerplant
DH.9B - Civilian Conversion Model to accommodate pilot and two passengers.
DH.9C - Civilian Conversion Model to accommodate pilot and three passengers.
DH.9J - Updated powerplant (Armstrong Siddeley Jaguar III radial piston engine generating 385-hp); Pilot trainer.
DH.9J M'pala I - Conversion for South Africa fitted with Bristol Jupiter VI radial piston engine generating 450hp.
M'pala II - Conversion model for South Africa fitted with Bristol Jupiter VIII radial piston engine generating 480hp.
Mantis - Conversion model for South Africa fitted with Wolseley Viper piston engine generating 200hp.
Operators
Global customers who have evaluated and/or operated the AirCo DH.9. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 4,091 Units

Contractor(s): Aircraft Manufacturing Company Ltd (AirCo) / de Havilland - United Kingdom
National flag of Afghanistan National flag of Australia National flag of Belgium National flag of Bolivia National flag of Canada National flag of Chile National flag of Denmark National flag of Estonia National flag of Greece National flag of India National flag of Ireland National flag of Latvia National flag of the Netherlands National flag of New Zealand National flag of Peru National flag of Poland National flag of Romania National flag of the Kingdom of Saudi Arabia National flag of South Africa National flag of the Soviet Union National flag of Spain National flag of Switzerland National flag of Turkey National flag of the United Kingdom National flag of the United States

[ Afghanistan; Australia; Belgium; Bolivia; Canada; Chile; Denmark; Estonia; Greece; India; Ireland; Latvia; Netherlands; New Zealand; Paraguay; Peru; Poland; Romania; Saudi Arabia (Kingdom of Hejaz); Spain; South Africa; Soviet Union; Switzerland; Turkey; United Kingdom; United States ]
Relative Max Speed
Hi: 120mph
Lo: 60mph
Aircraft Max Listed Speed (113mph).

Graph Average of 90 MPH.
Era Crossover
Pie graph section
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
4091
36183
44000
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
Aviation Timeline
EarlyYrs
WWI
Interwar
WWII
ColdWar
Postwar
Modern
Future
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Image of the AirCo DH.9
Image from the Public Domain.
2 / 3
Image of the AirCo DH.9
Image from the Public Domain.
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Image of the AirCo DH.9
Image from the Public Domain.

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
GROUND ATTACK
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The AirCo DH.9 Light Bomber Biplane Aircraft appears in the following collections:
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