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Handley Page H.P. O/400

United Kingdom (1918)
Picture of Handley Page H.P. O/400 Heavy Bomber Aircraft

For a time, the HP O/400 was the largest aircraft ever produced for the United Kingdom.


Detailing the development and operational history of the Handley Page H.P. O/400 Heavy Bomber Aircraft.  Entry last updated on 7/1/2016. Authored by Staff Writer. Content ©www.MilitaryFactory.com

The O/400 model series by Handley Page aircraft firm was the principle heavy bomber of the RAF by the end of the First World War. The O/400 was directly descended from the previous O/100 model series with the "100" and "400" designations assigned to each model depicting the horsepower output of the engines. Similarities aside, the O/400 not only fitted new engines to the bomber design but the system also had a newly designed bombsight that improved - if ever so slightly - the capabilities of aircraft and crew alike. The heavy bomber would be used in quantity with British forces to which more than 500 examples would be produced along with limited quantities of the type as supplied to by American forces.

The O/400 was a rudimentary design common with World War One standards, though built to an immensely large size - a 100 foot wingspan with a length of nearly 63 feet. The aircraft was crewed by a compliment of three personnel and fitted with two landing gear systems mounting two wheels a piece. The engines set the system apart from the previous O/100 design by mounting the 360hp Rolls-Royce brand Eagle VIII V-12 engines on either side of the fuselage. Wing design was of the typical heavy bomber biplane type, with struts spanning the structures. The aircraft featured a three-rudder, twin-elevator system at rear.

Armament of the mammoth Handley Page O/400 consisted of three Lewis-type machine gun systems mounted at various defensive positions about the fuselage. Ordnance capabilities were impressive with the ability to field up to 16 x 112lb bombs or up to 8 x 250lb bombs. Bombing was accomplished through a LT Commander Wimperis-designed Drift Sight Mk 1A bombsight. This system had the capability to process aerial information for the bomber to utilize in the form of drift, the aircraft's current airspeed and altitude for improved bombing capabilities over its predecessor. In all, the system was fielded in force to the end of the war, seeing full action with no fewer than eleven operational RAF squadrons throughout the English Empire.

Any available statistics for the Handley Page H.P. O/400 Heavy Bomber Aircraft are showcased in the areas immediately below. Categories include basic specifications covering country-of-origin, operational status, manufacture(s) and total quantitative production. Other qualities showcased are related to structural values (namely dimensions), installed power and standard day performance figures, installed or proposed armament and mission equipment (if any), global users (from A-to-Z) and series model variants (if any).






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 (98mph).

    Graph average of 75 miles-per-hour.
Relative Operational Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Handley Page H.P. O/400's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era Impact
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 Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
657
657


  * Commercial Market High belongs to Cessna 172.

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


Altitude Visualization
Small airplane graphic
  Compare this entry against other aircraft using our Comparison Tool  
Supported Mission Types:
Air-to-Air
Interception
Unmanned
Ground Attack
Close-Air Support
Training
Anti-Submarine
Anti-Ship
Airborne Early Warning
MEDEVAC
Electronic Warfare
Maritime/Navy
Aerial Tanker
Utility/Transport
Passenger Industry
VIP Travel
Business Travel
Search/Rescue
Recon/Scouting
Special Forces
X-Plane/Development
National Flag Graphic
National Origin: United Kingdom
Service Year: 1918
Classification Type: Heavy Bomber Aircraft
Manufacturer(s): Handley Page - UK
Production Units: 657
Global Operators:
Australia; China; United Kingdom; United States
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Handley Page H.P. O/400 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
3


Dimension
LENGTH


Feet
62.86 ft


Meters
19.16 m


Dimension
WIDTH


Feet
100.00 ft


Meters
30.48 m


Dimension
HEIGHT


Feet
21.98 ft


Meters
6.7 m


Weight
EMPTY


Pounds
8,501 lb


Kilograms
3,856 kg


Weight
LOADED


Pounds
13,360 lb


Kilograms
6,060 kg

Installed Power - Standard Day Performance:
2 x Rolls-Royce Eagle VIII V-12 engines developing 360 horsepower each.

Performance
SPEED


Miles-per-Hour
98 mph


Kilometers-per-Hour
157 kph


Knots
85 kts


Performance
RANGE


Miles
450 mi


Kilometers
724 km


Nautical Miles
391 nm


Performance
CEILING


Feet
8,497 ft


Meters
2,590 m


Miles
1.61 mi


Performance
CLIMB RATE


Feet-per-Minute
217 ft/min


Meters-per-Minute
66 m/min

Armament - Hardpoints (8):

STANDARD:
5 x 7.7mm Lewis machine guns in nose (2x), dorsal (2x) and ventral (1x) positions.

OPTIONAL:
8 x 250lb bombs OR 16 x 112lb bombs. Up to 2,000lbs of total external ordnance.
Visual Armory:

Graphical image of an aircraft medium machine gun
Graphical image of an aircraft conventional drop bomb munition
Variants: Series Model Variants
• O/100 - Initial Bomber Model on which the development of the 0/400 stemmed from.
• O/400 - Base Series Designation