×
Military Pay Military Ranks Aircraft Tanks and Vehicles Small Arms Navy Ships
HOME
AVIATION
MODERN AIR FORCES
COUNTRIES
MANUFACTURERS
COMPARE
BY CONFLICT
BY TYPE
BY DECADE
GOLDEN AGE
X-PLANE

de Havilland DH.77


Single-Seat Monoplane Interceptor Prototype Aircraft


Aviation / Aerospace

The de Havilland DH.77 was one of the contenders for a British Air Ministry specification seeking an all-modern interceptor design.



Authored By: Staff Writer | Last Edited: 4/25/2019 | Content ©www.MilitaryFactory.com
In 1927, the British Air Ministry finalized its Specification F.20/27 which sought a lightweight single-seat interceptor aircraft with good rate-of-climb. This specification took over the earlier standing order of F.9/26 from 1926 which called for a "day and night zone fighter" aircraft. Among the responding defense players - Armstrong Whitworth, Bristol, Fairey, Hawker, Saunders, Vickers, and Westland - became the storied concern of de Havilland. The company put forth the "DH.77", a monoplane fighter attributed to W.G. Carter and Major F.B. Halford. A first flight of the aircraft was recorded on July 11th, 1929.

The end-product was of a sleek appearance by late-1920s standards. The fuselage was slim and aerodynamically refined where possible. The engine was fitted to the nose in the usual way and a conventional single-finned plane arrangement was featured at the tail. The wing mainplanes were straight, low-mounted, and fitted slightly ahead of midships. The open-air cockpit, seating one, was also set ahead of the midway point of the fuselage. With the monoplane wings seated low in the arrangement, the aircraft gave the pilot much improved vision out-of-the-cockpit when compared with contemporary biplane types. The undercarriage was fixed, wheeled at the two main members, and of the "tail-dragger" arrangement (a tail skid was used to bring up the rear). Empty listed weight became 1,655lb against an MTOW of 2,300lb.

Dimensions included a length of 24.4 feet, a wingspan of 32.1 feet, and a height of 8 feet. Internally, the lightweight fighter was powered by a Napier "Rapier I" 16-cylinder air-cooled H series engine outputting 300 horsepower and driving a two-bladed propeller unit. Of note was the engine's supercharged status and low-profile design. Performance specs included a maximum speed of 205 miles per hour, a service ceiling up to 26,000 feet, and a rate-of-climb (and interceptor's most important quality) of 1,885 feet-per-minute.

As a military-minded interceptor - that is an aircraft charged with meeting an inbound aerial threat head-on in short order - the DH.77's armament comprised the typical installation of 2 x 0.303 caliber Vickers Machine Guns synchronized to fire from the nose section through the spinning propeller blades. These weapons were installed in fixed, forward-firing mounts.

In keeping with the period, the aircraft was completed in "mixed construction" so metal, fabric, and wood all figured into its form. The wings held two internal steel spars for the needed strength and were further braced by wooden ribs. The entire surface area of the planes were then covered over in fabric. The fuselage was given a steel tube framework and also surrounded by typical wood ribs and over this was set into place the fabric skin.

Only a single flying prototype of this aircraft was ever completed and the Air Ministry took it on (via direct purchase) for the usual testing regime to see what they had - and what could be got from the design in full. The sole specimen survived the official trials but was ultimately passed on. The standing interceptor requirement was later filled by the classic Hawker "Fury" biplane fighter (detailed elsewhere on this site) and the frame of the DH.77 saw continued service as a Napier engine test bed until her time had officially run out by the mid-1930s.


Specifications



Year:
1929
Status
Retired, Out-of-Service
Crew
1
[ 1 Units ] :
de Havilland Aircraft Company - UK
National flag of United Kingdom United Kingdom (retired)
- Fighter
- Interception
- X-Plane / Developmental
Length:
24.44 ft (7.45 m)
Width:
32.15 ft (9.8 m)
Height:
8.04 ft (2.45 m)
(Showcased structural dimension values pertain to the de Havilland DH.77 production model)
Empty Weight:
1,664 lb (755 kg)
MTOW:
2,282 lb (1,035 kg)
(Diff: +617lb)
(Showcased weight values pertain to the de Havilland DH.77 production model)
1 x Napier Rapier I 16-cylinder air-cooled H-engine developing 300 horsepower and driving a two-bladed propeller unit at the nose.
(Showcased powerplant information pertains to the de Havilland DH.77 production model)
Max Speed:
205 mph (330 kph; 178 kts)
Service Ceiling:
26,247 feet (8,000 m; 4.97 miles)
Rate-of-Climb:
1,885 ft/min (575 m/min)
(Showcased performance values pertain to the de Havilland DH.77 production model; Compare this aircraft entry against any other in our database)
PROPOSED:
2 x 0.303 Vickers Machine Guns synchronized to fire through the spinning propeller blades.
(Showcased armament details pertain to the de Havilland DH.77 production model)
DH.77 - Base Project Designation; single flyable prototype completed; later used for engine testing.
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.

Disclaimer | Privacy Policy | Cookies
Military Ranks | Military Pay | Aircraft | Tanks & Vehicles | Small Arms | Navy Ships | American War Deaths | 5-Star Generals | Military Alphabet Code | DoD Terms | Convert Knots to Miles-per-Hour



The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world and WDMMA.org, the World Directory of Modern Military Aircraft.


Facebook Logo YouTube Logo

www.MilitaryFactory.com • All Rights Reserved • Content ©2003-