The 125 is one of a unique group of aircraft that can be claimed by up to 5 different manufacturers (De Havilland, Hawker Siddeley, British Aerospace, Raytheon and Hawker Beechcraft) all having played a role in its development. For the purposes of this historical website however, we list the aircraft as the De Havilland 125 being its designation on the date of its first flight.
De Havilland DH125
Initially known as the Jet Dragon, the DH125 was one of the first generation of executive jets and its success was such that derivatives of the type remained in production some 50 years after its first flight in 1962. It is a low-winged, twin rear jet engined monoplane, with a slightly swept wing and large slotted flaps for ease of operation in and out of small airfields.
The type was not the first executive jet however, being pre-dated by both the Jetstar and T-39 Sabreliner but it is surely the most long-lived of the breed.
Designed by De Havilland Aircraft Company at Hatfield to replace the piston engined De Havilland Dove, it was intended to meet a list of variables demanded by the succesful business user including a 1,000+ mile range, speed and efficient economics.
The prototype DH125 (G-ARYA) first flew on 13th August 1962 by when De Havilland had already come under the control of the Hawker Siddeley Group. Hawker Siddeley had initially continued with the traditional constituent company names but when Hawker Siddeley Aviation began trading in 1964, the original parent firm’s names were no longer used. The aircraft name was changed to the HS125 and production began at the Broughton factory, near Chester (now the home of Airbus).
The prototypes were of shorter wingspan than the production models and were powered by the 3,000 lbst Viper 20 whilst Production aircraft up to and including the Series 400 used the Viper 520 or 522 with thrust progressively increasing to 3,600 lbst per engine.
Hawker Siddeley HS125 / BAe125
The HS125 came into being after De Havilland was absorbed into the Hawker Siddeley in 1963 although designations become mixed over the next 30 years between DH125, HS125 and British Aerospace 125.
Just eight Series 1 aircraft were built before being superceded by the more powerful Series IA (A denoting America) and Series 1B (B denoting the rest of the world). The RAF were significant buyers of the 125, operating the aircraft in airborne training and air force navigation roles, these being designated HS125 Dominie T1 and serving for over 45 years before retiring in 2011.
Twenty Series 2 aircraft were purchased by the Royal Air Force as the Dominie, powered by the 3,000 lbst Viper 301. The first Dominie (XS709) flew for the first time on 30th December 1964. These were followed by the Series 3, 3A, 3B with 3,360 lbst Viper 522 engines (a total of 64 built).
Progressive development under Hawker Siddeley and BAe saw the introduction of the Srs 400 (117 built), and the Series 600 (70 aircraft, prototype G-AYBH, Viper 601 engines), Series 700 (215 built, prototype G-BEFZ), Series 800 (more than 275 built, prototype G-BKTF) and 1000 (52 built, prototype G-EXLR).
The aircraft saw major success in the USA with over 400 of the 650 aircraft completed to date being flown in the US. At its peak one aircraft was being sold every 7 days.
Hawker Siddeley became part of British Aerospace upon its creation in 1977 and the versions that appeared after that date are predominantly BAe125's, although it was often still marketed as the HS or Hawker 125.
British Aerospace continued the type’s development under BAe Corporate Jets Ltd at Hatfield with production continuing at Broughton. A concerted sales effort was carried out in the early 1990's incorporating celebrity owners such the late Ayrton Senna and with a fast expanding business jet market, the 125 saw continued success around the world.
During the 1990s, British Aerospace had 2 variants in production with the 125-800 and the 125-1000 (which had first flown on 16th June 1990) the latter featuring the Pratt & Whitney Canada PW300 engine which gave it inter-continental ability.
Following the sale of BAe Corporate Jets to the Raytheon Corporation in June 1993, production and development continued in the United States as the Hawker 800 and Hawker 1000.
The Series 800 had a further engine upgrade, increase in wingspan and tailfin extension. The prototype (G-BKTF) was flown on 26th May 1983 and the type provided the basis of the C-29A, purchased by the USAF to replace their Lockheed Jetstar communications aircraft.
RAYTHEON / BEECHCRAFT
Beechcraft became a US sales partner, with aircraft sold in the United States being referred to as Beechcraft Hawker BH125. Beechcraft became part of the Raytheon Group and after the sale of BAe Corporate Jets to Raytheon Corporation in June 1993, development of the type continued under Raytheon Hawker and Raytheon designations.
After further financial reorganisation, development of the type continued under the name Hawker Beechcraft.
The 1,000th aircraft of the HS125 family was delivered in April 1998. It is a tribute to the initial design that it should achieve such longevity through progressive development and remain competitive to the present day. Including subsequent developments through Raytheon and Hawker Beechcraft, the production total is around 1,700 aircraft.
Variants & Numbers built
|Srs 1||First version, powered by 3,000 lbst Viper 20 or 520 engines. 10 built, including 2 prototypes and 8 production aircraft|
|Srs 1A/1B||Upgraded Bristol Siddeley Viper 521 or 522 engines with 3,100 lbst thrust each, and five cabin windows instead of six. Srs 1A for US FAA certification (62 built), Srs 1B for sale elsewhere (15 built), total 78 aircraft|
|Srs 2||Navigation trainer for RAF (20 built), with service designation Dominie T.1, powered by 3,000 lbst Viper 301 engines|
|Srs 3A/B||Viper 522-powered variant with increased take-off weight of 21,700 lb. 2 Srs 3, 13 Srs 3A and 15 Srs 3B for non-US sale, total 30 aircraft|
|Srs 3A/RA and 3B/RA||Series 3 with max take-off weight of 22,800 lb and extra 112 gal ventral tank. 20 Srs 3A/RA and 14 Srs 3B/RA for non-US sale, total 34 aircraft|
|Srs 400A and 400B||Increased maximum weights and outward-opening main entry door. From 1970 the Srs 400A aircraft for US were sold as the Beechcraft Hawker BH125 Srs 400A. 69 Srs 400A and 48 Srs 400B for non-US sale, total 117 aircraft|
|Srs 401B||Increased maximum weights|
|Srs 403B||Increased maximum weights|
|HS125 CC1||RAF designation for Srs 400 communication aircraft|
|Srs 600A and 600B||Viper 601-22 engines, increased weights and operating speeds, 3ft 1in fuselage stretch to increase capacity to 14 passengers, increased fuel capacity and improved aerodynamics. From 1976 the Srs 600A aircraft sold as the Beechcraft Hawker BH125 Srs 600A. 35 Srs 400A and 35 Srs 400B for non-US sale, total 70 aircraft|
|HS125 CC2||RAF designation for Srs 600 communications aircraft|
|Srs 700A and 700B||Honeywell TFE731-3RH turbofan engines of 3,720 lbst thrust each, first flight 19 June 1976. Maximum take-off weight 25,500 lb. 151 Srs 700A and 64 Srs 700B for non-US sale, total 215 aircraft|
|BAe 125 CC3||RAF designation for Srs 700B communications aircraft|
|BAe 125 800||Increased wingspan, streamlined nose, tailfin extension, increased fuel capacity, upgraded engines, first flight 26 May 1983.|
|Hawker 800||Final variant of the BAe 125 800 series. More than 275 built|
|Hawker 800XP||TFE731-5BR1H turbofan engines with 4,660 lbst thrust each|
|Hawker 800SP and 800XP||BAe 125 800 and Hawker 800XP aircraft fitted with winglets|
|Hawker 900XP||850XP with Honeywell TFE731-50R turbofan engines for increased hot/high performance and longer range and modified avionics|
|Hawker 750||A derivative of the Hawker 800XP with a lightweight interior and baggage pannier replacing the rear ventral fuel tank|
|C-29A||United States military designation for a derivative of the BAe 125 800|
|U-125||BAe 125 800 based flight inspection aircraft for Japan (similar to C-29A)|
|U-125A||Hawker 800 based search and rescue aircraft for Japan, equipped with the APS-134LW radar system|
|BAe 125 Srs 1000A and 1000B||Intercontinental version of the Srs 800, 2ft 9in fuselage stretch to increase capacity to 15, increased fuel capacity, Pratt & Whitney Canada PW-305 turbofans 5,200 lbst thrust each, first flight 16 June 1990, 52 built|
|Hawker 1000||BAe 125-1000 after 1994|
|Srs 1B||Srs 400B||Srs 600|
|Powerplant||Two 3,100 lbst Rolls-Royce Viper 521/522||Two 3,600 lbst Rolls-Royce Viper 522||Two 3,750 lbst Rolls-Royce Viper 601-22|
|Span||47ft 0 in||47ft 0 in||47ft 0 in|
|Maximum Weight||21,200 lb||23,300 lb||25,000 lb|
|Capacity||6 to 8 passengers||7 to 10 passengers||8 to14 passengers|
|Maximum Cruise||472 mph||510 mph||522 mph|
|Range||1,930 miles||1,940 miles||1,796 miles|
There are numerous aircraft of the DH125 family still flying around the world. A small number of aircraft are also displayed in museums and the list below details some UK examples.
HS125 Series 1
Midland Air Museum, Coventry
DH125 Series 1
De Havilland Museum, London Colney
HS125 Series 1
Science Museum, London
HS125 T.1 Dominie
RAF Museum, Cosford