De Havilland DH106 Comet 3 G-ANLO BOAC Air-Air
De Havilland DH106 Comet 3 G-ANLO BOAC Air-Air
The De Havilland Aircraft Company DH106 Comet 3 (G-ANLO) flew for the first time on 19th July 1954, and was in reality an extensively developed aircraft, derived from the earlier DH106 Comet 1 and 2. 
Fuselage length was increased by 15' 5" to provide accommodation for up to 58 passengers (although this was further increased with the introduction of the DH 106 Comet 4) plus the addition of wing pinion fuel tanks which were introduced to provide extended range capability.
Many regard the DH106 Comet 3 as the most attractive in appearance of all the DH106 Comets, although trials indicated that it lacked the range required for North Atlantic operations.  Further modifications were introduced to generate the DH106 Comet 4, the main production variant utilised by BOAC.  The DH106 Comet 4 had the required performance for non-stop services from London to New York, this service being inaugurated on 4th October 1958.  
In addition to the BOAC fleet, export sales were also made to Aerolineas Argentinas (6 aircraft) and East African Airways (3 aircraft). 
However, the need for a higher capacity aircraft was identified by Capital Airlines in the USA (although their order was subsequently cancelled). The aircraft that duly emerged was the DH106 Comet 4B, which was specifically for BEA operations.  This variant can readily distinguished by its longer fuselage section (118 ft compared with 111 ft 6 in) and the lack of the wing pinion fuel tanks. 18 were built: 14 for BEA and 4 for Olympic Airways.  
The final version the DH106 Comet 4C combined the fuselage of the DH106 Comet 4B, with the wings of the DH106 Comet 4, to produce a long fuselage variant with pinion tanks.  The DH106 Comet 4C was notably successful in the export market with sales to Misrair, Mexicana, Aerolineas Argentinas, Sudan Airways, Kuwait Airways and Middle East Airlines.
DH106 Comet C4 RAF XR399
RAF Transport Command used Comet C4's as Troop Transporters until 1975


DH106 Comet 3
1 Built
Initial designation for development aircraft (G-ANLO) but never put into production.
DH106 Comet 3B
1 Conversion
G-ANLO was converted to Mk 4B specification and redesignated Mk 3B.
DH106 Comet 4
28 Built
Modified DH106 Comet Mk 3 design with different alloy for the fuselage and BOAC put the Mk 4 in service in 1958.
DH106 Comet 4A
Never built
Short range version of the DH106 Comet with longer fuselage & reduced wing span - Launch customer cancelled order so not built.
DH106 Comet 4B
18 Built
Intended for shorter range operations, the shorter wing was kept but the pinion tanks were removed, resulting in a smaller fuel capacity. The fuselage was stretched further.
DH106 Comet 4C
23 Built
A combination of the DH106 Comet Mk 4B and the Mk 4.
DH106 Comet C.4
5 Built
The DH106 Comet Mk C.4 was the DH106 Comet Mk 4C operated by the RAF. A total of 5 Mk C.4s were built.
DH106 Comet 5
Never built
Project to counter the success of the DC-8 and the B-707 but never built.
HS801 Nimrod
2 built
DH106 Comet 4C modified as prototypes for a maritime patrol for the Royal Air Force.
HS801 Nimrod is dealt with under Hawker Siddeley


Specification (DH106 Comet 4)

Powerplant                             Four 10,500 lbst RR Avon 524 jet engines 
Span 114 ft 10 in
Maximum Weight 160,000 lb
Capacity 60 to 76 passengers
Cruising Speed 503 mph
Range (full load) 3,225 miles



DH106 Comet 4c
(G-BDIX / XR399)
National Museum of Flight, East Fortune, Scotland, UK
DH106 Comet 4
Imperial War Museum, Duxford, Cambs UK
DH106 Comet 4b
Science Museum, Wroughton, Wiltshire, UK
DH106 Comet 4c
(G-BIDW / XR398)
Flugausstellung Hermeskeil, Rhineland-Palatinate, Germany
DH106 Comet 4c
(G-CPDA / XS235)
Bruntingthorpe Aerodrome, Brunting Thorpe, UK
DH106 Comet 4c
Museum of Flight, Seattle, Washington, USA
A number of nose and fuselage sections are also preserved.


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