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De Havilland D.H.4A

Страна: Великобритания

Год: 1919

De Havilland - D.H.16 - 1919 - Великобритания<– –>De Havilland - D.H.9B / D.H.9C - 1919 - Великобритания


A.Jackson De Havilland Aircraft since 1909 (Putnam)


De Havilland D.H.4A

  Formed in March 1919 under the command of Major J. R. McCrindle to meet increased cross-Channel passenger traffic arising from the Armistice, No. 2 (Communication) Squadron, 86th Wing, R.A.F. operated between Kenley and Buc, near Paris with D.H.4s. During the sittings of the Peace Conference a daily courier and mail service was operated in each direction and many Cabinet Ministers availed themselves of this new means of rapid transport, including Mr. Bonar Law, Mr. Winston Churchill, Lord Milner, Major General Sykes and W. M. Hughes, Prime Minister of Australia. At the special request of Mr. Bonar Law, a number of Eagle VIII powered D.H.4s were modified to accommodate a Minister and his secretary face to face in a glazed cabin so that work and conversation might be continued in comfort during the flight. This cabin was a light fabric covered wooden structure fitted with sliding Triplex windows, the starboard side and roof being hinged to fold upwards for entry and exit. A curved decking then faired the cabin neatly into the tail unit. Normal D.H.4 fuel tanks were retained behind the pilot and the two familiar wind driven fuel pumps were mounted above them, but to compensate for the weight of the extra passenger so far back, the aircraft was re-rigged with the upper mainplane 12 inches aft of its usual position. Thus, unlike the D.H.4, the cabin model was unstaggered and therefore a major variant to which the designation D.H.4A was allotted.
  Under the command of Wg. Cdr. W. Harold Primrose, the Communication Squadron made history on June 28, 1919 not only by flying four D.H.4As in line astern over the Palace of Versailles during the signing of the Peace Treaty but also by carrying Mr. Bonar Law from Buc to Kenley with the Prime Minister's historic letter to the King advising him that the Treaty had just been signed. When the squadron disbanded in September 1919 the D.H.4As were sold to Handley Page Ltd. among hundreds of other war surplus machines.
  In July 1919 four new D.H.4s from the Glendower production line were also converted into D.H.4As for Airco's operating subsidiary Aircraft Transport and Travel Ltd. and flew initially with enlarged military serial numbers. Piloted by Capt. E. H. 'Bill' Lawford, one, G-EAJC, is now famous as the machine which carried G. M. Stevenson-Reece of the Evening Standard and a consignment of grouse, newspapers, leather and Devonshire cream from Hounslow to Le Bourget in 2 hours 30 minutes on August 25th.
  In the same month another D.H.4A, G-EAHG, was demonstrated by H. J. Saint at the First Air Traffic Exhibition (ELTA) at Amsterdam and in the following October at Interlaken, Switzerland by Major Stewart-Wortley. On November 10th, its sister craft 'HE carried the first civilian air mail to France at a fee of 2/6 per ounce. Unfortunately both 'HE and HG were lost in serious crashes while trying to maintain their schedules without wireless during the appalling winter of 1919, and were replaced by the open cockpit D.H.4s G-EANK and 'NL mentioned on page 76. All A.T. & T. aircraft were based at Hendon, positioning flights being made to Hounslow to pick up passengers and clear Customs until the new terminal aerodrome opened at Plough Lane, Croydon on April 1, 1920. The D.H.4s then operated both to Le Bourget and Schiphol but with fares at 20 guineas a head, could not compete with subsidised foreign air lines and were scrapped when A.T. & T. Ltd. went into liquidation on December 15, 1920.
  A number of nil hour D.H.4s had also been obtained by Handley Page Ltd. direct from the works of Waring and Gillow Ltd., and one of these was converted to D.H.4A standard as G-EA VL for use on the Cricklewood-Le Bourget and Schiphol services of Handley Page Transport Ltd. On December 4. 1920 piloted by Lt. Vaughan Fowler, it created a record by flying to Paris in half a gale with two passengers in an hour and 48 minutes. Two other D.H.4As. O-BARI and O-BATO. were also produced for the company's Belgian customer SNETA, which used them on the Brussels-Croydon route in 1920-21. They were joined in April 1921 by one of the Communications Squadron D.H.4As F5764, acquired by Handley Page Ltd. among the surplus stock and reconditioned for civil use as G-EA WH.
  Another of the original military D.H.4As was shipped to Buenos Aires by Maj. S. G. Kingsley of the River Plate Aviation Co. Ltd., who in August 1920 made a pioneer business trip of 1,250 miles from Buenos Aires to Porto Alegre on charter to an Argentine bank. In the following year this D.H.4A was joined by a D.H.6 and a D.H. 16 which together covered a total of 40,000 miles in the Argentine, Brazil and Uruguay.
  One other and better known D.H.4A also existed, in the shape of the Instone D.H.4 G-EAMU mentioned on page 73, fully converted to D.H.4A standard at Hamble by A. V. Roe and Co. Ltd. in February 1921. Renamed "City of York" it flew the Croydon-Paris route in the livery of Instone Air Line Ltd.. and made charter flights to the North and to Ireland. After reconditioning at Northolt by the Central Aircraft Company, 'MU made history on September 8-9, 1922 by flying from Croydon to Renfrew and back, piloted by Capt. F. L. Barnard, at an average speed of 123 m.p.h. to win the first of all the King's Cup Races.

SPECIFICATION AND DATA
  Conversions by:
   The Aircraft Manufacturing Co. Ltd., Hendon, London, N.W.9
   Handley Page Ltd., Cricklewood, London, N.W.2
  Power Plant: One 350 h.p. Rolls-Royce Eagle VIII
  Dimensions:
   Span 42 ft. 4 5/8 in. Length 30 ft. 6 in.
   Height 11 ft. 0 in. Wing area 434 sq. ft.
  Weights: Tare weight 2,600 lb. All-up weight 3,720 lb.
  Performance: Maximum speed 121 m.p.h.
  Production:

RAF. Serial C. of A.
and Registration Issued Remarks
F2694 G-EAHG 12.8.19 AT. & T. Ltd., forced down in the English Channel 29.10.19
F2699 G-EAHF 12.8.19 AT. & T. Ltd., crashed at Caterham 11.12.19
F2702 G-EAJC 19.8.19
F2704 G-EAJD 25.8.19 AT. & T. Ltd., scrapped 11.20
F5764 G-EAWH 18.4.21 Handley Page Ltd., scrapped 1922
H5905 G-EAVL 11.11.20 Handley Page Ltd., crashed 4.21
H5928 O-BARI SNETA, burned in hangar fire at Brussels 27.9.21
H5929 O-BATO - " -
H5939 G-EAMU 19.2.20 Instone Air Line Ltd. "City of York"; to Imperial Airways Ltd. 10.6.24

  Service Use: at least F2663. F2664. F2665, F2681, F5764,115894 and H5934 by No.2 (Communication) Squadron. H5894 crashed into the English Channel 15.5.19 with the loss of Capt E. B. B. Jefferson and M r A. Aarosohn, the Zionist leader and agricultural expert.


O.Thetford Aircraft of the Royal Air Force since 1918 (Putnam)


DE HAVILLAND 4A

  This special version of the D.H. 4 bomber accommodated two passengers in the cabin behind the pilot and was operated by No. 2 Communications Squadron, 86th Wing, R.A.F., on communications flights between Kenley and Buc, near Paris, during the Peace Conference in 1919. The unit was disbanded in September 1919. Thirteen D.H. 4s were converted, serialled F 2663, F 2664, F 2665, F 2681, F 2694, F 2699, F 2702, F 2704, F 5764, H 5905, H 5928, H 5929 and H 5939. One 360-h.p. Rolls-Royce Eagle VI. Maximum Speed, 121 m.p.h. leaded weight, 3,720 lb.


Журнал Flight


Flight, January 23, 1919.

THE ENCLOSED D.H. 4

  IN our issue of April 19, 1917, we commenced a series of articles describing the "Totally-Enclosed" aeroplanes that had been built up to that time. We then pointed out that when the problems of peace flying have to be tackled, there is every probability that the occupants of an aeroplane will be comfortably seated inside a cabin, out of the rush of air. This appears now to have come about, as instanced by the Airco or D.H. 4 biplane, which has been converted into a comfortable touring machine, seating two passengers inside a cabin provided with windows. These machines are intended to take Peace Delegates and their secretaries to and from Paris. The simple manner in which this conversion into an enclosed machine has been carried out will be clear from the photographs.


Flight, October 2, 1919.

THE "ARRIVAL" OF THE REGULAR AIR SERVICE

The de H. (Airco) 4A
  has been altered for passenger-carrying by doing away with the stagger, and by raising the deck of the fuselage to form a roof over the cabin. The pilot occupies his original position between the planes, while the cabin is well aft, clear of the trailing edge of the wings. The two passengers face one another, the front one facing aft. Entrance to the cabin is obtained through the roof, which is hinged to fold back, and a short ladder of tubing leads up to the cabin. The engine is a Rolls-Royce "Eagle," mounted behind a nose radiator. As fitted up for the London-Paris service, the D.H.4A has a weight of 2,600 lbs. empty but including water, and with pilot, two passengers, and fuel for a 3-hours' flight, the weight "all up" is about 3,720 lbs. This gives a loading of about 8.6 lbs. per sq. ft., so that the machine does not land at an unusually high speed, although the loading is by no means light. However, at the end of the journey the fuel will have been used up and the loading be somewhat heavier.

A.Jackson - De Havilland Aircraft since 1909 /Putnam/
F2664, "H.M.A.P. Lady Iris", one of the D.H.4As used on the cross-Channel services of No.2 (Communications) Squadron, R.A.F., in 1919.
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
F2665, third D.H.4A conversion for No. 2 (Communication) Squadron.
Jane's All The World Aircraft 1919 /Jane's/
AN AERIAL LIMOUSINE. - A D.H.4 converted into an enclosed passenger carrier. The pilot is, however, left out "in the draught."
An "Airco" De H.4 (375 h.p. "Eagle" Rolls-Royce) Converted to Passenger Carrying Purposes for use by No 2 Communications Squadron, RAF, to fly between Kenley and Buc during Peace Conference negotiations.
Журнал - Flight за 1919 г.
The D.H.4 ENCLOSED MACHINE CLIMBING. - The manner in which the two passengers are seated facing one another is clearly seen in this photograph.
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
F2699 refuelling at Marske-by-the-Sea, Co. Durham, early in 1919. It became G-EAHF with AT. & T. Ltd. in the following August.
Журнал - Flight за 1919 г.
SOME MORE BRITISH MACHINES AT THE E.L.T.A. AERODROME: 2. The Airco 4A
Журнал - Flight за 1919 г.
MAJ. STUART-WORTLEY'S D.H 4a AT INTERLAKEN, SWITZERLAND: Maj. Stuart-Wortley took this machine over with a view to giving demonstration flights
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
Aircraft Transport and Travel Ltd.'s second D.H.4A. G-EAHG, during demonstrations at Interlaken in October 1919.
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
G-EAJC, the D.H.4A in which E. H. Lawford flew the first British commercial service from Hounslow to Le Bourget on August 25, 1919. The former R.A.F. serial F2702 is visible on the rudder.
P.Lewis - British Racing and Record-breaking Aircraft /Putnam/
Winner of the first King's Cup Race, the blue and silver D.H.4A G-EAMU City of York flown by Capt F. L. Barnard at 123,6 mph.
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
The Cricklewood-based D.H.4A G-EAVL used by Handley Page Transport Ltd. from November 1920 until April 1921.
Журнал - Flight за 1919 г.
Hounslow - Switzerland: Mr. Stewart Wortley, who is the Swiss representative of Aircraft Transport and Travel, Ltd., about to leave for Switzerland.
Журнал - Flight за 1919 г.
The New Mode of Travel. - Three Generals flew over to Hendon on Saturday from Stonehenge in a converted de H. 4, piloted by Mr. M. D. Manton of the Aircraft Manufacturing Co.
Журнал - Flight за 1919 г.
THE LONDON-PARIS AIR SERVICE: (1) Mr. M. D. Manton discussing matters with Capt. Baylis as the latter is leaving for Paris on a de H. (Airco) 4A. (2) Lieut. Eric Lawford has just arrived with the mail from Paris in a de H. (Airco) 4A. (3) The Airco 4A just before leaving for Paris.
Журнал - Flight за 1919 г.
FIRST INTERNATIONAL AERIAL MAIL: This week marks a milestone in aviation, inasmuch as the commencement ot official international mail-carrying was inaugurated. Our photographs show the Paris mails being loaded into an Airco 4A, and the Government pennant, bearing the legend, "Royal Mail," being fixed to the rudder of the machine
A.Jackson - De Havilland Aircraft since 1909 /Putnam/
Журнал - Flight за 1919 г.
THE D.H. (AIRCO) 4A MACHINES USED ON THE LONDON-PARIS ROUTE: Plan, side and front elevations to scale.