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Handley Page 0-400
Bomber
Britain
1917
Manufacturer: Handley Page
$6.99
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$10.98 (aircraft + modifications)
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Specifications

Engines 2 х inline 12 cyl. Eagle VIII
Power (h.p.): 360
Height (mm): 6700
Length (mm): 18930
Wing span (mm): 30480
Wing surface (sq.m.): 153.1
Empty weight (kg): 3774
Crew (kg): 320
Takeoff without bombload (kg): 5265
Takeoff with 16x112 lb bombs (kg): 6078
Fuel capacity (l): 1291
Oil capacity (l): 136
Climb rate, full fuel load, without bombload
1000 m — 7 min. 42 sec.
2000 m — 18 min. 54 sec.
3000 m — 43 min. 14 sec.
Climb speed, full fuel load, 16x122 lb bombload
1000 m— 13 min. 51 sec.
2000 m— 47 min. 54 sec.
Speed, full fuel load, w/o bombload(IAS: km/h)
sea level — 156.3
1000 m — 146.3
2000 m — 135.2
3000 m — 121.3
Endurance (h.,min.) at 1000m
with bombs — 8 h.
w/o bombs — 9 h. 26 min.
Armament x2522 7,69mm rounds in total
Nose position 2 х Lewis 7.69mm, 12 drums with 97 rounds each
Tail upper position 2 х Lewis 7.69mm, 7 drums with 97 rounds each
Belly position: 1 х Lewis 7.69mm, 7 drums with 97 rounds each
Bomb load variations
16 x 112lb (813kg)
8 x 112lb (406kg)
8 x 250lb (908kg)
4 x 250lb (454kg)
1 x 1650lb (749kg)
Description

The O/400 was the next step in improving upon the HP O/100 design. Two fuel tanks were moved from the engine nacelles into the fuselage, and a medium-size fuel tank was mounted above these two tanks in the upper section of the fuselage. Hollow spars were mounted in the wings; the undercarriage was fitted with towing lugs; and radiator shutters were now fitted at the factory. The engines were now covered with armour plating. The differential thrust of the two engines was compensated by the central tail fin. The fitting of the new Eagle VIII engines made it possible to increase the maximum bomb load. Besides Handley Page, this bomber was also manufactured by the Royal Aircraft Factory, Boulton and Paul, Metropolitan Carriage Wagon, and Birmingham Carriage Co. By the end of the war, 554 planes had been built in England.

The first mention of this plane in frontline use is dated September 1917. These planes were used to bomb railway stations, supply depots, factories and ports at night. Pilots mentioned that the plane handled nicely and was easy to handle on takeoff; however, they noted that the controls were a little stiff and felt slightly delayed.Planes of this type participated in combat on the Western and Palestinian fronts.

References:
1) Trial Report M219, July 1918.
2) Handley Page O/400, CA Owers, vol. 1 and 2.
3) Handley Page O/400 Specification.
4) Aviation Enthusiast Magazine. Viewed from the Cockpit, page 81.