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Страна: США

Год: 1919

Fighter

Jane's All The World Aircraft 1919

A single-seater tractor biplane of quaint appearance was tested at the U.S.A. Government Experimental Field No.1 on Dec. 3rd and 7th.
   The machine is named the Christmas "Bullet" after its designer, Dr. W.W.Christmas, and is driven by a Liberty "6" engine, which develops 185 h.p. at 1,400 r.p.m. The "Bullet" was reported to have attained a speed of 175 m.p.h. at tree quarter throttle.
   The "Bullet" has what is termed one and-a-half planes, as used in the Nieuport biplanes, the upper plane having a span of 28ft, and a chord of 2 1/2 ft. External bracing and struts do not exist, the upper wing being fitted to the top of the fuselage and the lower wing to the bottom.
   The wing curve is one developed by Dr. Christmas, and is of fairly deep section between the main wing spars, but tapers off sharply aft of the rear spar, merging into a flat and thin flexible trailing edge. The wing this maintains a high angle of incidence and a fair camber at low speeds, and a lower angle and a flatter camber at higher speeds. This system of wing construction is reminiscent in a measure of the earlier Breguet and Caudron machines.
   Both upper and lower planes have the same aspect ratio. The upper plane has a maximum thickness of 5 ins. Fuller details of the wing construction cannot at the moment be given, as patents were still pending when the last was heard of the machine.
   The car-type radiator and engine are placed in the front part of the fuselage, which is very deep. The two-bladed airscrew has a projectiong bullet-shaped hub. The landing carriage struts are of deep section, such as is used in the Curtiss land machines and Burgess seaplanes. The pilot's cockpit is located behind the upper plane, affording a fairly good view in most directions.
   The elevator is not divided, as the rudder is fitted to the vertical fin in such a manner as not to interfere with free elevator movement. This method is similar to that emplayed in the Pfalz single-seater scout. The tail-skid is fixed to the stern-post.
   The principal details of the Christmas "Bullet" are as follows:
  
Span, upper plane 28 ft.
Span, lower plane 12 ft.
Chord, upper plane 5 ft.
Chord, lower plane 2 ft. 6 in.
Area, upper plane 140 sq. ft.
Area, lower plane 30 sq. ft.
Length overall 21 ft.
Weight, machine empty 1,820 lbs.
Weight, fully loaded 2,100 lbs.
Minimum speed 50-60 m.p.h.
Maximum speed 175 m.p.h.
Cruising radius 550 miles
Ceiling 14,700 ft.

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Описание:

  • Jane's All The World Aircraft 1919
  • W.Green, G.Swanborough The Complete Book of Fighters
  • Журнал Flight