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Aviation History
1923
1923 - 0575.PDF
/•./ , t i "A SEPTEMBER 27, 1923 THE AMERICAN NAVY-WRIGHT SCHNEIDER CUP CHALLENGER TN our issue of FLKJHT for September 13 we gave an illus- tration of the Navy-Wright seaplane, one of the American entries for the Schneider Cup Seaplane Race. We have now received some particulars of this machine, which we give herewith, together with another illustration. From the latter a much better idea of the general design—strutting, etc.— may be obtained. The N.W.-2, as it is called, is a biplane, powered with a 700 h.p. Wright T type engine, and is said to be the highest The special racing propeller which will be used in the race is the culmination of long-continued experiments on model propellers in America. It is a three-bladed propeller, the blade being forged duraluminum, locked by a screw and wedge adjustment to a forged steel propeller hub. In order to give maximum clearance from the water a three-bladed propeller was decided on instead of the conventional one. The section of the propeller is such that no loss of efficiency results in the use of this smaller diameter section. It-is of interest to note oooooooo o The ill-fatedNavy-Wright, photographed atCowes shortly before the flightthat ended in a crash. The pro-peller is stated to have burst andpunctured the floats, with theconsequence that the machinecrashed when the pilot attemptedto alight.O O OOOOOOOO powered seaplane in the world. This 'plane will be piloted by Lieut. A. W. Gorton, U.S.N., and because of its airworthiness and seaworthiness will, it is believed, make an excellent record for itself in this event. On her trial trip the N.W.-2 exceeded the existing world seaplane record, averaging better than 180 miles per hour over a 2|-mile course. It has a wing spread of 28 ft., height 11 ft. 1\ ins., and length 28 ft. 4J- ins. The jving construction is cellular with ply-wood covering and wing radiator on the top aryl bottom side of the upper wing and top side of the lower wing. The oil is covered by a water -cooler, arranged so that when the engine is first started and the oil cold, the oil temperature the extreme thinness of the propeller duraluminum blades when compared with the customary thickness of a wooden propeller of sufficient strength to absorb the tremendous horse-power generated by the Wright engine. The N.W.-2 is supported with twin floats, which makes for more manoeuvrable and seaworthy characteristics than a single float with smaller ones at the end of each wing, and also aids in a fast landing on the water, regardless of whether it is rough or smooth, and amid varying wind conditions. •-> •- The vision is particularly good, being one of the most. important fighting characteristics of this 'plane. The craft is constructed with wing radiators built ia sections, O O O O O O OIO The AmericanNav y- WrigTi t Schnei'er CupChallenger: A three-quarterrear view of the machine " dry."From this view a good idea ofthe st.'«lting a r r a n g C^. T. * n tmay be obtained. Note the wing-radiators and shape of thewings. o o o o o regulator transmits heat from the cooling water through a tube to the oil, and when the oil is up to proper temperature the flow of heat reverses and the oil temperature regulators act as a cooler and cool the lubricating oil. The fuselage is of welded tubular steel throughout, and the tail surfaces are also of steel frame work. Very deep corruga- tions are used to give the maximum amount of cooling surface per square inch of wing area without detracting in any way from the speed characteristics and the lift of the wing. OOOOOOOO - ' •-' /which are easily removable. The engine is built fot heavy work, and shows a surprisingly light weight for the horse- power which it generates. It is a high compression, 700 h.p., 12-cylinder, V-type, water-cooled engine, weighing 1,150 lbs. Another American entry is the T.R.-3A, equipped with a Wright E-4 engine, rated at 200 h.p., but which has pulled as high as 290 h.p. in the dynamometer room. The T.K-3A is a single-seater biplane, built for scouting purposes, Wing radiators have been installed in both upper and lower panels. °l . ..
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