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Aviation History
1922
1922 - 0467.PDF
AUGUST 17, 1922 THE DE HAVILLAND 37 OWING to extreme pressure on our columns in last week's issue of FLIGHT, caused by the very full illustrated account of the ^Aerial Derby and Waddon Meeting, two sets of sketches illus trating constructional details of the interesting De Havilland 37 were, unfortunately, crowded out of the description of this machine. Several photographs, scale drawings and a control diagram were published, and these we supplement this week by printing below a number of sketches illustrating some of the more interesting features of the machine. It was most unfortunate that engine trouble developing just at the moment of the start should have prevented Mr. Butler from taking part in the race. He very sportingly made a start about a quarter of an hour after his official starting time, and completed one lap of the course, but, after the long delay, he would have stood no chance whatever in the handicap. It should also be pointed out that the time made by Mr. Butler in the lap which he completed does not by any means represent the actual speed of the machine. With the engine far from being up to concert pitch, and various little adjust ments still having to be made before the machine is considered thoroughly tuned up, the speed over the Derby course must have been close on 20 m.p.h. below that of which the machine will ultimately be capable. With regard to the constructional details, these will in THE D H 37 • Some constructional details. 1, General construction of an aileron. Note the laminated corner. 2 Detail of aileron, showing how spar is stiffened against torsion by horizontal U of thin three-ply. 3, The very substantial tail skid, for which large bearing area is provided. Note detachable metal shoe. 4, Elevator crank iever with its ball bearing. The horizontal rod below is incorporated in the rudder control cable. 5, is the alu- jnlnium streamline casing which covers the elevator ball bearing. 6, Details of the lower plane spar root which is carried in a fitting on the side of the fuselage. 7, Details of the adjustable pedal on the foot bar. 467
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