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Aviation History
1920
1920 - 0754.PDF
JULY 15, 1920 A GIANT AT OLYMPIA The Bristol Pullman triplane with four engines,an extraordinary turn of speed' "Flight" Copyright~m*j In spite of its size the Pullman has carriage than of a structure to be taken into the air. Thecabin is divided into two halves by compartments for the main petrol tanks. There is, however, a narrow passage particular feature of the design which is considerably'out ofthe ordinary. This is the four-wheeled Oleo under-carriage, necessitated by the great weight of the machine. There aretwo wheels in tandem on each side, supported on Vees whose limbs run respectively to the lower longerons of the fuselageand to the point corresponding to the attachment of the engine struts. The rear wheel takes most of the load whenon the ground and the main function of the front wheels is to prevent the machine nosing over on landing. The move-ment of the wheels is rather peculiar, being a form of link motion, as the wheels, owing to the radius rods having adownward slope, have a slight fore and aft movement in addition to the vertical travel. The arrangement of theunder-carriage will be better understood by a reference to one of our sketches. In connection with this four-engined giant, it is of interest J&&/STOL. f " Flight " CopyrightTHE BRISTOL COUPE C The body is swelled out in the vicinity of the cabin *to give more " elbow room " " Flight" Copyright The under-carriage of the Bristol Pullman between the two cabins, so that passengers can walk from one to note that on more than one occasion the machine hascabin to the other during flight. taken off on two engines only, with full load on board. There A general description of the Bristol Pullman has already is, therefore, little risk of the machine having to make a forcedbeen given, and it will therefore suffice here to refer to one landing through engine failure, a point which is greatly "Flight" CopyrightSOME BRISTOL FITTINGS : The sketches on the left and right show respectively the strut attachments on the Pullman and on the Coupe Tourer. In the centre is seen the tail skidi of the Pullman
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