GB118123A - Improvements in or relating to Engines or Motors. - Google Patents

Abstract

118,123. Harris, H. S. Aug. 16, 1917. Propelling.-A motor producing a gaseous stream for propelling aircraft, vessels or vehicles by direct reaction or for driving a turbine, comprises a combustion chamber from which the combustion products issue in the form of a non-expanding stream into an open-ended discharging tube so that air is drawn in as the stream cools to augment the mass of the stream. Petrol, parafin, or coal dust may be used as fuel. Fig. 1 shows two petrol jets C supplied from a tank A and arranged in tubular portions H of a fan casing F. The fan E is driven by a small petrol motor D and delivers air at low pressure to combustion chambers L which are enlarged to permit expansion of the combustion products, the ends of the chambers being contracted to increase the velocity of the jets. Rearwardly tapering tubes K open at both ends surround the chambers L. Additional air may be introduced at several points along the tubes K. A series of nozzles or burners may be used in any convenient arrangement, or one or more nozzles may discharge into a single tube of large cross-section which may acommodate the pilot, tank, and engine D at its forward end. Instead of supplying air for combustion from a fan it may be supplied through a collector during forward motion. The air current may induce petrol into the burner or vice versa. For starting the engine, a fan may be provided in the tube for drawing in air and petrol and the discharging end partially closed by a valve. A tan driven by the stream in the tube K may also drive the fan E. The tube or tubes K may be angularly movable for steering purposes. The tube or tubes K may be reversed for retarding the speed of the aircraft when landing, or the rear end may be temporarily closed so that gas is discharged from the front end.