. Automotive industries . ry airplane a course would be akin to prescribing medicine fora patient without first being assured that he was reallysick. The aim is to call attention to a disease to whichaviation engines are subject, to describe its symptoms, andto emphasize its seriousness. Methods of prevention orcure can be consigned with safety to those vitally con-cerned. •Ricardo, Automobile Engineer, February, 1921. Disk Valve Engine Used in New Car ONE of the passenger cars marketed for the first timethis year is known as the Ace, and the principalfeature of this car is the Guy
. Automotive industries . ry airplane a course would be akin to prescribing medicine fora patient without first being assured that he was reallysick. The aim is to call attention to a disease to whichaviation engines are subject, to describe its symptoms, andto emphasize its seriousness. Methods of prevention orcure can be consigned with safety to those vitally con-cerned. •Ricardo, Automobile Engineer, February, 1921. Disk Valve Engine Used in New Car ONE of the passenger cars marketed for the first timethis year is known as the Ace, and the principalfeature of this car is the Guy rotary disk valve engine. Thedisk is located in the combustion chamber. It bears againstthe cylinder head and is provided with four radial, rec-tangular slots forming ports. In the cylinder head thereare four corresponding inlet and four exhaust ports. Asthe inlet ports, for instance, are opened every time theslots in the valve disk register with the inlet ports in thecylinder heads, which happens four times during one. III ml of Ace engine, showing Guy rotary disk valve revolution of the disk, and as they need to be opened onlyonce every two revolutions of the crankshaft, the disks re-volve at only one-eighth the crankshaft speed. This lowspeed of rotation seems to be the chief novelty. The inletand exhaust ports are located adjacent to each other. Inletand exhaust ports lead to two concentric passages withoutlets on opposite sides of the cylinder head. The claims made for this valve are that it insures betterscavenging, gives a high low-speed torque, is self-cleaningand that lubrication is positive. It is said that a Guydisk valve used in an engine which was driven more than 50,000 miles showed less than in. wear on the valvesurfaces. Silent operation and freedom from warpage areother important advantages claimed.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
