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Weliworthy to Make Supercharger
Page 78
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A WOBBLE -PLATE piston type PA supercharger has been designed and developed by Ricardo and Co., Ltd., for use on commercial-vehicle engines. It is to be known as the WeIlworthyRicardo and will be produced by WeIlworthy, Ltd., Lymington, Hants.
Designed to be belt-driven from the engine crankshaft, it has 14 cylinders grouped in two banks with doubleacting pistons driven by a single nonrotating wobble-plate. The plate is mounted on ball bearings on a short Z crank or eccentric.
The drive to the piston rods is by seven pins projecting from the circumference of the wobble-plate. Long guides for the piston rods enable the pistons to run free of contact with the cylinders.
Sealing of the pistons is by labyrinth grooving. Each bank of cylinders is grouped axially around a single rotary valve which controls, in turn, both inlet and delivery to and from both ends of each cylinder.
The swept volume of the unit is 3.25 Iftres, which is suitable for dealing with engines having a swept volume of 5 litres to 9 litres.
Its working speed will vary between 11 times and twice maximum engine speed, which is relatively low. The weight will be approximately 80 lb.
It is understood that the supercharger will go into production later in the year.
"SPEND ON BUS PUBLICITY"
THE need for proper public relations its the sphere or municipal transport was stressed last week by Mr. E. R. L. Fitzpayne, general manager of Glasgow Transport Department, when he addressed Glasgow Publicity Club. Out of his undertaking's revenue of am. a year, he thought g20,000 spent on public relations would be money well used.
"On many occasions we are maliciously criticized and often the public were unaware of the reasons for certain things being done," he said.
Once a year, when the transport department came into the public eye, one party said that it was beyond criticism and the other party said the reverse. This was bad for the morale of the staff.
MR. SHORT'S BILL
THE Public Service Vehicles (Travel Concessions) Bill, for which Parliamentary time has specially been found by the Government, came up for second reading in the House of Lords on Tuesday. It was expected that the Bill would pass through its remaining stages and become law by today, when Parliament is dissolved.
The Bill, promoted by Mr. E. Short, authorizes municipalities which, last year, granted special travel concessions, to continue to do so.
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