Firth Transmission Exhibited
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THE hydrostatic transmission system I developed under Mr. Donald Firth it the National Engineering Laboraory, East Kilbride, was displayed last week as applied to a small dump truck, 'rom which the standard transmission tad been removed. During the past eight nonths work on this project has been inanced by P. R. Motors of Coventry, who are stated to be at present considerrig the commercial application of such a iydrostatic drive to the motor industry, In October 1961, we reported on the nitial developments with the Firth transnission system, and at that time the
■ Tational Engineering Laboratory was working in conjunction with Towler 3rothers (Patents) Ltd., Leeds, with a iew to fitting the equipment in a Bristol ,odekka double-deck bus. The system Ls currently developed is likely to cost nore than a conventional transmission, nit it is claimed that it will require less naintenance and give smoother "gear hanging ", whilst a further advantage is hat full engine power can be transmitted o the wheels at low wheel speeds.
Open Days
'IPEN days will be held at the Scottish
Branch of the Road Research ..aboratory at Thorntonhall. near ilasgow, on June 3 and 4. Safety spects of vehicles, skidding, automatic taming of ice on roads, and bridge lesign are among subjects to be ntured. Admission is by invitation and pplications for tickets should be made ) Mr. J. R, Lake at Thorntonhall.
NEW ESSO OIL A NEW, high quality engine oil has -I been introduced by the Esso Petro
:um Co. Ltd. It has been named Esso xtra. Motor Oil. and is a 10W/30 multirade lubricant to Supplement 1 specifi ation. The previous oils, Esso Extra 4otor Oil 20W/30 and 40/50, which are ot to Supplement 1, will be continued ut with the brand name changed to Esso (rotor Oil.
For retail sales the new oil is packed a plastics 1-pint container at 2s, 9d. er pint. When sold to industrial users, uch as vehicle operators, the barrel rice is 13s. 11d. per gal., the comparable rice for Esso Motor Oil 20W/30 and 0/50 being 12s. lid.
Also introduced by Esso are two new oar oils which will be marketed to fleet sers as Essofleet Gear Oil GP BO and ;13 90/140. These two grades replace ve previous oils and cover the requiretents of all types of gearing except such
nits as automatic gearboxes requiring ,ecial oils. The GP 90/140 is a multi rade oil and can be used in place of T 90, ST 140, GP 90 and GP 140 gear ils from Esso. The barrel price of the vo as is 9s. lid, per gal.