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Minerva

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12th November 1929

Page 174

Page 174, 12th November 1929 — Minerva

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ANEW model upon which Minerva NEW (England), Ltd., is concentrating is the latest HTM passenger chassis with its six-cylindered engine of 95 mm. bore and 140 mm. stroke. It is the only model on the stand. The engine is of the sleeve-valve type, for which the Minerva Co. is famous, and there is pressure-fed lubrication to the crankshaft journals, big-end bearings and gudgeon pins, the last-named receiving oil through small-diameter tubes, which are carried along the sides of the tubular connecting rods. The valve sleeves are lubricated by splash as well as by oil fed from the top, the rate of feed being governed by the degree of throttle opening. The oil is cooled by means of a radiator.

Water circulation is aided by a pump, receiving its drive from the dynamo and magneto shaft, and cooling is assisted by an eight-bladed belt-driven fan. A multi-plate dry clutch and four-speed 1186 gearbox are constructed as a unit with the engine, the drive being conveyed thence to the full-floating spiral-bevel type rear axle. Long semi-elliptic springs are used for the suspension. The four-wheel brakes are Dewandreassisted and operated by pedal, the hand lever controlling a transmission brake, which is located on the bevel pinion shaft of the rear axle.

The frame drops slightly behind the dashboard and is arched over the rear axle in order to give the requisite low floor level forpassenger work. The final-drive ratio is 5.8 to 1, this giving excellent speeds upon the road ; it is claimed that 50 m.p.h. is quite easily reached. It should be pointed out that, whilst the polished chassis exhibited has normal control, a forward-control model suitable for 36-seater passenger bodies is also available. The wheelbase of the model shown is 17 ft, 6 ins, and the track 5 ft. 10 ins. It should be stated that the Minerva range for 1930 comprises eight chassis models. In the four-cylinder group there are the MBR (15-ft. 7-in, wheelbase), the HTM (17-ft. 7-in, wheelbase), the 4-ton lorrys, chassis (14-ft. 3-in. wheelbase), and the longer four-tonner, with a wheelbase of 15 ft. 7 ins.; also two 5-6-ton models, one with 14-ft. 3-in. wheelbase and the other with 15-ft. 7-in.

wheelbase. In the six-cylinder group there are at present only two machines offered, namely, the one exhibited at Olympia and a similar chassis with a wheelbase of 16 ft. The 4-ton and 5-6ton models have single-expanding-shoe brakes on the rear wheels. The fourtonners have a final-drive ratio of 6.5 to 1, and the larger models are geared at 8 to 1, the approximate road speeds being respectively 22 m.p.h. and 18 m.p.h. As regards tyre equipment, tho MBR and HTM (four-cylinder) models have 38-in, by 7-in. pneumatics.