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let heavier min by dropping big drawbars' R-R chief
Page 25
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A SUGGESTION that 15m 38-tonners might be more acceptable to the general public if larger (18m) drawbar outfits were dispensed with by the truck industry was made this week by Mr D. A. S. Plastow, group managing director of RollsRoyce Motors Ltd. He was speaking at the annual conference organized by the IMechE and SMMT in London (see report. page 30).
His suggestion was described as unrealistic by Mr W. B. Larson, of Vauxhall Motors Ltd, who said that the popularity of the drawbar combination would prevent its elimination. In his opinion it would be a more realistic move to compromise on axle loading, which if carried far enough could permit 40 tonnes.
The problem of obtaining type approval for a psv because of the two-stage build of chassis and body was described by Mr C. C. Toyne, head of vehicle inspection at the DoE. Mr B. J. Cox of British Leyland — author of a paper on psv legislation replied that this was certainly a stumbling block for industry so far as the question of final responsibility for the finished vehicle was concerned. This was the crux of the failure of the psv industry to get effective type certification going.
The relative merits of type approval versus self certification as practised in the USA were queried by Mr P. Oppenheimer, technical legislation manager of Girling Ltd. He suggested that the American system might have advantages which could be exploited in the UK.
In replying. Mr Cox emphasized that the home industry had had a form of self certification for many years but that the system definitely had its disadvantages with regard to interpretation. Mr Larson agreed and said that self certification put the burden on the manufacturer so far as interpretation was concerned, whereas with type approval by government authorities there should be no such ambiguity.