A New Heavy-service Trailer.
Page 8
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THE accompanying illustration shows a trailer which is being produced by Messrs. Bonallack and Sons, St. George Works, Cable Street, E.1, and Nursery Lane, Forest Gate, E.7. It has been specially designed to meet the demand for something more durable than the ordinary steel-framed trailer.
The body framework and floor are built entirely of English oak of very liberal section, both the body and the underworks being very strongly stayed,
a notable feature is the almost entire absence of the cheap castings which are commonly used. A very noticeable point is the spring suspension. This is usually carried out in cast slippers, but in the case of the Bonallack trailer heavy forged scroll irons are relied upon exclusively. As affording an indication of the thought bestowed upon the design of the trailer it is as well to point out that so much attention has been paid to strength and durability that the smith's shop costs
are rather greater than those of the wood shop.
Another special feature of the trailer are the wheels and axles, for massive phosphor-bronze back flanges are being used in place of the usual cast-steel hubs with floating phosphor-bronze boxes. The Imperial Spoke Co.'s Ironbark spokes are utilized for the wheels, and as this material is not only impervious to weather, but does not shrink after once fairly seasoned, a wheel is produced with a longer life than anything which has been tried for the same purpose before.
The Bonallack trailer is in use in certain directions, and that it is giving satisfaction is indicated by the experience of one large concern of hauliers, who have christened the vehicle as "the no-trouble trailer."
The trailer illustrated is one which has been built for, and is being used by, Messrs. Thomas Potter Priestley, .the old-established shipping agents and general carriers, of 7, Byward Street, Great Tower Street, London, E.C.3, who, with their experience dating back to 1760 and embracing all classes of work and vehicles, should be in a position to judge of the value and merits of the trailer.