. Automotive industries . eback wheel center to correspond. Douglas, in a newmodel with all-chain drive, rests the horizontally op-posed twin engine on two longitudinal tubes and adjuststhe front chain by sliding the engine backward or for-ward by means of a long draw bolt. As previously inferred, the all-belt transmission isonly used on 12 per cent of British machines. Usuallyonly a single gear ratio is then provided, with a directdrive by belt from crankshaft pulley to the rear wheel;but as already mentioned Rudge and Zenith amongothers use as variable pulley to provide alteration ofgear rat
. Automotive industries . eback wheel center to correspond. Douglas, in a newmodel with all-chain drive, rests the horizontally op-posed twin engine on two longitudinal tubes and adjuststhe front chain by sliding the engine backward or for-ward by means of a long draw bolt. As previously inferred, the all-belt transmission isonly used on 12 per cent of British machines. Usuallyonly a single gear ratio is then provided, with a directdrive by belt from crankshaft pulley to the rear wheel;but as already mentioned Rudge and Zenith amongothers use as variable pulley to provide alteration ofgear ratio in conjunction with an all-belt drive. Only one British maker has adopted shaft drive, andthat on a scooter, the Unibus, which has worm gearingon the back axle. Frames The tubular frame is practically universal. Pullin,however, as already mentioned, has a pressed steelframe, but did not show at Olympia, while in the Beard-more Precision the pressed steel fuel tank forms thetop member of the frame and the steering indicating mounting of Douglas horizontalne In frame with draw belt adjustment forprimary chain June 23, 1921 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 1381 Rear sprung frames are not increasing to any pro-nounced extent, 90 per cent of machines being the rear portion is sprung, the laminated springis becoming increasingly popular, and there are addi-tional examples this year of laminated sprung fronttorks. Most of the rear sprung frame designs are dis-tinctly involved and costly to produce and probably thedesire to keep down prices has discouraged the flexiblerear suspension as more general practice. The simplest system is the Wooler, which has its frontand back axle ends mounted between pairs of coil springsand guided by slide blocks in slots in the spring cylin-ders. There is no uniformity whatever in frame design,sprung or rigid. No attempt has been made to standard-ize this part of the machine, though one accessory maker,Brampton, has recently put
Size: 1903px × 1314px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
