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Show THE MODERN AUTOMOBILE j I 1 ' i ' . ') A Ogden Iiigli I School. Written especially for The Stahday4lisaminer. 1 The II r fi V I I I f 1 J I J I iPPli J i in arranging ., ogi ,.i pi i i "in Hi- . ,1 n -11 1 1 ; includes - r plant, Li f v heels, etc Thes different units are tided or 1 frame , ,f Mil CONSTRUCTION I l I n e eai 1 I V ., I I frame members together, iii later I yearn, however, we have come to consider con-sider it scientific piece of auto en- i:ini-erlng The modern frame In plan has two ald members", and from two to tw cross members These are distributed from the front to the rear, where n'de, most, and riveted to side members mem-bers and strengthened by brackets or i ta The frame is u.uite wide al the n . i and tapi r. to the front to 1 1 n -in.itc :ili-fr;ime arid Kic.s a -horter turning radius, which varies from L'a l" 26fCet. It is also raised at the rear to clear the (Inferential. This is called the kick-up. and is a i.ow unite, universally used method. Frames are div ided into two classes; those used on pleasure cars and very light commercial ars. and those used on the heavier commercial cars and trucks. Thej arc i'ery similar in construction, con-struction, those on the trucks are built for heavier duty. PR1 SSJ ii STEEL POPULAR. The materials now used are confined confin-ed to pressed or rolled steel, and wood. The latter has a thin covering of steel, ami la i'er little used. The pressed steel frame is made In lhe following shapes. Channel, Lrbaan, angle. T-franie, T-franie, tubular frame ;md many combinations combi-nations of these. Those also can be turned or USCd in different shapes by being inverted or otherwise. The frames also taper from center to rear and center to front, to redu weight as much as possible, and also to put the strength in the frame where needed- Pressed ntcel frames arc now very popular with designers though the.v cost more than the ordinary frame. This steel i- fTeat treated to obtain the maximum strength and flexibility. A g 1 flexible frame takes up the 6hocks and vibrations better 1 istx longer, long-er, and is oaslei paired than the rig-' id frame. Tile rigid flame is almost obsolete. Sub-frames have been eliminated on , nearly all cars, by the tapering of the fiont i nd of the main frame. This reduced re-duced the cpsl Of the frame to the mln- I -rum. reduced weight and vibration. ! nd was ton'idrred a step in the right. I ir,vl ion W 'l M M.I MINIM Wood frames as used on the Franklin Frank-lin cars have been proved by Franklin Frank-lin engineers, In a .scries of tests which eem to be authentic; to be more flexible, flex-ible, lighter and stronger than the steel frame. The wood used Is the best selected se-lected grade of ash. This is well seasoned, sea-soned, then cut into thin strips or sections sec-tions These different sections arc then lued together after having been placed plac-ed one on top of the other, the grain In each section running in a different "lirectlon. A thin strip of steel is then placed around It and the whole Is . r. wed or bolted together. This makes v lightweight frame and very strong names as the 'Fergus' and the ' Mar-uon Mar-uon Aluminum frame" and the heavy luly types as used on the large commercial com-mercial vehicles. (To Be Continued i oo |
