. Automotive industries . -eters of shafts Nos. 6 to 10. This diameter representsa shaft which, according to one authority, is hypotheti-cally equivalent to the splined shaft in torsional Spicers tests disproved this assertion. The results of individual tests of the five specimens ofeach group were very uniform. The curves shown inFig. 2 represent the average of the five shafts in eachgroup, and are self-explanatory. Curve A is the plottedaverage of shafts Nos. 1 to 5. Curve B is curve A cor-rected for a diameter equal to the small diameter ofshafts Nos. 6 to 10. Curve C is the av
. Automotive industries . -eters of shafts Nos. 6 to 10. This diameter representsa shaft which, according to one authority, is hypotheti-cally equivalent to the splined shaft in torsional Spicers tests disproved this assertion. The results of individual tests of the five specimens ofeach group were very uniform. The curves shown inFig. 2 represent the average of the five shafts in eachgroup, and are self-explanatory. Curve A is the plottedaverage of shafts Nos. 1 to 5. Curve B is curve A cor-rected for a diameter equal to the small diameter ofshafts Nos. 6 to 10. Curve C is the average of shaftsNos. 6 to 10, and curve D is the average of shafts to 15. The position of the letters a, c, d also indicates the loca-tion of the so-called Johnson elastic limit; that is, thepoint at which the unit increment of deflection per unitof load increase is 50 per cent greater than at the be-ginning. Comparing curves B and C it will be readily seen thata splined shaft of the dimensions given has a torsional. .JbOOO 34000320O0 hi d i $/ & 24000 22000 „ 20000 J ^ 18000 3 16000 gJ14O00 12000 10000 $/ * / $* I _b £ -Q 7 A/a / & JL £J6Fj LmM UW / / 0 TOTAL LENGTH i Sf-LCIM! ;l Fig. 1—Dimensions of test i ed i« iplined shaft • O 04 Q9 ON A 12-jN RADIUS BETWEEN 9-1N Fig. 2—Curves showing results of splined shaft tests elastic limit of approximately 18 per cent less than a fullround shaft of a diameter equal to the small diameter ofthe splined shaft. The elastic limit of the hypotheticallyequivalent shaft is very much higher. A paper on a New Principle of Engine Suspension waspresented by S. E. Slocum, Professor of Applied Mechan-ics at the University of Cincinnati. The method referredto consists in mounting the engine or powerplant upona sub-frame or cradle, which is rigidly supported upon atrunnion at the middle of a cross member of the frameat one end, and resiliently supported on the main frameon both sides a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
