34 THE DESIGN OF AN OIL ENGINE. 
would bring out the fact that the oil-engine field is still an open field in which much 
remains to be done, and that these results can be as well obtained by an organiza- 
tion which starts out to design its engine according to needs, in place of buying and 
remodeling an unsuitable design. It is felt that, if the oil engine is to be built, one 
of two courses must be followed. The first is to buy from some manufacturer a 
design which absolutely suits, and to build without modification. The second is to 
thoroughly understand the principles of the oil engine and then to design the en- 
gine to suit. It is felt that no perfect engine exists today and so it is far safer for 
the manufacturer to realize this condition and absolutely depend upon his own 
design. The point is, if the original design is to be altered at all, who shall say what 
shall be taken and what shall be rejected? Does it not seem wiser to pass upon every 
element by itself, judged by the best which is known? It has been the aim, so far 
as possible, to collect and present these known elements which are peculiar to the 
oil engine. 
THE DESIGN. 
This design was to fill the following conditions :— 
Brakerhorse-powelimoneeneine erase rela] pe eta 450 
Revolutions: ie Ah oly ceil ieises asa tse Cattolica « Ce Revere Rea ere neetae 450 
IWenethioyenall nottolexcecd jac niias rer ne earl er tanec: 14 Q° 
Width not to-exceed si) i000.) eit ape iar een neces serie e a fe 
leiahtabove| centemon sha ttmontorexcecd fare err reer ©. Oy 
Distance below center of shaft not to exceed .................. 23" 
WV SANE NOE WO GENE) on sho sodabesacdsocsogaseoov0ccGaece 26,000 Ibs. 
It is thought that all the conditions can be met or exceeded in this design. To 
meet the conditions a 6-cylinder design was fixed upon, with cylinders of 13-inch 
bore and 12-inch stroke. This gives a piston speed of 900 feet at the desired speed, 
and it is thought from data in hand that the power can be slightly exceeded. 
The weights which have been figured out from the details are about as fol- 
lows :— 
Bediiplateyiancie). tele or cnr bi -weiaree cnet 3,840 
Crank: case) ee) ee arte Benet ele Stic area tana 2,830 
Cylinders ie Seer Sees erie st Cie eens 2,200 
IBA Hb abe manus odotdad co sdomea Gems cues on™ 1,500 
Pistonse 22058) Rite eee ee ey eee Ne ney ae 960 
Witist: pins sie ce raaene Cera tv 195 
Connecting: rods seat tiara ees errs tare 1,166 
Main bearings se seb on ress cree re eae 1,310 
Stra bte ye ss) eae ee Se Otero cen at acon ete 970 
Cam) shaft bearings!) Wee se eee barr ser 528 
