854

AMERICAN ENGINEER AND RAILROAD JOURNAL.

 

Fig. 6.--No. 11 Otto Gas Engine.

Fig. 7.—No. 8 Otto Gas Engine.

 

Fig. 8.—One of the Indicator Cards Taken in the Test.

   
    

 

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Fig. 9.—Taylor Gas Producers, with Economizers, Purifiers and Scrubbers.
R. D. WOOD 85 00., PHILADELPHIA, PA.

tributes it continuously and uniformly over the gas producing
surface.
Tests.

In a test made last June by the mechanical department of

the road the following figures were taken from one of the
large engines:

   

Cy1inder............   b e .
gevolixtiotnfstpeg-minute..  ............  % ylglginch 8

'l1l'&10I10 es ....  . . . . . . . . . . .  30min .
Gubioteetof gas tota1.............  .......  , ‘.‘t°°
Pressure of gas ....... .. .. ._ . . . . . . . . . . . . . . . . . . . . . . . .. . . .. 2% inches.
Average horsepower during tests (one cylinder) .....  52.2
Averaeehorsepowerof eng-me .   104.4
Oubio feet gas per horse-power hour  . ....  92.6

One of the indicator cards is reproduced in Fig. 8. This was

taken at 170 revolutions per minute, giving 54.5 pounds mean
effective pressure and 49.16 horse—power. The gas, when ana-
lyzed by the builders of the producers, gave the following re-
sults:

Carbonicacid.............. . . . . . . . . .  8.6
Oxygen... .....  0.4
Carbonic oxide. ........   .....  17.2
Hydrogen. .........    18.3
Marshgas . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . .  2.4
Nitrogen(bydiflEerence»...... . . . . . . . . .  ..........  53.1
Calorlflopowerpercubicfoot ....  .... 

In another analysis the gas was found to have 142.9 B. T. U.

per cubic foot., and as the engine used 92.6 cubic feet per horse— g

powers hour the engine developed one horse-power hour on