In 40 minutes 8 atmospheres.
The Wilkinson--
In 35 minutes 2 atmospheres.
" 40 " 4 "
" 44 " 6 "
" 47 " 8 "
The Krauss machine required two hours to give 6 atmospheres, which was
the lowest pressure at which it could be worked.
The results under No. 17, viz., the fewest interruptions to the daily
service, class the motors in the following order: Krauss, electric,
Rowan, Wilkinson, compressed air. The chief cause of injury to the
compressed air motor arose from the carelessness of the drivers, who
allowed the steam boiler to be burnt out. Unfortunately, these drivers
were new to the work.
Under the letter C are classed considerations of economy in the
consumption of materials used for generating the power necessary for
working.
19. Minimum consumption of fuel (either coke or coal),
in proportion to the number of kilometers run, and
to the number of places, assuming for the seats a
width of at least sixteen inches for each person seated.
It must be borne in mind that the conditions of the competition required
that a second car should be periodically drawn by the motor, and that the
calculations which follow include the total number of miles run, the
total amount of fuel, etc., consumed, and the total number of passengers
which could be conveyed by each motor, during the total time that the
experiments were being carried on.