Brake Tests
År: 1913
Forlag: Pensylvania Railroad Company
Sted: Altoona, Penna.
Sider: 401
A Report Of A Series Of Road Tests Of Brakes On Passanger Equipment Cars Made At Absecon, New Jersey, In 1913
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297
(x) Machine and road tests show a difference in stopping
distance for the same type of shoe under the same braking
conditions. (Par. 549.)
(y) The effect of the difference in wheel surface conditions is
one of the leading factors which go to make up the
difference between machine and road tests. (Par. 471.)
The difference in braking performance can be established
and the factor expressing this difference be applied to
laboratory results to predict the performance of a car or
train. (Par. 549.)
RECOMMENDATIONS.
1 —In order to anticipate the air brake requirements of this year’s
passenger equipment, the present steel passenger equipment cars
now building are being equipped with the pneumatic features of
the UC equipment. Cars which will be operated ultimately
by electric power and at which time will use LE air brake equip-
ment, such as our class MP 54, for which UC equipment would
not be suitable, are being equipped with PM brakes, the equip-
ment being derived from the removal of PM equipment from
steel cars, and upon such removal these steel cars are receiving
the UC equipment. As soon as there are a sufficient number
of cars in service equipped with the pneumatic features of the
UC equipment and successfully operating, we would recommend
that all steel cars in steam service be equipped with the complete
UC equipment which would embody the addition of the electro-
pneumatic features on the cars and on the passenger locomotives.
In view of the above, we think it advisable to avoid, as far as
possible, any further increase in PM equipment and such extra
PM equipment as may be derived by removal from steam ser-
vice cars, either be used for repair stock or offered in excliange
for UC equipment.
2 .—At the time of the conversion of the UC pneumatic to the com-
plete electro-pneumatic, we would recommend the adoption of
the electric train signal and the removal of the present signal
line from the equipment, except in the case of passenger cars
which will be offered in interchange.
3 —That the by-pass valve, initially developed during these tests,
and still in an experimental stage, be perfected and introduced
on our passenger locomotives when the complete UC electro-
pneumatic equipment is applied to our cars. 1 his valve to be
an additional operating feature of the present ET passenger
equipment.