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
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
BRAKE TESTS.
A comprehensive series of tests of passenger equipment brakes in
which the action of the pneumatic brakes in present use
is established and new and improved pneumatic and
electro-pneumatic brakes are tried out. It is
shown that the use of this improved apparatus
will make possible very satisfactory
stops with modern heavy trains.
(Conclusions and recommendations on pages 288 to 298.)
(Index on page 398.)
CHAPTER I.
INTRODUCTION.
I. While the development of brakes for passenger equipment cars
has been in progress over a period of many years, it was not until the
introduction of heavy steel cars that difficulty was experienced, even
with improved air brakes, in making the stops, in service and emergency,
which are desirable for medium and high-speed passenger service.’
It should be possible to make such stops as short, smooth and certain,
both in application and release, as was possible with the lighter cars
of some years ago.
2. This Bulletin is a record of an extended series of tests to de-
termine the best air brake mechanism and foundation brake gear for
our heavier steel passenger equipment cars, which have now been in
service some five years and these experiments are remarkable in that
they have developed data which indicate that, by a full knowledge of
the conditions and proper attention to the component parts of the
complete apparatus, very short stops may be made with these cars in
trains which weigh close to a thousand tons.
3. There has been a continuous increase in the weight and length
of cars, length of train and speeds since the introduction of the quick
action triple valve in 1888. This has naturally resulted in taxing the
existing air brake equipment to its limit, and, therefore, it is desirable
to improve the present brake equipment on class P-70 cars in the
following particulars:
In the length of emergency stops; the uniformity of brake appli-
cations on different vehicles comprising the train; the safety and pro-
tective features demanded by service conditions of great severity and
(3)