Sanders
Sand is used by trams to stop wheels slipping, or to assist wheel grip in emergency braking situations. Usually sand was stored in bins under the seats in the passenger cabins close to the wheels. Generally in older vehicles the sander was operated by a small pedal in the floor. The pedal operated to open the sanders either mechanically or by air pressure. In more modern vehicles the sanders are operated electrically by pressing a button on the operator's console. Normally the sand is dropped in front of the wheels onto the track, but in some trams in Brisbane, Australia sand could also be dropped behind the wheels, in case the tram was slipping backwards on steep track. In these trams the driver depressed the sand pedal lightly to drop the sand in front of the wheels, but fully depressed the pedal to drop sand behind the tram wheels.
Read more about this topic: Tram Controls
Famous quotes containing the word sanders:
“It is certain that the only hope of retroductive reasoning ever reaching the truth is that there may be some natural tendency toward an agreement between the ideas which suggest themselves to the human mind and those which are concerned in the laws of nature.”
—Charles Sanders Peirce (1839–1914)
“Theoretically, I grant you, there is no possibility of error in necessary reasoning. But to speak thus “theoretically,” is to use language in a Pickwickian sense. In practice, and in fact, mathematics is not exempt from that liability to error that affects everything that man does.”
—Charles Sanders Peirce (1839–1914)
“Still, it will sometimes strike a scientific man that the philosophers have been less intent on finding out what the facts are, than on inquiring what belief is most in harmony with their system.”
—Charles Sanders Peirce (1839–1914)