Search results
Results from the WOW.Com Content Network
It is a 10-metre (33 ft) target shooting, using a standardized length 120 cm or 48 inch, and barrel caliber, dart shape, length and weight are free. In each round the shooter shoots 5 darts and there are 6 rounds per game, for a total of 30 darts. The target faces are 7 (6 cm), 5 (12 cm), 3 (18 cm) points.
Radio Electronic Token Block is a system of railway signalling used in the United Kingdom. It is a development of the physical token system for controlling traffic on single lines . The system is slightly similar to North American direct traffic control , which unlike RETB does not have a cab display unit.
Like the manual block systems outlined above, automatic systems divide the route into fixed blocks. At the end of each block, a set of signals is installed, along with a track-side sensor. When a train passes the sensor, the signals are triggered to display the "block occupied" aspect on the signals at either end of that block.
Automatic block signaling (ABS), spelled automatic block signalling or called track circuit block (TCB [1]) in the UK, is a railroad communications system that consists of a series of signals that divide a railway line into a series of sections, called blocks. The system controls the movement of trains between the blocks using automatic signals.
A Loki-Dart (foreground) on display at the White Sands Missile Range rocket garden. Loki, officially designated 76mm HEAA Rocket T220, was an American unguided anti-aircraft rocket based on the German Taifun. Like the Taifun, Loki never saw service in its original role, but later found widespread use as a sounding rocket.
The safety distance (safe-braking distance) between trains in fixed block and moving block signalling systems. In railway signalling, a moving block is a signalling block system where the blocks are defined in real time by computers as safe zones around each train. This requires both knowledge of the exact location and speed of all trains at ...
Absolute block signalling is a British signalling block system designed to ensure the safe operation of a railway by allowing only one train to occupy a defined section of track (block) at a time. [1] Each block section is manually controlled by a signalman, who communicates with the other block sections via telegraph.
The railway block signalling bell code is a system of bell sounds used in Great Britain to communicate between manually operated Signal Boxes in implementing the railway block system. (The bell system is not used in modern power signal boxes, other than to any older adjacent signalboxes.)