CBU (AM)
CBU is a Canadian radio station, which airs the programming of the CBC Radio One network, in Vancouver, British Columbia. The station broadcasts on 690 AM (a clear channel frequency) and on 88.1 FM. CBU's newscasts and local shows are also heard on a chain of CBC stations around British Columbia.
CBU's studios and offices are in the CBC Regional Broadcast Centre on Hamilton Street in Downtown Vancouver. The AM transmitter is in the Steveston section of Richmond, British Columbia and the FM transmitter is on Mount Seymour. CBU (AM) transmits at 50,000 watts, the highest power authorized by the Canadian Radio-television and Telecommunications Commission (CRTC), allowing it to be heard throughout Metro Vancouver and around the British Columbia Coast. But because CKGM Montreal is the dominant class A station on 690, CBU must use a directional signal to avoid causing interference.
History
The station was launched in 1925 as CNRV "The Voice of the Pacific" on AM 1100, owned by the Canadian National Railway radio network. CNRV was acquired by the Canadian Radio Broadcasting Commission in 1933, becoming CRCV. In 1936, the CBC was created, taking over the CRBC's operations, and CRCV became CBR. The station moved to AM 1130 in 1941 (see Canadian allocations changes under NARBA), and to 690 in 1952 when the call sign was changed to its current CBU. Power was increased from 10,000 watts to its present 50,000 watts in 1967 with a transmitter site move to the Steveston shoreline.
CBU
CBU may refer to:
CBU-100 Cluster Bomb
The CBU-100 Cluster Bomb (also called the Mk-20 Rockeye II) is an American cluster bomb which is employed primarily in an anti-tank mode. It weighs 490 pounds and carries 247 Mk 118 Mod 1 bomblets.
The anti-tank cluster bomb is an air-launched, conventional free-fall weapon. The Mk 20, CBU-99, and CBU-100 are used against armored vehicles.
Design
When the Mk 20 bomb cluster is released from the aircraft, the arming wires (primary and/or optional arming) are pulled sufficiently to arm the Mk 339 fuze (and recently the FMU-140 fuze) and release the fins. The positive armed fin release arming wire frees the fin release band, and the movable fins snap open by spring-force. Functioning of the fuze initiates the linear shaped charges in the dispenser which cut the dispenser case in half and disperse the bombs/bomblets. When the Mk 339 Mod 1 primary fuse arming wire is pulled, the fuze will function 1.2 seconds after the arming wire has been extracted. If the pilot selects the option time (4.0 seconds), both the primary and option arming wires must be pulled. If the pilot selects the option time and the primary arming wire is not pulled, the fuze will fail to function and be a dud.
CBU-55
The CBU-55 was a cluster bomb Fuel Air Explosive that was developed during the Vietnam War, by the United States Army, and was used only infrequently in that conflict. Unlike most incendiaries, which contained napalm or phosphorus, the 750 pound CBU-55 was fueled primarily by propane. Described as a "the most powerful non-nuclear weapon in the U.S. arsenal," the device was one of the more powerful conventional weapons designed for warfare.
Design
The device had three main compartments, with propane, a blend of other gases, perhaps chlorine triphospate, or another oxidizing agent, and an explosive.
The CBU-55 had two variations. The CBU-55/B consisted of 3 BLU-73A/B fuel-air explosive sub-munitions in a SUU-49/B Tactical Munitions Dispenser, and the CBU-55A/B had 3 BLU-73A/B sub-munitions in a SUU-49A/B dispenser). The SUU-49/B dispenser could be carried only by helicopters or low-speed aircraft, whereas the SUU-49A/B was redesigned with a strongback and folding tailfins, so that they could also be delivered by high-speed aircraft as well.
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