thumb|a suu-5003 bomblette dispenser adapted to fire four crv7 rockets. four rocket tubes are visible, while shackles for six practice bombs are located underneath. given both stores, pilots can train rocket and bomb fire on a single sortie. the crv7, short for "canadian rocket vehicle 7", is a 2.75&nbsp;inch (70&nbsp;mm) folding-fin ground attack rocket produced by bristol aerospace in winnipeg, manitoba. it was introduced in the early 1970s as an upgraded version of the standard u.s. 2.75&nbsp;inch air-to-ground rockets. it was the most powerful weapon of its class, the first with enough energy to penetrate standard warsaw pact aircraft hangars. the crv7 remains one of the most powerful air-to-ground attack rockets to this day, and has slowly become the de facto standard for western-aligned forces outside the united states. ==development== the crv7 was an offshoot of late 1950s research at carde into high-performance solid fuel rockets, performed as a part of a general program studying anti-ballistic missiles. with aerojet's assistance, carde and bristol developed the "propulsion test vehicle" to test new fuel and engine designs. this program led to the development of the black brant sounding rocket, which first flew in 1965 and has had a long and successful career since then."black brant" in the early 1970s, carde and bristol decided to use the same propellant and engine design for a new 2.75&nbsp;inch rocket to equip the cf-104 starfighter."then and now: the crv7", defence research and development canada the resulting rlu-5001/b (c-14) engine was first delivered by bristol in production form in 1973. it had a total impulse of 2,320&nbsp;lbfÂ·s (10.3&nbsp;knÂ·s) and a burn time of 2.2&nbsp;seconds. the empty weight of the rocket is 6.6&nbsp;kg and it is normally equipped with a 10&nbsp;lb (4.5&nbsp;kg) high-explosive warhead taken from u.s. rockets. thumb|left|alt=photograph of an apache helicopter firing three rockets at a target out of frame.|a british army wah-64 agustawestland 'apache' attack helicopter of the army air corps in afghanistan fires rockets at insurgents during a patrol in 2008. compared to the u.s. mk 40 mighty mouse rockets the crv7 replaced, the higher energy fuel and newer fuselage design led to a longer and much flatter trajectory, with twice the energy on impact. its maximum effective range is over 4,000&nbsp;m, allowing launch from beyond the envelope of most short-range anti-aircraft weapons. in comparison, the mighty mouse or hydra 70 requires launches from muc
Air-to-ground_rockets Weapons_of_Canada