IRBM - meaning and definition. What is IRBM
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What (who) is IRBM - definition

BALLISTIC MISSILE WITH A RANGE OF 3,000–5,500 KM
IRBM; Intermediate Range Ballistic Missile; Intermediate range ballistic missile; Intermediate Ballistic Missile; Long-range ballistic missile; LRBM; Long-range ballistic missiles; Intermediate range; Intermediate-range ballistic missile (IRBM)

IRBM         
¦ abbreviation intermediate-range ballistic missile.

Wikipedia

Intermediate-range ballistic missile

An intermediate-range ballistic missile (IRBM) is a ballistic missile with a range of 3,000–5,500 km (1,864–3,418 miles), between a medium-range ballistic missile (MRBM) and an intercontinental ballistic missile (ICBM). Classifying ballistic missiles by range is done mostly for convenience; in principle there is very little difference between a low-performance ICBM and a high-performance IRBM, because decreasing payload mass can increase range over ICBM threshold. The range definition used here is used within the U.S. Missile Defense Agency. Some other sources include an additional category, the long-range ballistic missile (LRBM), to describe missiles with a range between IRBMs and true ICBMs. The more modern term theatre ballistic missile encompasses MRBMs and SRBMs, including any ballistic missile with a range under 3,500 km (2,175 mi).

The progenitor for the IRBM was the A4b winged rocket, based on the V-2 (officially called A4) rocket used by Nazi Germany at the end of World War II.

Examples of use of IRBM
1. Updated: Sunday, July 0', 2006 at 1212 hours IST Dhamra (Orissa), July ': India‘s most sophisticated Intermediate Range Ballistic Misslie (IRBM) Agni–III was on Sunday test–fired from a range off the Orissa coast.
2. Updated: Thursday, October 13, 2005 at 1431 hours IST New Delhi, October 13: Defence scientists will test fire next year India‘s most sophisticated ballistic missile, Agni, with a power plant made of composite materials that would considerably reduce the weight of this IRBM class missile.
3. Agni is an intermediate range ballistic missile (IRBM) with two solid fuel stages and a Post Boost Vehicle (PBV) integrated into the missile‘s Re–entry Vehicle (RV), which is made of a lightweight carbon–carbon composite material able to sustain high thermal stresses.