CH-4 Rainbow

China's export workhorse medium-altitude long-endurance combat drone — a lower-cost MALE UCAV that has seen extensive combat with Middle Eastern and African customers, delivering persistence and precision strike without the restrictions of Western systems.

Overview

The CH-4 Rainbow, known in Chinese as Caihong-4, is a piston-engine medium-altitude long-endurance unmanned combat aerial vehicle (MALE UCAV) developed by the China Aerospace Science and Technology Corporation's CALT-Rainbow division. Marketed as a cost-effective alternative to the American MQ-9 Reaper, the CH-4 has become the most combat-blooded Chinese export drone, flown by Iraq, Saudi Arabia, Egypt, Jordan, Algeria, and a growing list of African and Asian operators. Its twin-boom, pusher-propeller configuration, long-endurance reconnaissance ability, and compatibility with satellite communications make it a persistent armed overwatch platform tailored for counter-insurgency and low-intensity conflicts.

Development

CALT-Rainbow launched the CH-4 programme around 2012–2013, aiming directly at the mid-tier export market left largely unfilled by tight U.S. export restrictions on armed MQ-1 and MQ-9 variants. First flight occurred approximately in 2013, and production deliveries began the following year. The system debuted on the export market when Iraq became the first known operator, receiving its initial CH-4B units in early 2015 and flying combat missions against the Islamic State as early as that October, an event that marked the first recorded combat strike by a Chinese armed drone, according to The Diplomat. Follow-on orders from Saudi Arabia and the United Arab Emirates followed rapidly, and CASC continued to refine the platform, incorporating optional satellite communication and an expanded weapon set. A fresh export deal, reported by Asian Military Review, confirmed that demand for the Rainbow line remained buoyant into the 2020s.

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