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Canadarm – A Quick Overview


The Canadarm, officially known as the Shuttle Remote Manipulator System (SRMS), is a series of robotic arms that were used on the orbiters to deploy, maneuver, and capture payloads. The development and deployment of the Canadarm marked a significant milestone in and , showcasing 's technological capabilities and its contribution to space and exploration.

Development and Origins

The Canadarm project began in the 1970s as part of Canada's contribution to NASA's Space Shuttle Program. The National Research Council of Canada, primarily through its Space Division, led the development. The primary contractor for the construction of the Canadarm was Spar Aerospace, a Canadian company, with the assistance of the ().

NASA's decision to include a robotic arm in the Space Shuttle program was driven by the need for a device that could assist in deploying and retrieving and in constructing and servicing the (). The Canadarm was designed to have multiple degrees of freedom, a large range of motion, and the ability to handle large payloads.

Technical Specifications

The Canadarm was about 15 meters (50 feet) long and consisted of six joints: two at the shoulder, one at the elbow, and three at the wrist. This design allowed it to move much like a human arm. It was capable of deploying and retrieving payloads weighing up to 332.5 kg (733 lbs) in space. When retracted, the Canadarm could be stored compactly at the side of the Space Shuttle's payload bay.

The arm was controlled by inside the shuttle using a combination of direct visual observation and closed-circuit television. The end of the arm had a “hand,” known as the End Effector, which could grapple and secure onto fixtures. This intricate mechanism allowed the Canadarm to perform delicate operations such as satellite capture and deployment, inspection, and maintenance tasks.

Key Missions and Contributions

The Canadarm made its debut on the Space Shuttle Columbia (STS-2) in November 1981. Over the next 30 years, it played a crucial role in numerous space missions, including:

  • Deployment of Satellites: The Canadarm was instrumental in deploying several important satellites, including the in 1990.
  • International Construction: The arm was a key tool in assembling the ISS, moving large modules into place.
  • Servicing Missions: It supported various servicing missions, including those to the Hubble Space Telescope, allowing for intricate repair and maintenance work.

Legacy and Evolution

The success of the Canadarm led to further advancements in space robotics. The Canadarm2, a larger and more advanced version, was developed for the International Space Station. Launched in 2001, it has played a vital role in ISS construction, maintenance, and cargo handling. The Canadarm2 has a larger reach and enhanced capabilities compared to its predecessor.

The Mobile Servicing System (MSS), which includes the Canadarm2, the Mobile Base System, and the Dextre robotic hand, represents the evolution of the pioneered by the original Canadarm. This sophisticated robotic system continues Canada's legacy in space robotics and serves as a testament to the original Canadarm's groundbreaking contributions to space exploration.


The Canadarm remains a symbol of Canada's achievements in space technology. It not only enhanced the capabilities of the Space Shuttle but also laid the groundwork for the complex robotics used on the International Space Station. Its legacy continues to inspire advancements in space exploration and technology, demonstrating the importance of international collaboration in pushing the boundaries of what is possible in space.



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