NASA’s Advanced Composite Solar Sail System (ACS3) is a revolutionary spacecraft that utilizes solar energy to propel itself through space. This world-leading solar sail spacecraft began its journey on April 24, taking off on Rocket Lab’s Electron booster from Launch Complex 1 in Mahia, New Zealand as part of the Beginning Of The Swarm mission.
The ACS3 is the size of a microwave but can open a thin plastic sail in about 25 minutes, spanning an impressive 80 square meters with a 7-meter stretchable pole. This solar sail is an important advancement, with tension poles made from extremely light polymer composite materials and a special configuration for stowage to make the system lighter and more stable.
Currently located in a sun-synchronous orbit 966 m above Earth, ACS3 will deploy within the next few weeks to demonstrate technology that can power deep space missions without using rocket fuel. The sail collects solar energy pressure to propel the spacecraft at high speeds, similar to a sailboat. The design made of flexible polymer composite materials, reinforced with carbon fiber, will be specifically tested in this project.
The tensioning poles of the solar sail act like sailboat masts, keeping the sails taut to collect solar energy. The tension poles fold compactly to overcome the challenge of fitting a large-scale sail into a rocket’s cargo compartment. Engineers use a pulling system to open the pole and hold the sail while onboard cameras record the process. The project aims to evaluate a new solar sail design and measure its thrust in low orbit, as well as test the toughness of the composite tension pole.
After the initial flight and subsystem testing period, ACS3 will spend multiple weeks testing its ability to raise and lower its orbit. If successful, NASA plans to scale up the design for interstellar travel. This innovative spacecraft represents a significant leap forward in our ability to explore beyond our planet and pave the way for future deep space missions.
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