If satellites can withstand 10,000G then Spintronics can fling them into space

For more than half a century we've been sending vehicles and humans into space with the help of rockets, and more recently we’ve been sending satellites into orbit by firing rockets from the wings of commercial aircraft, but what if there was another way?

Startup SpinLaunch has been exploring such possibilities through the development of what it calls the world's first kinetic space launch system, which in their case is basically a giant centrifuge,  and it's recently completed its first test flight.

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SpinLaunch has been developing its alternative launch system since 2015, imagining a future where satellites and spacecraft can escape the Earth's atmosphere with zero emissions. It aims to achieve this with the help of a giant accelerator powered by an electric drive that it says could cut fuel use by four times and the costs by 10 times compared to traditional rocket launches, while also firing multiple payloads into orbit each day.

Initially, it is pursuing these ambitions through its Suborbital Accelerator. This consists of an upright disc-shaped, vacuum chamber slightly taller than the Statue of Liberty that uses a carbon fiber tether to whip a projectile around to speeds of up to 5,000 mph (8,047 km/h), many times the speed of sound, before releasing it like a slingshot through a launch tube and upward through the atmosphere. All of which just sounds insane.

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A larger system, the L100 Orbital Mass Accelerator, would operate on a similar principle, and is being developed to launch satellites weighing up to 440 lb (200 kg). The company says advances in electronics that enable relatively small capacitors, chips and resistors allow these components to be ruggedized to survive the 10,000 g in the fast-spinning launch chamber, and its testing has proven satellite systems are capable of enduring such conditions.

The idea of conducting orbital launches without rockets has been explored through some highly ambitious research ventures in the past, such as a joint initiative between the US and Canada called Project Harp in the 1960s that aimed to fire projectiles into orbit with a massive space gun. This design also formed the basis for Iraqi president Saddam Hussein's Project Babylon, which was abandoned when the lead engineer was assassinated.

There is a lot of work to do before non-rocket-powered space launches become a reality, but last month SpinLaunch took an important step forward. On October 22, the company completed its first test flight at its Spaceport America base in New Mexico, successfully launching a prototype vehicle from its Suborbital Accelerator which reached supersonic speeds and was recovered for reuse thereafter. It plans to conduct further test flights across 2022 with different vehicles and at different launch velocities, as it plans for its first customer launches in late 2024.

Source: SpinLaunch