How Does the Tesla Roadster Use Rocket Thrusters to Fly?
The Tesla Roadster incorporates rocket thrusters adapted from SpaceX technology, enabling it to perform extraordinary aerial maneuvers. These thrusters operate using compressed air stored in carbon fiber overwrapped pressure vessels (COPVs) rather than traditional fuel combustion. When released, the high-pressure air shoots out, producing thrust that propels the car in the opposite direction, allowing for flips, jumps, and even temporary inverted driving.
The Roadster’s design packs these COPVs into every possible space, with up to 600 liters of compressed air on the highest-end Rocket variant. This includes a 200-liter tank for rear thrusters and a 400-liter tank replacing the passenger seat to empower front thrusters. The thrusters’ valves are controlled by electric motors capable of making swift, precise adjustments, ensuring stability even during complex stunts.
Despite its capability to briefly 'fly' or hang upside down, the system delivers thrust only for a very limited duration—likely just seconds—making it unsuitable for sustained airborne travel or typical driving scenarios. Instead, it offers dramatic bursts of speed and agility for stunts or potentially clearing obstacles in emergencies.
Are the Roadster's Rocket Thrusters Safe for Everyday Road Use?
The thrusters’ immense force raises significant safety concerns that currently prevent the flying Roadster from achieving road legality. For example, the four rear thrusters alone can generate more than 80 kilonewtons of force—equivalent to being struck by a nine-ton weight. Such power could cause severe injuries or damage to anyone behind or near the car, and blast debris at supersonic speeds, creating hazardous projectiles.
The Rocket version, equipped with ten thrusters and a single seat, is explicitly not approved for public roads. Even the track-focused Thrust variant is limited in release, while the Performance model, intended for 2028 production, omits thrusters altogether to meet road safety standards. Furthermore, the driver's seat may require specialized harnesses for safety during aerial maneuvers, further complicating everyday usability.
In addition to human risk, these thrusters could cause collateral damage to other vehicles or structures near the car. The propellant's supersonic gas emission and potential to accelerate debris underscore the difficulty of integrating such technology safely into typical traffic environments.
What Does This Mean for the Future of Flying Roadsters and Road Safety?
The Tesla Roadster’s flying capability offers a glimpse into radical automotive innovation but highlights substantial trade-offs between performance thrills and practical road use. The technology excels as an experimental stunt or track vehicle rather than a safe, street-legal car. For the foreseeable future, its flying features remain primarily a demonstration of cutting-edge engineering with limited real-world application given current safety regulations.
Regulatory bodies are unlikely to approve vehicles emitting rocket-like thrust around public roads due to the high risk of injury and damage. Additionally, infrastructure and driver safety systems would need massive upgrades to accommodate such high-speed aerial maneuvers safely. Enthusiasts should view the Roadster’s rocket thrusters as pioneering tech designed to push boundaries but confined to controlled conditions rather than everyday commuting.
Upcoming demonstrations may provide further insights and refinement, but mainstream adoption of flying cars with onboard thrusters faces significant hurdles in balancing innovation with public safety.