UK firm Pulsar Fusion plans revolutionary nuclear fusion rockets

A U.K. start-up named Pulsar Fusion has revealed plans for a new type of nuclear fusion-powered rocket called the Sunbird. These reusable rockets aim to significantly reduce travel time across the solar system. If successful, they could cut the journey to Mars in half and enable probes to reach Pluto in just four years. The Sunbird project was kept secret for ten years and was publicly announced earlier this month. Richard Dinan, the company's CEO, stated that tests for the rocket's technology will start this year, with hopes of getting it into space by 2027. However, experts warn it may take at least a decade or longer before the technology becomes a reality. The rockets would work like giant "space tugs," helping other spacecraft escape Earth’s gravity and navigate to distant destinations. The core technology is based on Duel Direct Fusion Drive (DDFD) engines, which are designed to use a nuclear fusion process that is thought to be more feasible in space than on Earth. While this technology sounds promising, many remain skeptical. Paulo Lozano, an MIT professor, pointed out that fusion is complex and has been challenging to achieve consistently, especially in small devices. The specific designs for the Sunbird rockets are still a secret, making it difficult to assess their viability. If successful, Pulsar Fusion's rockets could be more efficient and cost-effective than current space launch methods by using minimal fuel and allowing for easier refueling in space. Each Sunbird is expected to be about 100 feet long and designed to withstand cosmic radiation. The first tests of the DDFD engine will occur in special vacuum chambers built in England. These tests will not use helium-3, the intended fuel, due to cost concerns. Instead, an inert gas will be used to simulate the engine's performance. If initial tests go well, Pulsar hopes to move towards building a full-scale prototype. However, no specific timelines are set for future developments.