Back in the late seventies and early eighties, the shortboard revolution was in full swing, but the ride was still a little rough around the edges. Guys were shredding on twin-fins, loving the speed and pivot, but they were also eating shit on big, hollow waves when the tail would slide out from under them. Single-fin longboards were ancient history. Shortboards were the future, but the future needed a little more control. Enter Simon Anderson, a raw-boned Aussie from Narrabeen with a vision that would forever change how we surf. He didn’t just tweak the shortboard. He created the thruster, a three-fin setup that turned wobbly high-performance into a machine that could hold a line, snap off the top, and still fly down the line like a bullet. This was the move that made the shortboard revolution truly unstoppable.
Picture the scene. The early 1980s. Surfers were already on shorter boards, under six feet, with a wide, squash tail and a pair of side fins. The twin-fin was a blast for small, mushy waves and beach breaks where you wanted to whip around like a skateboard. But when the waves got heavy—think Pipe, Sunset, or that solid winter swell at your local reef—the twin-fin had a nasty habit of losing its bite. The tail would slip mid-turn, and you’d be flying off the back, watching your board spin away like a lost soul. The single-fin, on the other hand, held solid but felt like driving a bus in slow motion. There was a glaring hole in the lineup. Surfers needed something that could turn on a dime while still gripping the face like a barnacle. That’s where Simon Anderson’s mad science came into play.
Anderson wasn’t just a shaper—he was a hell of a surfer, too. He knew the twin-fin’s weaknesses firsthand. So he started experimenting. He thought, what if I take that single-fin’s stability and blend it with the twin’s drive? The answer was a cluster of three fins: a large center fin right on the stringer, flanked by two smaller side fins angled slightly inward. The result was a board that felt like it had a mind of its own—a mind that wanted to stay glued to the wave. The center fin prevented spin-outs, while the side fins gave you that radical pivot and release. It was like having a surfboard with four-wheel drive, but only three wheels showing. The thruster was born.
Now, Anderson didn’t just slap some fins on a board and call it a day. He shaped his first thruster in 1980, a 5’8” swallowtail that looked choppy and odd to the eye. The locals gave him flak. “Three fins? You smokin’ something, Simon?” But then he took it out at Narrabeen. The thing was an absolute weapon. He could push through sections that would have bucked him off a twin, and he could pivot off the top with a crack that echoed down the beach. Word spread like a wax-tipped rumor. Within a year, the thruster went from weird experiment to the industry standard. Surfers from Hawaii to Australia, from California to South Africa, were ditching their twin-fins and ordering thrusters from their local shapers. It was a seismic shift, and it happened faster than a South Swell rising.
The beauty of the thruster was how it unlocked the full potential of the shortboard. Before the thruster, a shortboard was a wild animal—fast, but half-tamed. The thruster gave surfers the confidence to push harder, drop deeper, and carve tighter. Suddenly, you could take a five-foot board into a ten-foot wave and feel like you had a contract with the ocean. The three-fin setup allowed for more fin area in total while spreading the load, so the board didn’t drag. It was lighter, quicker, and more responsive. Pro surfers like Tom Carroll and Mark Richards started riding thrusters in competition, and the results were undeniable. Carroll won the 1983 and 1984 world titles on a thruster, and the old single and twin-fin designs were left in the dust.
But it wasn’t just about pro performance. The thruster democratized surfing. Average weekend warriors could suddenly surf better. The board felt more forgiving, more planted. You could make mistakes and recover. That extra fin gave you a safety net. It also changed the way waves were ridden. Before the thruster, surfing was about flowing down the line and doing cutbacks. After the thruster, the world of vertical surfing exploded—snaps, floaters, aerials, and aggressive bottom turns. The shortboard revolution had found its soulmate. The thruster didn’t replace the shortboard; it made the shortboard what it was meant to be.
Of course, not everyone was stoked. Some purists mourned the loss of the single-fin’s smooth, drawn-out style. They said thrusters made surfing too jerky, too mechanical. But the ocean doesn’t care about nostalgia. The thruster won because it worked. And it still works. To this day, over forty years later, the vast majority of high-performance shortboards are thrusters. Sure, we’ve seen quad fins, five fins, and bonzer setups, but the thruster remains the benchmark. Simon Anderson didn’t just change the shape of a surfboard—he changed the shape of how we ride waves.
So next time you paddle out on your shortboard, feel that grip when you bury the rail. Thank the thruster. It’s the reason you can drop into a steep face without spinning out, and the reason you can launch off the lip and land with authority. It’s the unsung hero of the shortboard revolution, the third fin that tied everything together. And it all started with an Aussie who refused to accept that sliding out was just part of the game.
