A decision on where the European Space Agency’s Mach 5 Invictus testbed will be flight tested is expected within months. A remote former Cold War base on Scotland’s west coast believes its empty skies give it the edge over Spaceport Cornwall
Machrihanish on Scotland’s Kintyre peninsula is bidding to host the test program for the European Space Agency’s (ESA) €7m (US$8m) Invictus hypersonic project, with an announcement on the chosen site expected later this year.
Invictus, led by UK-based Frazer-Nash Consultancy, aims to build and fly a fully reusable, Mach 5-capable experimental aircraft to the edge of space by early 2031, demonstrating a hydrogen-fueled precooled air-breathing propulsion system and horizontal takeoff for sustained hypersonic flight. The program has shortlisted two UK sites for its test campaigns: Machrihanish and Spaceport Cornwall at Newquay.
“We want to win the competition for the Invictus program,” said Gordon Stevenson, board member at Machrihanish Airbase Community Company (MACC), which owns and operates the site. “We believe an announcement will be made this year, because Invictus has said it would like to start testing in early 2031. Leading up to that, there will be a variety of different testing programs, including engine testing, going on.”
Stevenson was careful to note that the contest may not produce a single winner: “Invictus went public with the announcement that ourselves and Cornwall Spaceport had been selected for the project. There could be elements of the testing and flight testing at each of the two locations.”
Quiet skies and closed doors
Machrihanish’s pitch rests on two factors it argues Cornwall cannot match, airspace availability and privacy. Both are critical considerations for a flight test campaign that will involve novel propulsion systems, high speeds and dual-use technology.
Beyond a twice-daily regional service to Glasgow operated by Loganair, traffic at Machrihanish is limited to fixed-wing and helicopter air ambulance flights. According to figures compiled by the company, Machrihanish recorded 1,414 aircraft movements in 2025, against more than 20,000 at Cornwall Airport Newquay, which handles scheduled regional passenger services and freight, and sits beneath busy transatlantic airways.
Hypersonic testing will involve flying unproven vehicles at extreme speeds, which will require large volumes of segregated airspace, flexible scheduling and safe abort options. Machrihanish’s east-west runway has its western threshold on the shoreline of the North Atlantic. “There’s nothing in the way, which makes it ideal for flight testing. As a safety factor it’s quite important to be able to take off over the sea and away from any kind of population,” said Stevenson.
Machrihanish’s remoteness also delivers confidentiality. The local town has a population of around 5,000, and the 1,000-acre site occupies an isolated peninsula.
Concorde flew test sorties from Machrihanish in the late 1960s, and the base has hosted several classified programs. The B-2 stealth bomber is among the aircraft tested there. “A lot of the people that come here and test their aircraft or engines want confidentiality. There can be either governmental or commercial reasons they don’t want to say a lot about what they’re doing,” said Stevenson.
Built for horizontal launch
Machrihanish’s infrastructure case centers on the runway; at 10,003ft (3,049m), it is one of the longest in the UK and, MACC believes, the longest in private hands. The Invictus spaceplane is intended to take off and land like a conventional aircraft rather than launching vertically.
“We won’t be licensed for vertical launch,” said Stevenson. “We and Cornwall are probably the only two sites in the UK that will be given horizontal launch licenses.”
The former RAF base, sold by the Ministry of Defence (MoD) to the local community in 2012 is now run as a charity and retains extensive military-era assets: hangars, large areas of concrete hard standing, an operational control tower, fire cover, passenger handling and on-site accommodation that once housed several hundred airmen.
Transport links include the airport itself, road connections to Glasgow and a deep-water harbor in the local town, a logistics advantage for hardware. “Big parts or airframes that can’t be easily transported by road can be brought in by ship. The Invictus vehicle is actually being built in Belfast, which is about 15 miles away as the crow flies,” said Stevenson.
Machrihanish as spaceport, industrial cluster and test range
Invictus is the immediate prize, but Machrihanish is also positioning itself as a licensed horizontal-launch spaceport, a test range and a growing aerospace industrial cluster.
Engine testing is already established. UK launch company Skyrora has carried out rocket engine tests at the site, and German rocket propulsion developer HyImpulse ran a test campaign at the site’s hard standings in March.
“They can set up rigs and there’s nothing around – no vehicles, no people, no buildings, no animals. They can make as much noise as they like and do no damage,” said Stevenson.
Space company Exotopic, with experience in satellites and satellite tracking, has a long-standing presence, and MACC plans to build modern accommodation, laboratories and facilities to attract aerospace SMEs, following the cluster model seen at Cornwall, Prestwick and Westcott. The company also runs an annual summer rocketry workshop for several hundred university students, held in 2026 in conjunction with ESA for the first time.
Stevenson, a former British Airways and easyJet pilot, said winning the Invictus test program would anchor MACC’s strategy and bring high-quality engineering employment to an area dependent on agriculture. “It would be transformational for the local area,” he said. “We want to create high-quality jobs to help retain young people in this area.”
