The 38-foot test boat that prepared American Magic's AC75
The AM38, nicknamed "The Mule" in reference to Team Penske's test mules (Roger Penske, one of the three team principals) of American Magic, is the reduced-scale test boat built by the New York Yacht Club / American Magic to prepare for the 36th America's Cup. The first challenger to field a surrogate yacht in full scale, the Mule was launched in November 2018, nearly two years before the team's first AC75.
Design: a McConaghy 38 converted into a foiler
The Mule started as a production McConaghy 38 hull, reworked by American Magic's design team — a group of forty people led by Marcelino Botin and Adolfo Carrau (Botin Carkeek), principal designers of the program. The AC75 Class Rule review began in March 2018, and the Mule's architecture replicates at half-scale the key structural choices of the AC75: a foiling monohull with cantilevered arms ending in T-foils on each side, plus two rudders with lifting foils.
Built in Bristol and first sailed in Newport
The boat was built in Bristol, Rhode Island, a historic composite construction site. At 11.5 m (38 feet) long, it complies with the limit imposed by the Protocol for test boats. Christened on November 9, 2018, it flew for the first time in Narragansett Bay, near Newport.
Pensacola, dry laps and 40 knots
From December 2018 to May 2019, the Mule was relocated to Pensacola Bay (Florida) — the first America's Cup team to train on the Gulf Coast since 1970 — to take advantage of sheltered waters and steady breezes. The published results of this campaign:
- top speed: 40 knots logged on the Mule;
- complete dry laps on a roughly 6-nautical-mile by 2-nautical-mile course, hull never touching the water;
- 92 days of sailing in Florida, fine-tuning of the flight controller developed in-house with Airbus as innovation partner.
Data collected from the Mule then informed the construction of the program's two AC75s, Defiant (launched May 2020) and Patriot (October 2020). American Magic contested the Prada Cup in Auckland in January–February 2021; eliminated 4–0 in the semifinals by Luna Rossa, the syndicate failed to qualify for the 36th America's Cup match.
