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H1 Unlimited is an American unlimited hydroplane racing league that is sanctioned by the American Power Boat Association (APBA). Until 2009, the series was known as ABRA Unlimited Hydroplane, in turn renamed from APBA Unlimited Hydroplane in 2004. The H1 Unlimited season typically runs from July through September, consisting of five races.
The Rocketdyne H-1 was a 205,000 lbf (910 kN) thrust liquid-propellant rocket engine burning LOX and RP-1. The H-1 was developed for use in the S-I and S-IB first stages of the Saturn I and Saturn IB rockets, respectively, where it was used in clusters of eight engines. After the Apollo program, surplus H-1 engines were rebranded and reworked ...
The 2012 H1 Unlimited season is the fifty seventh running of the H1 Unlimited series for unlimited hydroplane, jointly sanctioned by APBA, its governing body in North America and UIM, its international body. The season began in July with the Lucas Oil Indiana Governor's Cup (Madison Regatta), held in Madison, Indiana, United States.
The 2021 H1 Unlimited season is the sixty-fifth running of the H1 Unlimited series for unlimited hydroplanes, sanctioned by the APBA. The 2020 season would have been the sixty-fifth running but that season was cancelled because of COVID-19. [1]
7:30 a.m. — H1 Unlimited testing, open testing after H1 Unlimited testing 9:15 a.m. — E-350 hydroplane Heat 5 9:40 a.m. — IBEW Local 112/National Electrical Contractors Association Vintage ...
The hull was first used as a piston-engined boat powered by a V-12 Allison aircraft engine. It was later redesigned for a Lycoming turbine engine, the same type of engine used in the Chinook helicopters. The championship winning U-1 Miss HomeStreet sponsored racing hull was built in 2007 for the H1 Unlimited hydroplane series. A new U-6 debuted ...
The cockpit camera on the U-1 Beacon Electric captured the dramatic launch and flip of the H1 Unlimited hydroplane on the Columbia River on July 27, 2024, the first day of racing at the Apollo ...
The loud roar of these engines earned hydroplanes the nickname thunderboats or dinoboats. The Ted Jones -designed Slo-Mo-Shun IV three-point, Allison-powered hydroplane set the water speed record (160.323 mph) in Lake Washington , off Seattle, Washington's Sand Point , on June 26, 1950, breaking the previous (ten-plus-year-old) record (141.740 ...