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A hydroplane (or hydro, or thunderboat) is a fast motorboat, where the hull shape is such that at speed, the weight of the boat is supported by planing forces, rather than simple buoyancy. A key aspect of hydroplanes is that they use the water they are on for lift rather than buoyancy, as well as for propulsion and steering : when travelling at ...
Unlike conventional powerboats, which have a single keel, with an indent, or 'step', cut from the bottom to reduce drag, a hydroplane has a concave base with two sponsons fitted to the front and a third point at the rear of the hull. When the boat increases in speed, most of the hull lifts out of the water and runs on the three contact points.
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 result was a 502 bhp speedboat, which he used to hit a 150.19 mph top speed in October 1953 on Lake Iseo. This world speed record for an 800 kg boat still stands today. [3] A similar hydroplane was constructed by Guido Monzino in 1954. Like Arno XI, it utilizes a Lampredi engine, in this case sourced from a wrecked Ferrari 375 MM. [4]
The International Motorsports Hall of Fame and hydroplane historian Dan Cowie described Muncey as "without question, the greatest hydroplane racer in history." [1] Muncey was nicknamed "Mr. Unlimited" and won 62 races, which was the most races in the history of the sport until Dave Villwock broke his record in 2011. [1] [2] [3]
The Seafair Cup (branded as the HomeStreet Bank Cup for sponsorship reasons, and formerly the Albert Lee Appliance Cup), is an H1 Unlimited hydroplane boat race held annually in late July and early August on Lake Washington in Seattle, Washington. The race is the main attraction of the annual Seafair festival. Seattle has hosted the Seafair Cup ...
In this file photo members on a Water Follies rescue sled wrestle a tree stump from the Columbia River during the one-day Spring Testing event for race boats team preparing for the 2022 season.
Bluebird K7, in its most successful guise, on display at the Goodwood Motor Racing circuit in July 1960.. Bluebird K7 is a jet engined hydroplane in which Britain's Donald Campbell set seven world water speed records between 1955 and 1967.