so was built in 73 through 74 final testing in 75
then shelved and pulled out later in 78
all very confusing but hears as much history as i could find on it
if anyone wants to know more read on lol ............................................................................ The prototype Quadrant, introduced in 1974, will never enter production. The only prototype built is now on display at the National Museum of Motorcycles Birmingham.
In 1974 Denis Poore, the person in charge of the NVT (Norton Villiers Triumph), asks the team to design a quattrocilindri to counter the various four giapponsi. Not having the financial resources to create a project from scratch,Doug Hele, with the help of Alan Barratt and Jack Shemans combines two engines tricilindrici BSA Rocket III (cylinder slightly tilted forward), remove the two side cylinders, and get it the first four-cylinder Triumph 1000cc (987cc bore x stroke 67x70, compression ratio 9.5:1). The crankshaft is constructed by adding an elbow shaft previously used for prototype trecilindri180 ° C.The camshafts, with a profile less stringent than those used on the Trident, are commissioned to Reg Hyde. The rest of the components of the engine is taken from the two-and three-cylinder engines then in production, and suitably adapted to the new use. Power is supplied by a battery of four concentric Amal carburetors 27mm and the exhaust system is derived from the Trident T160.
The new four-cylinder engine is mounted in the frame previously used to house the prototype three-cylinder engine with overhead camshaft. The rest of the bodywork is obviously taken verbatim from BSA Rocket 3 MY1972: to minimize the cost of the project fact technicians Meriden trying to use as much as possible components already in production
1975 Triumph 1000cc Four Quadrant
The prototype "Quadrant" photographed in 1974 -
In January 1975 the new bike took his first steps with the tester Neil Coombes at the MIRA circuit. In the first practice reaches205 km / h, 20km / h more than the Trident, while maintaining a maximum speed of safety equal to 7000 rev / min
The new "four" English was the logical evolution of the 750cc three-cylinder Trident and, according to initial plans of Poor, would have to fight the Japanese competition. After a warm welcome by the management NVT before the project was abandoned due to the high investment needed for the production and the decision to divert scarce resources to other priority projects.
The Quadrant would still not arrived in the market before 1977, the year in which the Japanese competition was already the second evolution of modern sport, and in this context it would be a niche bike that he could not change the history of English.
The prototype is being sold in Quadrant 1978Roy Richards the future founder of the National Motorcycle Museum in Birmingham. In 1979 Richards from the task of restoringthe Quadrant to Hugie Hancox (former coach Triumph). The prototype was in a state of disrepair, it was painted and missing logos and names on the occasion of the restoration you decide to apply the logos on the tank and side panels. The bike was restored in time for the 1983 years of the inauguration of the museum in Birmingham.
1975 Triumph 1000cc Four Quadrant
1975 Triumph 1000cc Four Quadrant
The quattrocilindri of Quadrant during the restoration fasei
With the arrival of the third millennium the Quadrant has been completely overhauled by Les Williams and Arthur Jakeman both former Triumph forming part of the working team led by Doug Hele and considered today among the most accomplished restorers of the Trident!
1975 Triumph 1000cc Four Quadrant
The Quadrant I photographed at the National Museum November 10, 2006
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