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Technical Paper

Design and Development of the BUB 7 Land Speed Record Motorcycle

2008-12-02
2008-01-2983
In 1994 the author presented a paper (942532) at the Motor Sports Engineering Conference that described the design of a custom-built engine intended for a land speed record motorcycle. At that point the engine had not yet run and no performance data was available. Since then the engine has been completed and on September 5, 2006 it powered the BUB 7 streamliner ridden by Chris Carr to a new world record of 350.884 mph. In the first part of this paper performance details for the engine are provided along with a brief update of engine development. The second part of the paper describes the design and development of the motorcycle. A combination of wind tunnel and coast down testing has demonstrated a remarkably low coefficient of drag of .09. The design and construction of the carbon fiber monocoque chassis is discussed along with finite element analysis results and experimental measurements of torsional stiffness.
Technical Paper

Development of a Universal Spring Mechanism for Automotive Suspension System Design

2004-03-08
2004-01-1553
Today's suspension coil spring design requires not only accounting for one-dimensional force along the coil spring axis, but also exerting a complex multi-dimensional force and torque field between the spring seats [1,2,3,4,5]. This paper describes the design of a 6-DOF parallel mechanism to mimic the force and torque characteristics of a coil spring. This mechanism can physically generate the 6-DOF force and torque field of a coil spring, allowing designers to experimentally evaluate the quasi-static force effects of a coil spring while still at the design stage. Examples are presented for a physically generated force and torque field of a coil spring used in a McPherson Strut suspension, and its effect is correlated to the side force acting upon the suspension strut. As an extension, this mechanism can be widely used to investigate the relationship between spring characteristics and damper friction.
Book

Design of Racing and High Performance Engines

1995-02-01
This book presents, in a clear and easy-to-understand manner, the basic principles involved in the design of high performance engines. Editor Joseph Harralson first compiled this collection of papers for an internal combustion engine design course he teaches at the California State University of Sacramento. Topics covered include: engine friction and output; design of high performance cylinder heads; multi-cylinder motorcycle racing engines; valve timing and how it effects performance; computer modeling of valve spring and valve train dynamics; correlation between valve size and engine operating speed; how flow bench testing is used to improve engine performance; and lean combustion. In addition, two papers of historical interest are included, detailing the design and development of the Ford D.O.H.C. competition engine and the coventry climax racing engine.
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