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JSIR Vol.65(02) [February 2006] >

Title: Design and development of indigenous cricket bowling machine
Authors: Roy, Shibendu Shekhar
Karmakar, Sankar
Mukherjee, Narayan Prasad
Nandy, Udayan
Datta, Uma
Keywords: Bowling machine
Issue Date: Feb-2006
Publisher: CSIR
IPC CodeA63D1/00
Abstract: This paper presents details of a cricket bowling machine, developed at CMERI, Durgapur, which includes a pair of adjacent ball ejecting wheels, each provided with a groove or concave surface formed in a body of an visco-elastic material. These wheels are mounted on a base for axial rotation in a common plane, the spacing between the wheels being less than the diam of a ball to be thrown and the rotational speed of each wheel being adjustable independently of the other. This machine transfers the kinetic energy to the ball by frictional gripping of the ball between two rotating wheels. The base is supported on a tilting assembly, which is mounted on a bracket in such a way that the required angular adjustment of the rotational plane of the wheel about axis parallel to direction of delivery of ball and its perpendicular axis is possible. Electronic controls are provided for controlling the speed of rotation of the wheel. These adjustments of relative rotational speeds and plane of rotation of the wheels afford wide variations in the bowling speed, spin and direction.
Page(s): 148-152
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.65(02) [February 2006]

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