Development of Volleyball Spike Trainer Earlsoniel Fernandez, Patricia Denise C. Lopez, Benjie Malanum, Potazo, Mhikaela and Raymart Ian Umipig.--

Bachelor's thesis

College of Industrial Technology.-- Bachelor of Technology major in Dies and Moulds Technology Technological University of the Philippines 2023.

Includes bibliographic references and index.

This study, volleyball spike trainer for spiking training aimed to help athletes to
improve their spiking skills without a volleyball partner. It consists of four major parts,
the base, the loading system, the storage system, and the launching mechanism. The base
is used as the main support of the whole prototype with an adjustable height of 1,219.20
to 2,743.20 mm. The loading system is the main part of the prototype, it consists of
motor, pulley, belt and the circuit breaker runs the volleyball spike trainer. The storage
system is used to load the loading system with the use of ball carrier and rotates to the
volleyball feeding rail. The launching system is a feeding rail that consists of a stopper
before spiking. The prototype was tested for three trials by clipping the balls and
identified how many were successful and erroneous shots. The first trial got erroneous
results in launching balls and showed a speed of 11.50 seconds while the second and third
trials were both successful. The second trial obtained a speed of 12.97 seconds, which is
slower than the first trial. In third trial, the launching speed was 12.34 seconds. The time
interval between launching was recorded to test the speed of the transmission of the ball
from the storage until launching. The time travel interval was calculated within the range
of 11-13 seconds. The prototype was evaluated by 20 respondents who are experts in the
field of volleyball and mechanical engineering and was rated 4.56, equivalent to an
excellent descriptive rating.