Group 17 - Homelite Line Trimmer (Gasoline Powered)

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Executive Summary

Throughout the course of this project, the group members collaborated to dissect and analyze the Homelite Mightylite 26vt weedwacker. The technical report to follow contains a dissection guide, analysis, explanation, and reassembly guide to all the working parts and subsystems within the weedwacker. The Homelite Mightylite 26vt is a residential grade weedwacker, and its main use is to assist in the removal of unwanted foliage that a push lawnmower or riding lawnmower could not reach. The dissection revealed that the weedwacker is a realtively simple machine that does its job very well. Upon the product explanation, we found that the major weak point of the weedwacker is that it does not start easily. Thusly, we proposed an electric start in order to fix this problem. The electric start feature would widen the market to people that are not physically able to start a traditional weedwacker. Other than the starting mechanism, the dissection and analysis revealed that the weedwacker is already a highly refined product. The weedwacker does its job very well while maintaining a high level of simplicity. The product is so simplistic that the crank arm on the piston is the only major mechanism inside the weedwacker. Detailed information on all of these subjects can be found within the technical report below.


Homelite Line Trimmer

As a group we will be reverse engineering a Homelite Line Trimmer weedwacker. This will be done through a set of several different gates:
Gate 1: Project Planning
Gate 2: Product Dissection
Gate 3: Product Analysis
Gate 4: Product Explanation

Group Members
Ryan Edmonson
Mike Gold
Ryan Fiust-Klink
Shawn Milligan
Jeff Scott

Product Purpose:

The Homelite Weedwacker is designed to facilitate the removal of overgrowth in small, hard to reach residential areas. It is engineered to be easily operated by a single user in the upright position. It is intended to be affordable, for purchase and operation, to the average suburban or rural homeowner.

Purpose of Analysis

Analysis will involve the dissection of a gasoline powered weedwacker in order to determine the exact nature of its mechanical function. Each functional aspect will then be analyzed to assess its contribution to the proper purpose of the overall system. After, analysis suggestions will be made for possible improvements to each subsystem of the weedwacker to better fulfill its purpose. Suggestions will also be made for variations on subsystems in order to alter the product purpose.

Gate 1: Project Planning

This is the planning stage of the project. We will be assessing the project, the product, and our group. The deliverables for this gate are the Work Proposal, Management Proposal, and the Initial Assessment.
Gate 1

Gate 2: Product Dissection

With the groundwork of planning the dissection and organizing the team done, we begin dissection of the physical product. Following our plan, we are to dissect the product, documenting the steps as we go.
Gate 2

Gate 3: Product Analysis

With the product dissected, we now complete a detailed analysis of it. In this stage we will examine the product at the component and subsystem level, gathering detailed information.
Gate 3

Gate 4: Product Explanation

In this stage we must reassemble the product. We will then analyze all the information we have gathered to make detailed conclusions about the product.
Gate 4