Milestone 3 Preliminary Design Report Team B.Y.O.H. ENES 100 Section 0501 10/20/2010 [Type the abstract of the document here. The abstract is typically a short summary of the contents of the document. Type the abstract of the document here. The abstract is typically a short summary of the contents of the document.]
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Milestone 3
Preliminary Design Report
Team B.Y.O.H.
ENES 100 Section 050110/20/2010
[Type the abstract of the document here. The abstract is typically a short summary of the contents of the document. Type the abstract of the document here. The abstract is typically a short summary of the contents of the document.]
TABLE OF CONTENTS:
Approvals…3
Executive Summary…4
Preliminary Design Details…4
Hull Structure…4
Levitation…7
Propulsion…8
Power…9
Sensors & Actuators…9
Control Algorithm…10
Friction Obstacle…11-12
Design Drawing…13
Bill of Materials…14
Gantt Chart…15
Construction/Testing Plans…16
Anticipated Difficulties…16
2
Approvals
Zain Baqar
John Brennan
Vincent Coburn
Francis Cooper
Christopher Leung
Nicole Podesta
William Neuhauser
Shaan Shakeel
Justin Shive
Nathan Wasserman
3
Executive Summary
In this project we plan on building a hovercraft that will complete the course
while learning multiple things about both engineering as a physical activity and the
mental aspects being teamwork and leadership. We will accomplish these goals by
meeting milestone requirements on time and be flexible with our building design to
account for problems that may occur and lastly by paying attention to what we are
doing and how everything works together to create the final product. In our design
we have our base, skirt, plentum, levitation fans, propulsion fans, control system
and sensors, and lastly our batteries. Our base will be made from a styrafoam
kickboard that will be cut to form a tombstone shape. Our Skirt will be made from
ripstock nylon and will be a soft skirt with fingers attatched to the outside if
allowed. Our plentum will be made of balsa wood. We will use lithium Ion batteries
that will give power to our san ace 80 levitation fan, our gws edf 40 propulsion fans,
and our arduino. We will separate out the voltage through our mosfet transistors.
And our control system will consist of two proximity sensors for the friction part of
the course and multiple light sensors on the front and back underneath the craft so
we can calculate our angle difference from the black line. Our propulsion fans will
be constantly running and our turning will occur do to our propulsion fans being
attached to two stepper motors on the front and back.
Hull Structure
After considering the many options available, including plywood, balsa wood,
and construction foam, it was decided that a foam kickboard would be most ideally
suited for use as the base of the hovercraft (See Figure A below).
4
Figure A
(Picture taken from: http://www.amazon.com/Kickboard-Adult-Large-Made-Shipping/dp/B002FCYT1W/ref=sr_1_2?ie=UTF8&s=sporting-goods&qid=1287536148&sr=8-2 )
On the website from which the base was purchased, the manufacturer’s
stated weight is 7 ounces. The conversion was made to grams (See Equation 1
below).
Equation 1 7 ounces x 28.3495231 grams = 198.4466617
grams
1 1 ounce
The dimensions of the kickboard are 18.2” x 14” x 1.2”. The kickboard is
composed of high quality cross-linked closed cell polyethylene foam. There are
multiple reasons why this material was decided to be the most advantageous.
First, the material is durable. It is commonly used construction substance in
domestic plumbing and insulation. Second, as evidenced by the results of Equation
1, the material is very light-weight. Since budgeting weight is an essential
component of the project as a whole, this choice was able to provide the best of both
weight and strength. Third, the material came at a very cheap price of $12.99.