TEAM COUGARCRAFT Members: Richard Flikkema Team lead Alex Gomez Assistant team lead Brett WilliamsDesigner Porfirio (PJ) MolinaDesigner 1

ADVISORS Professor: Raresh Pascali P.E. Industry Advisor: Jason Grisel P.E. Alumnus: Underclassman: John Russell (Junior) 2

OUTLINE  Team goals  History  Terminology  Vehicle description and breakdown  Cost  Work Breakdown Structure  Sponsors  Question and Answers 3

TEAM GOALS  Carry 600 lbs. in addition to the frame.  Achieve a top speed of 30 mph.  Two independent fans. Each having their own power source.  Ability to stop using an air break.  Variable ride height.  Set up a local hover competition for universities. 4

HISTORY  Hovercraft or Air Cushioned Vehicle (ACV).  Hovercraft design can date all the way back to 1716 with an invention by Emanuel Swedenborg.  1952, the current design of hover craft was created by Christopher Cockerell, an English inventor.  Used in applications such as military, transportation of people and goods, recreational use, and lifesaving applications to name a few.  ACV can cross over many different types of terrain. 5

HOVERCRAFT TERMINOLOGY  Skirting- keeps the air underneath the vehicle to ensure that the air stays under the ACV (variations in the skirting can change the hovercraft's ability to move over various surfaces).  Lift Air- The air that is pushed into the level underneath the vehicle that causes it to lift off the ground once enough force has built up.  Thrust- moves the ACV forward often created by a fan that pushes air in the back of the vehicle.  Lift- the amount of weight that a hovercraft can lift off the ground is equal to the cushion pressure multiplied by the area of the ACV.  Buoyant- when the force the pressurized air exerts on the surface equals the weight of the hovercraft.  Static Pressure- The pressure that causes the ACV to lift off the ground. 6

WHAT IS A HOVERCRAFT?  A vehicle that can ride on air and travel over various surfaces.  Requires air pressure to build up underneath to lift it off the ground.  Used in the military, local and world wide competitions. * Photos via US Navy, and decastris.com 7

VEHICLE BREAKDOWN  The ACV is broken down into:  Skirt  Frame  Lift  Propulsion  Power source  Steering * Photo via discoverhover.com 8

SKIRT  Three main types of skirts:  Bag skirt  Segmented or fingered skirt  Hybrid or bag and finger skirt  One type of bag may be used, or a combination of bags may be used to complete the skirt assembly. * Photos via 4wings.com, and gizmag.com 9

SKIRT CONTINUED  Rubber coated Kevlar or similar material.  Acts as the ACVs suspension system.  Skirt designs help to correct for uneven terrain. 10

FRAME  Has to be lightweight yet strong, and durable enough to withstand all sorts of terrain.  Snow  Sand  Marshland  Golfing * Photos via gizmag.com, dailyrepublic.com, news.bbc.co.uk, bloomberg.com 11

LIFT  The lift system can be broken down into two major sections.  Integrated- The lift system is tied into the propulsion system (i.e. ducting system)  Independent- The lift system is stand alone from propulsion (i.e. separate fan) * Photo via 12

PROPULSION 13 Different design considerations for thrust fans include: Fan configuration type Material type – composite, aluminum, plastic, etc. Tip speed vs noise level (dB) produced Sizing requirements

POWER FUEL POWERED  Economical for most applications  Ease of Maintenance/ part replacement  Noise level can be harmful over extended periods of time ELECTRIC POWERED  Tends to be more efficient than fuel combustion engines  Contributes less noise to overall system  Relatively more expensive when considering price vs output 14 *Photo via buywright.co.nz, b2c.com

STEERING  Steering consists of the rudders placed behind the propulsion fan, force air in a certain direction, and make the hovercraft turn. *Photo via discoverhover.org 15

COSTS Total ≈ $2000 Total ≈ $3700 Total ≈ $ Low End Midrange High End

WBS 17

SPONSORS 18 Thank you!

QUESTIONS? 19