team bungee

TEAM TEAM BUNGEEBUNGEE

Cameron James Cameron James

Jacob CampJacob Camp

Ronnie HarrisRonnie Harris

Jason McCantsJason McCants

EMAP 2006EMAP 2006University of AlabamaUniversity of Alabama

College of EngineeringCollege of Engineering

EMAP Team Bungee 7/19/06EMAP Team Bungee 7/19/06 22

IntroductionIntroduction

• Chemical & Biological Engineering GroupChemical & Biological Engineering Group– Labs by Chris Brazel, PhD and Sandra Wood, Labs by Chris Brazel, PhD and Sandra Wood,

MSEMSE

• Chamber Project AssignmentChamber Project Assignment– Design bungee jump attraction for Lake NicolDesign bungee jump attraction for Lake Nicol

• Bungee JumpBungee Jump– Physical & Mathematical PrinciplesPhysical & Mathematical Principles– Material & Design Considerations for Jump Material & Design Considerations for Jump

SafetySafety– Marketing ApproachMarketing Approach– Economics & FeasibilityEconomics & Feasibility


Bungee MathBungee Math – 2 Basic – 2 Basic PrinciplesPrinciples1) Cord Motion = spring = Hooke’s Law 1) Cord Motion = spring = Hooke’s Law

(1660)(1660)Cord deformation is proportional to loadCord deformation is proportional to load

Force = k x Force = k x k = spring constant ; x = lengthk = spring constant ; x = length

2) Cord Elasticity = Young’s Modulus 2) Cord Elasticity = Young’s Modulus (1807)(1807)Ability of cord to regain its original lengthAbility of cord to regain its original length

Elastic Modulus = Stress/StrainElastic Modulus = Stress/StrainStress = Load / Cross sectional AreaStress = Load / Cross sectional AreaStrain = Extension / LengthStrain = Extension / Length


Example MathematicsExample Mathematics

• Unstretched cord 20 meters long with Unstretched cord 20 meters long with an elasticity of 50% and a spring an elasticity of 50% and a spring constant of 20 Newtons/meter can hold constant of 20 Newtons/meter can hold what force?what force?

Force = (20 N/m) (10 m) = 200 NewtonsForce = (20 N/m) (10 m) = 200 Newtons

• Unstretched cord 45 meters long with Unstretched cord 45 meters long with 75% elasticity holding a 350N force has 75% elasticity holding a 350N force has what spring constant?what spring constant?

350 N/m= (k) (33.75 m) so k=10.37 N/m350 N/m= (k) (33.75 m) so k=10.37 N/m


Bungee Jump CordBungee Jump Cord - - Materials & Materials & DesignDesign

• Commercial bungee cord usedCommercial bungee cord used

• Designed to user’s standardsDesigned to user’s standards

• Elastic strand with rubber core Elastic strand with rubber core & braided fabric covering& braided fabric covering

• 0.62inch = 1.6cm diameter0.62inch = 1.6cm diameter

• Cord weighs 14 lbs / 100 ftCord weighs 14 lbs / 100 ft

• Stretch factor of 100 to 125%Stretch factor of 100 to 125%

• Supports 250-350lbs @ 100%Supports 250-350lbs @ 100%

• 500-600 jumps/cord typical500-600 jumps/cord typical


Bungee JumpBungee Jump• Typical Tower DesignTypical Tower Design

• Anchor into rock cliff or aAnchor into rock cliff or a

stand alone structure stand alone structure

• 100-150 feet high100-150 feet high

• ““Walk the Plank” concept Walk the Plank” concept jump over the waterjump over the water

• Day and night jumps Day and night jumps offeredoffered


Regulations and Regulations and GuidelinesGuidelines• North American Bungee Association (NABA)North American Bungee Association (NABA)

• Operate with a safety factor of 5Operate with a safety factor of 5– cord and related apparatus designed to carry up to 5 cord and related apparatus designed to carry up to 5

times the max allowed passenger weighttimes the max allowed passenger weight

• Certified jump masters & trained operatorsCertified jump masters & trained operators

• 4 daily inspections4 daily inspections

• Allow 5 minutes between jumps for cord to Allow 5 minutes between jumps for cord to return to original lengthreturn to original length

• Bungee cords replaced weekly Bungee cords replaced weekly (500-600 jumps)(500-600 jumps)


Safety & LiabilitySafety & LiabilityThree-way safety system:Three-way safety system:

• Full body harnessFull body harness

• Ankle strap systemAnkle strap system

• Contractor Quality Safety NetContractor Quality Safety Net

LimitationsLimitations

• Minimum Age – 18 yearsMinimum Age – 18 years

• 16yr with parent signature 16yr with parent signature

• Jumpers sign release formJumpers sign release form

• Weight range: 100-300 lbsWeight range: 100-300 lbs

• Maximum Maximum ++ 3 Gs 3 Gs


Into the “JAWS” of DeathInto the “JAWS” of Death

• Additional Thrill FactorAdditional Thrill Factor

• Jumper Jumper ”walking the ”walking the plank”plank” sees shark fins sees shark fins circling below circling below

• Safety net attached to Safety net attached to underwater shark underwater shark apparatusapparatus

• ““JAWS” shark emerges to JAWS” shark emerges to thrill jumper or spectatorsthrill jumper or spectators


MarketingMarketing

• Population of the city of Tuscaloosa Population of the city of Tuscaloosa – 80,000 without UA students80,000 without UA students– 100,000 with UA students (Aug – May)100,000 with UA students (Aug – May)– Add 50,000 for home football gamesAdd 50,000 for home football games

• University & Sports Enthusiasts 18-65 University & Sports Enthusiasts 18-65 yrsyrs

• Target audience ~65% of Tuscaloosa Target audience ~65% of Tuscaloosa and State of Alabama populationand State of Alabama population


Jump PricingJump Pricing

• $35 per jump$35 per jump

• $15 for $15 for ““I Walked the Plank”I Walked the Plank” shirtshirt

• $10 for a photo of your jump$10 for a photo of your jump

• $50 package = jump, shirt, & photo$50 package = jump, shirt, & photo

• Group rates for university & student Group rates for university & student organizations (EMAP, BamaBound, etc)organizations (EMAP, BamaBound, etc)


““The PlankThe Plank ” ”• Open-air restaurant & bar Open-air restaurant & bar

overlooking wateroverlooking water• Nautical/Pirate ThemeNautical/Pirate Theme• Comparable to Treasure Comparable to Treasure

Island in Panama City, FLIsland in Panama City, FL• Bungee jump visible from Bungee jump visible from

restaurantrestaurant• Separate mock floating ship Separate mock floating ship

serves as spectator platform serves as spectator platform or souvenir/gift shopor souvenir/gift shop

• ““Treasure Island” Miniature Treasure Island” Miniature Golf CourseGolf Course


THE PIRATE THE PIRATE “ALABAMA”“ALABAMA”

http://www.sonofthesouth.net/leeFoundation/civil-war/1862/pirate-alabama.htm


Fixed/Startup CostsFixed/Startup Costs• Cantilever Tower Cantilever Tower $95,000$95,000• Tower FoundationTower Foundation $10,000$10,000• InstallationInstallation $6,000$6,000• Tower Operating EquipmentTower Operating Equipment $9,000$9,000• Permits and Liability InsurancePermits and Liability Insurance $30,000$30,000

– Annual RenewalAnnual Renewal $1,000$1,000– Quarterly InspectionQuarterly Inspection $500 $500

(x4)(x4)• License FeeLicense Fee $5,000$5,000• Safety EquipmentSafety Equipment $2,000$2,000• Mechanical Shark ApparatusMechanical Shark Apparatus $15,000$15,000

Estimated Total = $175,000Estimated Total = $175,000


Weekly Operational Weekly Operational CostsCosts• Staff (2 shifts, 12 hours/day, 4 days/week)Staff (2 shifts, 12 hours/day, 4 days/week)

– Jump MasterJump Master $1,000$1,000– Jump Operator Jump Operator $500$500– Landing/Recovery OperatorLanding/Recovery Operator $350$350– Registration/Gift Shop ClerkRegistration/Gift Shop Clerk $350$350

• Daily Maintenance / Inspection Daily Maintenance / Inspection $350$350

• Replacement Cords (1/week)Replacement Cords (1/week) $1,000$1,000• Power Consumption Power Consumption (motors, flood lights, etc)(motors, flood lights, etc) $100$100

Estimated TotalEstimated Total= $4,000= $4,000


In Review…In Review…

• Bungee jump could be a stand-alone Bungee jump could be a stand-alone project operational in 3-4 monthsproject operational in 3-4 months

• Can be located on lake, riverfront or landCan be located on lake, riverfront or land

• Will attract the student population of Will attract the student population of Tuscaloosa, surrounding county & stateTuscaloosa, surrounding county & state

• Great marketing scheme for the cityGreat marketing scheme for the city– 1862 Rebel Pirate Ship 1862 Rebel Pirate Ship “Alabama“Alabama””– ““The Plank”The Plank” Restaurant & Bar Restaurant & Bar– ””I Walked The Plank”I Walked The Plank” Souvenirs Souvenirs– ““Treasure Island” Treasure Island” Putt-Putt GolfPutt-Putt Golf


Biomechanics virtual modeling = Biomechanics virtual modeling = http://http://

www.lifemodeler.com/LM_Manual/T_bungee.htmwww.lifemodeler.com/LM_Manual/T_bungee.htm

http://www.lifemodeler.com/LM_Manual/T_bungee.htm

http://www.lifemodeler.com/LM_Manual/T_bungee.htm

team bungee

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bungee math

cord deformation