amphibious vehicle

AMPHIBIOUS VEHICLE

The Team

The Project Overview

The Design & Prototype

The Testing

The Conclusion

The Acknowledgements

Michael GondhiSteve Brink

Steve DeMaagd

Jasper GondhiTyler

Vandongen

THE TEAM

THE GOAL

Colossians 3:17

“And whatever you do, whether in word or deed, do it all in the name of the Lord Jesus, giving thanks to God the Father

through him.”

Design and develop a working prototype of human powered amphibious vehicle (AV) by applying the principles of an engineering design process from concept to production.

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PRIMARY GOAL

Speed on Land of 15 mphSpeed on Water of 2 mphSuccessful Braking on LandSuccessful Transitions between Land and Water

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SECONDARY GOALS

Land: Speed Braking Turning radius Stability

Design GoalsWater:

Buoyancy Stability Getting on/off Turning radius

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Design Norms

Trust

Transparency

Stewardship

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Human-powered recreation vehicle marketCustomer: Lake house owners

Flood region serviceCustomer: Disaster relief agencies and NGO’s

Scope

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THE DESIGN & PROTOTYPE

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FRAMEDRIVE TRAINPROPULSIONSTEERINGFLOTATION

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FRAME

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FRAME – Finite Element Analysis

MODEL W/ FEA

Maximum Deflection: 0.08 in.

Direction of Force

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DRIVE

TRAIN FRONT AXLE

PADDLE WHEEL AXLE

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0.75 in. 0.475 in.

DRIVE TRAIN – FRONT AXLE

Minimize Axle Length: 66 in. - 62 in.

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DRIVE TRAIN – PADDLE WHEEL AXLE

Initial safety factor used for flotation = 2

Result: Vehicle floats too much and paddle wheels don’t hit water as they are placed with respect to the flotation

Change: Paddle wheel assembly lowered to match necessary height.

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Aluminum Tubing

Aluminum Tubing

Flotation

Flotation

Wheels

Wheels

Paddle Wheel Axle

Paddle Wheel Axle

FLOTATION

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FLOTATIONWeight

Rider 200lbfVehicle 200lbfTotal 400lbfMargin Factor 1.5

Overall Weight 600lbf

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FLOTATION

ResultsCapacity 873.36lbfPlane Load 124.77lbf/inOverall Weight 600.00lbfDraft 4.81inFreeboard 2.19in

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THE MANUFACTURING

PROCESS

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Material: Aluminum 6061

High strength to weight ratio

Shape: Circular Tubing Ease of welding

Diameter: 3 inch Size donated from Steelcase

Thickness: 1/8 inch Ease of welding Strength

Frame Specifications

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Frame Created Jig

Fish-mouthed Tubing Aluminum MIG welded Smoothed Welds

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Material: 4130 Cold Rolled Steel

According to Calculations

Diameter: 7/8 inch Available from Machine Shop

Length: 62 inches According to Frame Width

Drive Train Specifications

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Drive Train

Drilled Ends: .322 DiameterTapped Ends: 3/8-26 TapManufactured Bearing AdaptersManufactured Gear Hub AdaptersPurchased Bearings w/ Set ScrewsWeld Gear Hub onto Axle

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Material: Closed Cell Polystyrene

High Buoyancy Low Cost Availability

Coating: Epoxy, Resin (Hardener), Fiberglass Cloth

High Strength Ease of Manufacture

Dimensions: 7 in. x 18 in. x 96 in. According to Buoyancy Calculations

Flotation Specifications

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FlotationCNC Hotwired FoamSquare Jig for RouterRouted Square HoleConnected Bolts into WoodFiber-glassed

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Material:

Land: Stainless Steel Cable Durable Water Resistant Ease of Manufacture

Water: Polyurethane Sheet Availability Ease of Assembly Effectiveness

Steering Specifications

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Steering

Cut Aluminum Block to Raw 3 in. Cube Programmed Bridgeport Mill• Milled “U-Shape contour”• Milled “Grooves” additional grip• Milled and Tapped Holes

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Material:

4130 Steel Axle and Sleeves For High Strength and Welding Purposes

Plastic Paddles and Housings Availability, Effectiveness, and Water

ResistantDimensions:

Axle: ¾ in. diameter To Fit Paddle Wheels

Paddle: 19 in. diameter Common Paddle Size

Propulsion Specifications

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Propulsion

Machined four sleeves Welded Gear Hub to Inner Sleeve Screwed in Paddle Wheels Spaced Housings Attached Paddle Wheel Assembly to Frame

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Seating: 3 Aluminum “L- slider brackets” on each side

Adjustable seat for all riders

1 inch square tubing Available in Engineering Shop

Braking: Used “center-pull” bicycle brakes

Simplicity Proven Design

Braking and Seating Specifications

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Braking and SeatingSeating:

• Weld slider brackets• Drill holes on both

sides• Weld seat sectionals• Slide material

Braking:• Extend brake cable• Attach brakes to

handles

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TESTINGLAND

WATERTRANSITION

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Testing on Land

Speed Braking Turning Reverse*

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Speed DataTrial # Speed (mph)Trial 1 11.76 mphTrial 2 12.40 mphTrial 3 14.04 mph

Average Speed 12.73 mph

Top Speed 14.04 mphPROJECT OVERVIEWDESIGN & PROTOTYPETESTING CONCLUSION THANK YOU

Speed Test Method

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Braking Data

Trail # Speed (mph)Stop Distance (ft)

Trial 1 9.48 mph 14 ftTrail 2 12.26 mph 26 ft

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Braking Test Method

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Turning Test Method

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Testing on Water

Buoyancy Stability Speed Transition

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Buoyancy Test Method

w/ Rider w/out Rider

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Buoyancy Data

Draft (Flotation Under Water)

No Rider 1.4in.w/ 1 Rider (150 lbs) 3in.w/ 2 Riders (325 lbs) 4.5in.

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Stability Test Method

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Stability DataAngle Measurements

Side-to-Side

1 Rider10 degrees

2 Riders18 degrees

Front-to-Back1 Rider-Back 5 degrees1 Rider-Front 8 degrees

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Speed Test Method

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Trial # Speed (mph)Trial 1 2.06 mphTrial 2 2.06 mphTrial 3 2.26 mph

Average Speed 2.13 mph

Top Speed 2.26 mph

Speed Data

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Transition: Land to Water

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Transition: Water to Land

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CONCLUSIONVehicle moves effectively on land and water

Steering on land and water exceeded expectations

Vehicle is stable on land and water

Secondary Goals

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ACKNOWLEDGEMENTS

Professor Nielsen – Team AdvisorProfessor ErmerPhil Jasperse – Metal ShopRen Tubergen – Industrial ConsultantCEAC Review Board

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THANK YOU

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