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.

PROJECT OVERVIEWDESIGN & PROTOTYPETESTING CONCLUSION THANK YOU

PRIMARY GOAL

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


SECONDARY GOALS

Land: Speed Braking Turning radius Stability

Design GoalsWater:

Buoyancy Stability Getting on/off Turning radius


Design Norms

Trust

Transparency

Stewardship


Human-powered recreation vehicle marketCustomer: Lake house owners

Flood region serviceCustomer: Disaster relief agencies and NGO’s

Scope


THE DESIGN & PROTOTYPE


FRAMEDRIVE TRAINPROPULSIONSTEERINGFLOTATION


FRAME


FRAME – Finite Element Analysis

MODEL W/ FEA

Maximum Deflection: 0.08 in.

Direction of Force


DRIVE

TRAIN FRONT AXLE

PADDLE WHEEL AXLE


0.75 in. 0.475 in.

DRIVE TRAIN – FRONT AXLE

Minimize Axle Length: 66 in. - 62 in.


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.


Aluminum Tubing

Aluminum Tubing

Flotation

Flotation

Wheels

Wheels

Paddle Wheel Axle

Paddle Wheel Axle

FLOTATION


FLOTATIONWeight

Rider 200lbfVehicle 200lbfTotal 400lbfMargin Factor 1.5

Overall Weight 600lbf


FLOTATION

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


THE MANUFACTURING

PROCESS


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


Frame Created Jig

Fish-mouthed Tubing Aluminum MIG welded Smoothed Welds


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


Drive Train

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


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


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


Material:

Land: Stainless Steel Cable Durable Water Resistant Ease of Manufacture

Water: Polyurethane Sheet Availability Ease of Assembly Effectiveness

Steering Specifications


Steering

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


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


Propulsion

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


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


Braking and SeatingSeating:

• Weld slider brackets• Drill holes on both

sides• Weld seat sectionals• Slide material

Braking:• Extend brake cable• Attach brakes to

handles


TESTINGLAND

WATERTRANSITION


Testing on Land

Speed Braking Turning Reverse*


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


Braking Data

Trail # Speed (mph)Stop Distance (ft)

Trial 1 9.48 mph 14 ftTrail 2 12.26 mph 26 ft


Braking Test Method


Turning Test Method


Testing on Water

Buoyancy Stability Speed Transition


Buoyancy Test Method

w/ Rider w/out Rider


Buoyancy Data

Draft (Flotation Under Water)

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


Stability Test Method


Stability DataAngle Measurements

Side-to-Side

1 Rider10 degrees

2 Riders18 degrees

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


Speed Test Method


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


Transition: Land to Water


Transition: Water to Land


CONCLUSIONVehicle moves effectively on land and water

Steering on land and water exceeded expectations

Vehicle is stable on land and water

Secondary Goals


ACKNOWLEDGEMENTS

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

PROJECT OVERVIEWDESIGN & PROTOTYPETESTING CONCLUSIONTHANK YOU

THANK YOU

PROJECT OVERVIEWDESIGN & PROTOTYPETESTING CONCLUSIONTHANK YOU

amphibious vehicle

Documents

paddle wheel assembly

engineering design process

flotation resultscapacity873

flotation change

vehicle floats

axle length

paddle wheels dont

buoyancy stability