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2010 1/4 SCALE TRACTOR

DESIGN PROJECT

PROJECT PERSONNEL

Ryan Thompson (Project Lead)

Don Hopson (Frame Lead / Skilled Welder)Steven Phillips (Steering / Braking)

Colby Jones (Rules & Regulations / Rear End)

Matthew Kaufman (Drivetrain)

Georgia Gilzow (Electrical / Body)

Erik Morgan (Fundraising / Body)

Dr. Jenny ZhouAcademic Advisor

PROJECT SCOPE

Create an innovative and effective quarterCreate an innovative and effective quarter--scale tractor design thatscale tractor design that

harnesses the power and torque of a specified stock engine toharnesses the power and torque of a specified stock engine to

maximize performance.maximize performance.

Project completion is fully designed and working quarter scaleProject completion is fully designed and working quarter scale

tractor model ready to be handed over to 2010tractor model ready to be handed over to 2010--2011 senior design2011 senior design

group at the end of spring semestergroup at the end of spring semester

DESIGN REQUIREMENTS

Utilize one or more 16hp Briggs & Stratton Engine(s) along withUtilize one or more 16hp Briggs & Stratton Engine(s) along with

no more than 4 uncut Titan 26x12 Power Tiresno more than 4 uncut Titan 26x12 Power Tires

Follow 2010 ASABE International Quarter Scale Tractor StudentFollow 2010 ASABE International Quarter Scale Tractor Student

Design Rules & RegulationsDesign Rules & Regulations

Main objective is to achieve maximum pulling performance, butMain objective is to achieve maximum pulling performance, but

tractor should also excel in maneuverability, serviceability, safety,tractor should also excel in maneuverability, serviceability, safety,

ergonomics, and manufacturingergonomics, and manufacturing

16hp Briggs & StrattonEngine

26 Titan Power

Tires

DESIGN FEATURES

DESIGN IMPROVEMENTS FROM 2008 TRACTOR

Compact Frame DesignCompact Frame Design

Drivetrain Redesigned for Max Torque and Pulling PerformanceDrivetrain Redesigned for Max Torque and Pulling Performance

Transaxle Designed for PullingTransaxle Designed for Pulling

Rack & Pinion Steering for Enhanced ManeuverabilityRack & Pinion Steering for Enhanced Maneuverability

Tractor AestheticsTractor Aesthetics

DRIVETRAIN

Engine to Transaxle Power Tran smissionEngine to Transaxle Power Transmission

Provides Broadest Combination Possibilities

Easier to implement limited slip and

locking rear ends Simple gas and go operation

Centrifugal Clutch with 12 tooth sprocket onCentrifugal Clutch with 12 tooth sprocket on

crankshaft and 22 toothsprocket on input shaftcrankshaft and 22 toothsprocket on input shaft

of transaxle mechanically interfaced usingof transaxle mechanically interfaced using

chainchain

Achieves optimal maximum velocity of 10 mph for pulling

performance

Clutch engagement at 1700 rpm

KT35 Transaxle has shown proven reliability in J.D. and

Cub Cadet 6x6 Utility vehicles with integrated braking

FRAME

Compact design for enhanced maneuverability and weight requirementsCompact design for enhanced maneuverability and weight requirements

Mild steel square tubing due to low cost and Mechanica stress analysisMild steel square tubing due to low cost and Mechanica stress analysis

Flux-Core Arc Welding used in joining frame

Ultrasonic Testing results indicated

no weld defects on frame

STEERING

Rack & Pinion Steering Selected for DesignRack & Pinion Steering Selected for Design

Low cost, simple installation

Greatest turning radius compared to other steering mecha-

nisms evaluated

Same steering used on many John Deere lawn tractors

REAREND

Utilized 2008 Tractor rear shafts with hub assem-Utilized 2008 Tractor rear shafts with hub assem-bliesblies

Custom machined couplings

Bearings used for further shaft support

McLeod Machine

Works, Inc.

Frank & LauraAssunto

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