SMALL FARM SMALL FARM SUBSOILERSUBSOILERfinal presentationfinal presentationUSDA SPONSERED SENIOR DESIGN PROJECTUSDA SPONSERED SENIOR DESIGN PROJECTJason Lueck, Matt Maples, John McBride, Jason Lueck, Matt Maples, John McBride, Brad Mooney, Manuel PaganBrad Mooney, Manuel PaganDESIGN REQUIREMENTSDESIGN REQUIREMENTS►►Scaled to work on a small farm.Scaled to work on a small farm.►►Low cost to purchase (under $3000 final cost)Low cost to purchase (under $3000 final cost)►►Able to penetrate at least 10Able to penetrate at least 10””(15(15””preferred)preferred)►►Modify an existing tiller (TroyModify an existing tiller (Troy--Bilt Horse)Bilt Horse)►►Surface soil left undisturbedSurface soil left undisturbedProposed IdeasProposed Ideas►►Straight ShankStraight Shank►►Rotary ChiselRotary Chisel►►TrencherTrencherProblems With Proposed IdeasProblems With Proposed Ideas►►Rotary ChiselRotary ChiselMore expensive than straight shank;More expensive than straight shank;Not feasible using the 8HP TroyNot feasible using the 8HP Troy--BiltBiltHorse Horse (may be feasible with more powerful walk(may be feasible with more powerful walk--behind tractors);behind tractors);►►TrencherTrencherVery expensive compared to other options;Very expensive compared to other options;Slow forward speed;Slow forward speed;Least reliable;Least reliable;Future Proposals for Rotary ChiselFuture Proposals for Rotary Chisel►►Hercules Series 850 TractorHercules Series 850 TractorEngine Engine ––14 HP Briggs & Stratton 14 HP Briggs & Stratton or 12 HP Kohleror 12 HP KohlerTransmission Transmission ––3 Forward Speeds 3 Forward Speeds & 3 Reverse Speeds& 3 Reverse SpeedsMax Tilling Width 30Max Tilling Width 30””Max Tilling Depth 8Max Tilling Depth 8””$2950$2950►►Hercules Series 946 TractorHercules Series 946 TractorEngine Engine ––14 HP B&S Vanguard 14 HP B&S Vanguard seriesseriesTransmission Transmission ––3 Forward Speeds 3 Forward Speeds & 3 Reverse Speeds& 3 Reverse SpeedsMax Tilling Width 34Max Tilling Width 34””Max Tilling Depth 8Max Tilling Depth 8””Approx. $4200Approx. $4200Reasons for ShankReasons for ShankSafeSafeLeast SafeLeast SafeVery SafeVery SafeSafetySafetySome Design Some Design WorkWorkMost Design Most Design WorkWorkLeast Design Least Design WorkWorkEase of Ease of DesignDesignMost Most ExpensiveExpensiveExpensiveExpensiveLeast Least ExpensiveExpensiveCostCostTrencherTrencherChiselChiselShankShankReasons for ShankReasons for ShankComparableComparableComparable Comparable Least Least EfficientEfficientEfficiencyEfficiencyLeast Least ReliableReliableReliableReliableMost reliableMost reliableReliabilityReliabilityMost Maint.Most Maint.MidMid--range range Maint.Maint.Low Maint.Low Maint.MaintenanceMaintenanceTrencherTrencherChiselChiselShank ShankTroyTroy--BiltBiltHORSEHORSETroyTroy--BiltBiltPhysical InformationPhysical Information►►Weight: 225 lbs. Weight: 225 lbs. (without PTO attachments)(without PTO attachments)►►Center of Mass Location:Center of Mass Location:Horizontal: 3.125Horizontal: 3.125””in Front of Axlein Front of AxleVertical: 7Vertical: 7””Above the AxleAbove the Axle►►Tires:Tires:Current: 15Current: 15””Diameter RubberDiameter RubberFuture: 18Future: 18””Cage WheelsCage WheelsTroyTroy--BiltBiltPhysical InformationPhysical InformationCenter of mass locationTroyTroy--BiltBiltEngine InformationEngine Information►►Engine SpecificationsEngine Specifications8 HP Briggs & Stratton 8 HP Briggs & Stratton PowerBuiltPowerBuiltMax torque: 10.9 ft.Max torque: 10.9 ft.--lbs. @ 2800 lbs. @ 2800 RPMRPM’’ssMax RPM: 3600 Max RPM: 3600 RPMRPM’’ssContinuous operation RPM: 3000 Continuous operation RPM: 3000 RPMRPM’’ssTroyTroy--BiltBiltEngine InformationEngine InformationTorque Curve1010.110.210.310.410.510.610.710.810.9111800 2000 2200 2400 2600 2800 3000 3200 3400 3600RPMTorque (ft lbs)torque curveTroyTroy--BiltBiltEngine InformationEngine InformationHP vs RPM44.555.566.577.588.51800 2000 2200 2400 2600 2800 3000 3200 3400 3600RPMHPRecommended MaxTroyTroy--BiltBiltTransmission InformationTransmission Information►►2 x (22 x (2--Speed forward + Reverse)Speed forward + Reverse)2 Belt Settings2 Belt Settings►►From Engine Shaft to Drive ShaftFrom Engine Shaft to Drive Shaft2 Gear Speeds2 Gear Speeds►►From Drive Shaft to AxleFrom Drive Shaft to Axle►►Goes Through a Worm Gear Before a Set of Helical Goes Through a Worm Gear Before a Set of Helical GearsGearsReverse Reverse --Friction Plates Attached to Belt PulleysFriction Plates Attached to Belt PulleysTroyTroy--BiltBiltTransmission InformationTransmission InformationTroyTroy--BiltBiltTransmission InformationTransmission Information120:1120:1290:1290:1Low SpeedLow SpeedBelt PositionBelt Position89:189:1216:1216:1High SpeedHigh SpeedBelt PositionBelt Position22ststGearGear11ststGearGearGear RatiosProposed Attachments to Proposed Attachments to TroyTroy--BiltBiltHORSEHORSE►►Shank With CoulterShank With Coulter►►Large Coulter DiscLarge Coulter DiscProposed Shank DesignsProposed Shank Designs►►Raked ShankRaked Shank►►Curved ShankCurved Shank►►Straight ShankStraight ShankCoulter DesignCoulter Design►►Coulter SpecsCoulter SpecsDiameter: 13.5Diameter: 13.5””Cutting Depth: 3.375Cutting Depth: 3.375””Bearings on AxleBearings on AxleAdjustable Horizontal Adjustable Horizontal PositioningPositioningToolbar DesignToolbar Design►►Toolbar SpecsToolbar SpecsLength: 15Length: 15””Material: 1.5Material: 1.5””Square Square TubingTubing►►0.250.25””wall thicknesswall thicknessAdjustable Shank AngleAdjustable Shank AngleAdjustable Shank DepthAdjustable Shank DepthDesign Problems for ShankDesign Problems for Shank►►Avoiding Adherence LossAvoiding Adherence Loss►►SolutionsSolutionsAdd Cage WheelsAdd Cage WheelsAdd Wheel WeightsAdd Wheel WeightsAdd Weight to Front of TillerAdd Weight to Front of TillerDesign SolutionsDesign Solutions►►Add Weight to Front of TillerAdd Weight to Front of TillerCage Wheels and Wheel WeightsCage Wheels and Wheel Weights►►Current Cage Wheels Current Cage Wheels Will Be ModifiedWill Be ModifiedRedesigned