Team 32 Members:Caleb McGee, M.E.Dan Rogers, M.E.Dylan Sartin, M.E.Nick Sager, M.E.Ryan Schmidt (PM), M.E.

Faculty Technical Advisor:Dr. Chu

OUTLINE:• Overview- Ryan Schmidt• Block Diagram• Subsystems:

• Frame- Dan Rogers• Drivetrain• Suspension- Nick Sager• Steering • Seating and Safety- Dylan Sartin

• Timeline• Cost- Caleb McGee• Summary

• Background• The 2013 Moonbuggy is designed to compete in the 20th annual NASA Great Moonbuggy

Race

• Human powered vehicle supporting two drivers

• Must complete a 0.7 mile obstacle-based course simulating lunar terrain features

• Deliverables• Fully Functional moonbuggy that meets NASA competition, design, and safety criteria

• Design report detailing the 2013 design, analysis, and research.

• Responsibilities• Project Management: Ryan Schmidt• Frame: Caleb McGee• Suspension: Ryan Schmidt• Steering: Nick Sager• Drive Train: Dan Rogers• Ergonomics: Dylan Sartin

• Resources• Cost of parts: $6,790.00

EXECUTIVE SUMMARY

BLOCK DIAGRAM

FRAME• Frame Rails

• 3 rail frame for greater rigidity over single rail designs• 4130 chromoly steel• ¾” O.D. 0.049” wall thickness

• Folding• Single pin hinge• Dual latches

• Layback• 10° of layback on the front frame• Directs aft forces into suspension travel

DRIVETRAIN• 4 Wheel Drive

• Front driver powers the front wheels• Rear driver powers the rear wheels

• Both drivers have Hammer-Schmidt transmissions• The Hammer-Schmidts have a system of planetary gears

contained within the sealed housing which yields either a 1:1 or a 1.6:1 overdrive gear ratio.

• 200 (ft•lb)• $730 each

DRIVETRAINTricycle style differential

• Drive gear bound together by 2 BMX freewheels ¾” spline shaft1.25” U-Joints

SUSPENSION• Independent double wishbone suspension

• Non parallel, unequal length• Pushrod activated shock absorbers

• 7 inches of travel• Optimized geometry for steering and handling stability

STEERINGUnder Seat Steering

• Space Saving• The moonbuggy must fit

into a 4’ cube or suffer a 2 minute penalty

• Adaptable• Can have a center steering

system incorporated into it• Easy to Use

Circled is the under seat steering system on a recumbent bicycle

SEATING AND SAFETY• Ergonomic Seats

• Recumbent style • Body Restraints• Roll Bars

• Extend over the passenger’s heads

TIMELINE

COST PROPOSALFrame: $500.00Drivetrain: $4,315.00Suspension: $1,250.00Steering: $375.00 Seating: $350.00

Total: $6,790.00

SUMMARY• Goal

• Build a human powered vehicle to compete at NASA’s Great Moonbuggy Race, April 25th 2013

• Vehicle Features• Four wheel drive• High travel suspension• New safety features• Light weight