49cc Gas Powered 49cc Gas Powered SkateboardSkateboard

Project Team 10Project Team 10Fall 2006Fall 2006

Team Members:Team Members: Andres CaamanoAndres Caamano

Stephen Bowes Stephen Bowes Matthew ManiscalcoMatthew Maniscalco

Roger Cuentas Roger Cuentas John RomanoJohn Romano

49cc Gas Powered Skateboard49cc Gas Powered Skateboard

ObjectiveObjective Our primary objective is to model, assemble, and animate Our primary objective is to model, assemble, and animate

the intricate workings of a 49cc gas-powered motorized the intricate workings of a 49cc gas-powered motorized skateboard. skateboard.

The skateboard obtains power via a 49 cubic centimeter 2-The skateboard obtains power via a 49 cubic centimeter 2-stroke engine. This power is then transmitted to a stroke engine. This power is then transmitted to a crankshaft via a centrifugal toe-clutch, akin to those found crankshaft via a centrifugal toe-clutch, akin to those found in modern chainsaws. in modern chainsaws.

The modeling of the project primarily involves, but is not The modeling of the project primarily involves, but is not limited to, the gearbox, the motor, as well as the deck, limited to, the gearbox, the motor, as well as the deck, tires, the outer polymer casings of the engine and gearbox, tires, the outer polymer casings of the engine and gearbox, and others. and others.

ChallengesChallenges

The primary challenge our team will face will be The primary challenge our team will face will be disassembling the engine and transmission and correctly disassembling the engine and transmission and correctly measuring all the parts. measuring all the parts.

This challenge has been further complicated because we This challenge has been further complicated because we were unable to receive schematics of the device.were unable to receive schematics of the device.

Because we cannot rely on schematics, it makes our Because we cannot rely on schematics, it makes our measurements so much more important. However, many of measurements so much more important. However, many of the pieces are oddly shaped which makes their the pieces are oddly shaped which makes their measurements difficult to take.measurements difficult to take.

Also, because the engine is old and worn; a lot of the bolts Also, because the engine is old and worn; a lot of the bolts are stripped and hard to remove after several years of are stripped and hard to remove after several years of

abuseabuse..

Sub assembliesSub assemblies

EngineEngineTransmissionTransmissionBoard with Board with

wheels and wheels and axelsaxels

Engine componentsEngine components

Piston Piston Cam ShaftCam Shaft Engine BlockEngine Block FlywheelFlywheel Centrifugal Toe-Centrifugal Toe-

Clutch Clutch

Engine AssemblyEngine Assembly

Transmission ComponentsTransmission Components 01 5mm Bolt01 5mm Bolt 02 6mm Allen bolt02 6mm Allen bolt 03 6mm washer03 6mm washer 04 Black ring block04 Black ring block 05 Cracked black case05 Cracked black case 06 Plate 0106 Plate 01 07 Plate - brass07 Plate - brass 08 Plate limb08 Plate limb 09 Stress washer09 Stress washer 10 Brass wheel10 Brass wheel 11 Gear11 Gear 12 Hex bolt12 Hex bolt 13 Pinion13 Pinion 14 Shell bottom14 Shell bottom 15 Shell top15 Shell top 16 Spike gear16 Spike gear 17 Torsion bar17 Torsion bar

Transmission AssemblyTransmission Assembly

Board and ComponentsBoard and Components

Board AssemblyBoard Assembly

Final AssemblyFinal Assembly

Difficulties We Faced and Difficulties We Faced and ModificationsModifications

The chain connecting the drives, and the springs The chain connecting the drives, and the springs connecting the axles to the deck can be modeled, but due connecting the axles to the deck can be modeled, but due to the myriad chain links the animation and regeneration to the myriad chain links the animation and regeneration for such a part would take too much time.for such a part would take too much time.

Due to the inability to separate the engine block, the crank Due to the inability to separate the engine block, the crank

shaft at that location had to be estimated.shaft at that location had to be estimated. The deck of the skateboard was made of fiberglass and The deck of the skateboard was made of fiberglass and

pressed into a form, it was a shell that varied in thickness; pressed into a form, it was a shell that varied in thickness; this was exceedingly difficult to model and therefore had to this was exceedingly difficult to model and therefore had to be treated as a solid.be treated as a solid.

We were unable to model the fuel injection system due to We were unable to model the fuel injection system due to the fact that it involved many hoses and wires which at this the fact that it involved many hoses and wires which at this time we are unable to model.time we are unable to model.