Dirtbike Swingarm
Students on Project: Justin Menendez and Nolan Ellrott
ManuFacturing
Side view: Frame on jig
Jig
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Used to constrain tubes, nodes, and mounts during welding
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L-blocks and locating plates for shock mount
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Aluminum spacer for locating axel nodes
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Alightment pins/blocks for locating tubes
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Aluminum alignment rod for locating frame nodes
Tubes and Plates
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Manufactured by students in Ware Lab
Shock Mount
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Manufactured by students in Ware Lab
Frame and Axel Nodes
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Outsourced to sponsor MDCI in Salem, VA for increased machining tolerance
Welding
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Frame will be tacked by students on jig
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Then sponsor ConnWeld in Princton, WV will complete welding
Design
Near finalized swingarm design
General Notes
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Front forks
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Stock WP forks
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8765-47 springs
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Stock KTM triple clamps
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Rear shock
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Stock WP XPLOR PDS shock
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72/75/78 N/mm progressive spring
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Materials
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4130 rectangular tube
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Bent vs Cut+Weld
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4130 plates for crossmember
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4130 threaded standoffs for rear shock mount
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6061 aluminum shock mount
Rear Axel Nodes
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Welded connection to tube structure
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Threaded hole into tube for adjustment bolt
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Axel slot for adjustment
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Pocket for adjustment blocks
Planning
Early swingarm design
General Notes
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Swingarm needs to be designed around a motor coaxial with swingarm pivot point
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Suspension needs 300mm of travel
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Factor of saftey of at least 1.3
Major Considerations
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Suspension Type
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Linkage
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PDS
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Manufacturing method
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Cast
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Welded
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Material
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Aluminum
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Steel
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Layout
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Symmetric
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Asymetric
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Mounting
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Inside frame
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Outside frame
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