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My senior capstone is converting a an off-road buggy I bought online from gasoline to electric power. Engineering has been a passion for as long as I can remember. When I was brainstorming capstone project ideas 6 months ago, I knew I would do something related to engineering, I just hadn’t figured it out yet.

           

Eventually I decided on this project. This fused both my knowledge of engineering, and areas I wanted to improve my understanding in, like electronics and controls. When I am completed, I will have a trail-worthy cart that is more capable and versatile then the original gas-powered cart.

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Over the course of the project I will be restoring the suspension, brakes, steering column, and seating of the cart. I will also repair all the rust on the cart, and then re-finish and re-paint the steel tube-frame. The primary component of the project is fitting a completely electric drivetrain and battery system into it. This will not only make the cart more environmentally friendly, but improve its capabilities off-road with all of the benefits of electric motors. 

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The cart when purchased, with all original equipment still mounted
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Rear view of original cart
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Cart after most of the junk was torn off, and the frame was pressure washed to remove any loose dirt and mud.
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Original combustion engine still mounted inside the cart
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All of the junk removed from the cart
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Soaking components in white vinegar overnight to remove surface grime and rust
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Painted steering components ready to be
re-installed
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Repainted and degreased front suspension back on the cart
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New brake system ready to be installed on the kart
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Current state of the cart
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Some of what was removed initially from the cart. Includes fenders, wiring harness, foam, etc
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Original engine after being removed from its mounting points in the rear of the cart
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Rear view of the cart, now with no engine
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Steering column of the cart removed
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Masking tape on components to be repainted
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Restored steering column, now re-greased and repainted installed back into the cart 
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Front suspension before being put back on
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Major drivetrain components like the battery, motor controller, and motor
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New brake discs installed on the axles
New(much meatier) off-road tires from a John Deere Gator 4 by 4(old tires on the left)
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Test wiring of the motor, battery, and motor controller setup on my workbench
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Close-up of the rear axle with cleaned and repainted suspension
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Wider shot of the cart from the rear
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New motor mount installed
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Cleaning up old gear to prep for modification
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Lining up new and old gear to drill holes
(using stencil from before)
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New gear and motor attached
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Most recent photo of the cart. The new brake system is fully installed and the suspension is mostly restored. I am going to paint the front suspension arms soon.
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Removing old axle gear to adapt it to a 78 tooth gear that I purchased separately
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Marking up where holes need to be drilled for new gear to be seated
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New gear attached and re-mounted to axle
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Ground old gear teeth off 
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