Final Design

Design Features Thus Far

• All Terrain Wheels

• Modified Chassis

During initial testing of the unmodified wheelchair’s performance in sand, it was found that the wheelchair would easily immobilize itself in sand deeper than 1”. The drive wheels would get stuck in sand and lose traction. Applying power to the drive wheels would worsen the situation as the wheels would free spin and digging deeper into the sand, making the wheelchair sink further and even harder to move.

The original drive tires were foam-filled. Their hard rigidity and narrow width cut through sand easily, which made them especially bad in sand. Therefore, the tires must be replaced with components could that improve traction and reduce sinkage in sand.

We decided to go with the All-terrain tires because it was able to give the wheelchair significantly more traction than before. The wider tires also provided much more floatation in the sand and prevents the chair from sinking into the sand. Here is a preview of what the wheelchair looks like with the new tires.

• Modified Chassis

With the new tires, the wheelchair has a width of 29 inches. The United States and numbers found for international standards has standard door widths of 28 inches. In order for the modified wheelchair to fit within doorways the wheels need to be “squeezed in”. Therefore, the current chassis needs to be smaller in width in order to have the bigger tires to fit under a door constraint. In order to create room for the tires, the front battery will be turned 90 degrees.

more stuff about chassis

Describe your final design here in more detail than the front page. Use your best figures and material from your presentations and report.

Include a summary of the project's performance

This page is similar to the executive summary but is in a webpage format.