So I started a Go Kart project w/my kids (ages 5&7) this weekend. I bought a kit that includes all the parts except the frame and engine. It included the wheels, steering linkage, rear axle, brake etc... and we're building the frame ourselves. We made some good progress this weekend, starting from scratch, we now have a roller! We're excited to say the least.
I'm kind of winging the design and frame dimensions based on photos of old karts and a few dimensioned drawing I have from other kit karts and instructions.
We've been pushing each other around the driveway and I noticed a few things right away. First, it pushes (understeers) really badly. Second, the front wheels don't quite align like they seem like they should when turning - ie: the inside wheel is turning a shorter radius, but isn't lined up to do so (ackerman angle?). I think I might need to shorten the wheelbase too to allow it to turn in a smaller radius.
The kart has a live rear axle - ie: basically a locked diff where both wheels turn at the same rate all the time. I'm wondering if some of the handling issues are due to the live axle and will be cured when we put some power to the rear wheels?
I know only enough to be dangerous about this type of geometry! But I do own a welder, grinder, saw etc.... so I can make changes if they will help down the road. Can anyone offer some help?
Thanks,
Tom
Here's some pics of the current status:
