Here are some movies and pictures to get you inspired. These are from different events with different rules, but
definitely some good ideas of what and what not to do.
Here are some pictures of a powertool dragracing event I went to a few years ago. Different event, different rules,
but just some ideas to work with.
Some of the easiest and fastest racers there were made from cheap angle grinders from harbor frieght. If you are
struggling for an idea this is a pretty cheap/easy way to go. Just add a few wheels and you are good to go.
The picture above was my entry. I used two angle grinders connected to a common drive shaft. It did pretty
well but I lost to some guys who took the event VERY seriously.