Here's another stumper about fans. We had a boat race in the pool during R&D (Research and Development) class last week when the weather was hot. Several kids tried to give their boats a boost by blowing at the sails as they swam along. It might work even better to swim along with a battery powered fan pointed at the boat. So what if some young inventor mounted a powerful fan permanently on their boat blowing into the sails. Would that work best of all?
last modified .
Marc Kummel / firstname.lastname@example.org