I have never used a data logger. I have seen a few people try them out. The device provided information but how to use it seemed to be the issue. The few people that I know did not follow up and really put the information to good use. It seemed more like idle curiosity. You may be able to us it for your application but racing is pretty basic stuff. We can tell if we are fast enough for free.

I could see a monitoring device where in flight adjustments could be made. But just an information collector I am not so sure. There are not too many racers that bother with them.

Ed S