F1D Vlog Episode #3 - Stopwatch with stroke count

Stopwatch recommendation.
Accusplit AX602
www.opentip.co...
Initially you just need one that can time flights.
After a while though you might find that you want to check the prop RPMs. In order to do this, you need one with a stroke counting feature. This particular one has that feature so you can keep track of RPM during various phases of your flights.