"C J Campbell" wrote in message
...
I don't think it makes a lot of difference whether the airport is towered or
not. Why not just put a Hobbs meter in the plane?


Or look at your watch? Write down engine start time, then engine shutdown time.
That's how we did it when towing banners. Cub's don't have electrical systems
or hobbs meters, and when you're flying along at 1900 rpm's, the tach time isn't
exactly accurate either.