RE: Is 4000mah enough?
Hello Joe,
I think that you may have placed the poll on the wrong forum. I suspect you wanted the electric pattern forum. I have been practicing the Sportman routine as well on 3700 mah packs and they seem to work well for 7 minute flights plus reserve. For me, 7 minutes of flying and having to think about what I am doing is just about right. I believe my peak current draw is in the 45-50 amp range which averages out to the low 20's for the whole flight.
Good luck,
Teo