Wow... I got a lot more information than I asked for. I thought flying a slightly nose heavy plane was the way to go for beginners, thats what I read and saw on youtube consistently atleast. I was just curious about a smaller lighter battery to fly a bit slower even if its only for 5ish minutes. With half throttle on a turnigy 3200mah 30c I can actually get 17-19 minutes with each cell landing with 3.8 volts. This is why I reached out, thank you for the info. So it sounds like brushless motors are like boats, you want to run at the higher rpm range. Over prop and you'll lug the engine and hurt something, under prop it and you'll break something.