Hmm, I pretty sure mine has a 12 oz. tank. Have a Satio .56 and get some fairly long flight time out of it .Once the 46 is broke-in I would think you should get at the very least 12min flights. Longer than that , if you don't fly wide open all the time.
I,m guessing a 5/8 oz burn rate per min. I have a burn rate chart somewhere, just can not find it right now. Sry .What size does the instruction call for ?