Originally Posted by Wrongway-Feldman
So after much reading and headscratching I have but one question.
If one is happy with the performance of ones aircraft but wishes for longer flight times per charge, how does one go about it?
Is it as simple as increasing the Mah?
For instance if performance is fine with a 7.4 2S 1000Mah 15c, do I get longer flight times by simply going to a 7.4 2S 1500 Mah 15c?
Just about have the hang of electric, but this is still a stumper for me.
Yup, providing a battery with more mah (Milliampere Hours) will add more flight time, plus more weight. And the battery weight pretty much goes up in direct proportion to the Mah rating. Would not be to hard to put in a battery that the model airplane can not get off of the ground.
And, if you're running a brush type motor, going to a brushless system alone will make a difference. Or, if you've got a brushless motor with poor efficiency, going to a higher quality motor will also help.
If your model is a slow flying type, and you've got a motor and prop with a high RPM, going to a brushless "Outrunner" type motor, with a larger diameter, slow turning prop will also make a difference. Check out the various Hacker A series motors. These motors are available in power ratings from several dozen watts to many Kilowatts. I've got 7 of them, ranging from an A30-12S motor to A40's, A50's and my new one is a A60-16M, running at 2400 watts (three horsepower)
Check out one of those PC spreadsheets, such as www.motocalc.com
, that will allow you to put in your models specifications, motor specs, battery and ESC. This program is free for 30 days, then its $39, and IMHO, well worth it.
But this program is only as good as the data going in, and some of those very inexpensive imported brushless motors have poor accuracy on their specifications.