Ok first and formost I want to say this isn't for everyone but is doable as test continue.
DON'T TRY THIS IF YOUR NOT SURE OF WHAT YOUR DOING!!!!
First setup is very important and yes some will say it won't work. This test was done for my own reasons and to see if I can get the a setup at a more reasonable cost for persons new to electric.
Plane a Panacea that was going to be glow and before it was ever ran the electric thing really started to get into full swing. So first I tried the Standard Hacker setup most was using and it worked but!!!! So I changed to AXI starting with the 5330/F3A and Thunderpower 5300's worked great but weight was an issue 11lb 11 oz. I could find maybe 6 oz. but still couldn't make weight. Desided to try the 5320/28 as some had done in CA. lost some power but the 5330/F3A was over powered anyway, IMO. but it did lack speed as the Nat's last year showed the electric may need more of, and the 5320/28 gained 14 rpm per volt as per manufactures specs.
One of the first thing I had to do was limit the amps with throttle ATV because the 5320 would squeel at even 3/4 throttle, so I put my WATTSUP meter on it and set high atv to zero then brought up the ATV till I hear the squeel and back it off a few amps from that. I ended at 65% high end ( this limited the amps to 60 at full throttle) and 43% low end to get the throttle to be off at lowest stick position.
Now what happened really started to get my attention, with a 20X11 apc e prop, I was only using 2000-2600 mah per flight less than 1/2 the capacity of the 5300's, tried the 19X12 and felt it was to fast, and the 18x12 all APC e props, and it was way to fast, that was last fall. Well this spring changed my mind the 18X12 seemed right, much more of a glow feel. So my question was if I'm only using 1/2 the capacity of the 5300's what could I use closer to the mah I was using with still some to spare, I knew the guys in CA was using the 3700 flightpowers and was really interested in trying them and had all intentions of doing it but I would still only be using 60% of that pack, could I go even smaller? Well check different lipo manufactures I found that ThunderPower had a new 3300 10sx that weighted 29oz instead of the 40 oz of the 5300's (10S) and the 3300 was rated at 82 amps continuous, over 25% more than I was using, and even 2600 was 80 % of capacity which was about 25% more than I was using at the time, but it would loss 11 oz. over the 5300's. total difference from AXI 5330/F3A and 5300's and the 5320/28 with 3300 10sx a big 17 oz. Now I still haven't made some weight saving that I can when I redo paint and firewall and some other weight saving but my plane is still only 10lb. 6 oz and can easy loose 5-6 oz with more mods. A new plane could make 10 lb easy. Something else of note would be that charging at a contest without 120 power because of lower mah get more charges from deep cycle battery. Attached is a file from Micro logger first flight and 52nd flight.
I'll add that I'm flying masters this year and plenty for the flight but thats it land 8 minutes tops if you fly to far out and I'm talking way out your going to run into 3000 mah but at 150 you have plenty. I've been flying in 20-25 MPH winds at 720 ft msl and I'm using 2600-2700 mah.or 80% of capacity.
Set up as follows.
Axi 5320/28 (set to max 60 amps)
CC 85 HV (readyheli.com) best price I have found ( AND USE FIXED END POINTS)
TP 3300 10sx ( Don Shulman at shulman avaiation.com)
Thunderpower 1010 Charger and 210 balancer
deep cycle battery
cost about $1200 with 2 flight packs

DO NOT FLY LONGER THAN 8 MINUTES TAKE OFF TO LANDING. If you want to try this approach do short flights till you get a feel for it, it is plenty for the sportsman, intermediate, and advanced, and I'm doing master with it.

Steve Maxwell