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Old Oct 01, 2002, 03:42 PM
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sizam's Avatar
Mountain View, CA
Joined Aug 2002
363 Posts
What batteries are you using in your GWS zero?

I'm currently using an 8-cell pack of green Sanyo 720 mAh NiMh 2/3 AAA batts, am getting a good amount of power, and it lasts for about 6 mins. I bought an unpainted Zero with the 370. What packs are you using? I have some CG issues and am actually using an extra AA battery stuck to the motor as ballast so I was thinking of using larger sized cells which would both fix my CG and give me longer flight times. AA 1200 NiMhs maybe?
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Old Oct 01, 2002, 05:02 PM
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cfossa's Avatar
Stow, MA
Joined Mar 2002
1,041 Posts

I'm using 8-call 600 mAh NiMh packs from www.balsapr.com and have the same issue. I needed 3/4 oz of lead on the nose to get and acceptabe c.g. with my Zero. If I had to do it again, the weight would be better spent on heavier batteries.

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Old Oct 01, 2002, 05:25 PM
Registered User
Los Angeles
Joined Apr 2002
29 Posts
bigger batteries

I'm using an 8cell 720Mah pack in my Zero.

I think the tricky part with bigger batteries will be getting the weight far enough forward to keep the CG in place.

I already had to add weight as far forward as I could with the 720s, so I imagine bigger batteries will extend further back pushing weight towards the tail.

Good luck. I'm anxious to see how the bigger batteries work for you.

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Old Oct 01, 2002, 05:51 PM
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Steve McBride's Avatar
Agra, Oklahoma
Joined Feb 2000
5,390 Posts
8 cell pack of 700mah Energizer AAA NiMH and Ray-O-Vac. Like the Energizers better than the other.

Curious about the C.G. issues - I have my 8 cell pack (4 rows of 2) just inside the battery tray - could go farther forward and still have room.

Did you use heavy servos on the rudder and elevator (assuming you used rudder)?

Good luck!

Steve McBride
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Old Oct 01, 2002, 07:26 PM
Captain Carnage says......
AirWarriorBelgy's Avatar
Seminole (St Pete.), Florida/ Seminole Crash Fest
Joined Jun 2002
5,329 Posts

i use the8 cell n-500r 500 mah nicad packs from Trick rc (www.trickrc.com)

when the motor is wanting to, it flies great..... no cog issues here
i am back at 52mm and like the aerobatic capability with slightly heavier tail.

need new motor right now though

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Old Oct 01, 2002, 08:12 PM
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dave morris's Avatar
orlando fl
Joined Oct 2000
5,714 Posts
Also using the 700ma Ray-o-vac nimh AAA. Solder together like this IIIIIIII 8 cells. I like these a lot, seem less picky about charging that the 720's which seem to false peak a lot. the Ray-o-vacs took 770 right off no false peak. I also opened the batt compartment all the way thru the firewall. Now I can slip the pack well into the cowl area, no more CG probs and no nose weight. If you do this use a piece of strapping tape wraped around the pack with a tail long enogh to grab when time to pull the pack out. I also was careful to open up enogh to allow air to flow over the pack. Just remove the cowl and use an exact blade to open the existing hole. If you build a flat pack the hole will need to be opened almost to the very edge of the cowl. I had to sand the compartment forward area as it got a little tight but it work great.
have not timed it yet but should be good duration, last flight cut short due to darkness, but after landing the pack was barely warm, so should last a while.
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Old Oct 02, 2002, 07:58 PM
Registered User
Marshfield, Wisconsin, United States
Joined Sep 2002
1,605 Posts
7cell 600 ma nicd

Been using 7cell 600 ma nicd packs with stock eps 300c at 6 minutes foight time. I see you all are uising nimh packs at 8 cells, i.e. 9 volts+. Can the eps 300 hold up to this voltage ok? Right tnow i like the combo inm using, extruding pack thorugh teh fireall into cowling as suggested. cg 45-50 max. Would i loose anyhtin by going 7cell nimh around 700ma?
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Old Oct 02, 2002, 09:22 PM
a plantin we will go
shelbyville. lnd
Joined Jul 2002
25 Posts
8 cell 2/3a 1000 mah nimh, 370 motor 10/8 apc prop.
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Old Oct 02, 2002, 11:19 PM
Registered User
Joined Sep 2002
81 Posts
just drop in a geared speed 400 center of gravity is fixed !!!

8 600AEs and your off !
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