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Randy, I use one 15 lbs Odyssey P680 battery - replaced two 25AH Concord batteries which weighed 22 lbs each. The Odyssey has become very popular with the RV crowd due to its long life, strong starting capability and small size/weight and reasonable price. Here is URL for one web site with lots of info on it - but, you can do better on price than this site.
http://www.batterymart.com/p-odyssey-pc680-battery.html
IF you want the utmost and are willing to pay the price, Bill Jepson, is developing a battery that is very potent.
Ed
----- Original Message ----- From: "randy echtinaw" <rjechtinaw@toast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 01, 2007 7:50 PM
Subject: [FlyRotary] Batteries
Gentlemen,
I am going to install a p-ported RX8 fuel injected engine with dual electric systems. What size batteries do I need to be able to start on both and run on either/or so I can build the battery boxes. Amp/hr rating - brand ? As this is an aerobatic plane they also need to be sealed batteries.
Thank you,
Randy
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