I got around to building the battery tray for mine this weekend. This was the last project for mine before being ready to fly.

I weighed the airplane with the first battery tray I built. It was built out of the honeycomb laminate. Total weight was 11 pounds 3 oz. Awcrap.

I thought for a while and knew I didn't know where the CG was going to be exactly so the battery had to be able to move.

I came up with a method tying the front and rear landing gear plates together with 1/4" carbon tubes that I could slide the batteries on.

I checked the CG and found it too far aft.

New flying buddy came over for a consult we then decided to move the tubes forward and tie them into the firewall.

This allowed the batteries to move just over 2 inches which should give me the correct CG range.








Best thing, it's 2 ounces lighter than the first tray.

Tim