@@TheGoodLife62 The recommended 2200mah 4S 60C works great but if they puff a little they no longer fit in the fuselage, the 1800mah 4S 70-150 Nanotechs are an easier fit but mine are old & lack top end punch. I have also flown on 2200 3S 30C and these are great for thermalling but only give about 2/3 speed. When using the correct battery the Excalibur will clock 171KPH on a good day. CG balance is not an issue with any of the batteries & there is very little room for adjustment.
@@TheGoodLife62 Check the inside of your canopy & see if it has reinforcing ribs, my latest one has but me previous one (that I flew into the ground) didnt & the prop could catch under the canopy edge during a non powered hi-speed dive. I fitted a small clear plastic tab, fixed to the fuselage & lapped over the LHS of the canopy to fix the problem.
