BobCat1506,

I just maidened my Easy Sport-OS46 FX. It check out so nose heavy I couldn't believe the plans. I thought it had to be a mis-print. (spent 2 hr on RCU researching ES posts)

My original guestimate was 4 oz of lead in the tail to balance.
Well, that's just nuts. So I decided to move my battery as far aft as possible-- behind the servoes against the rear bulkhead.

To fit the battery, I had to remove the linkages and the servos.(that I had just so carefully calibrated.) [].
After reinstalling sevoes, et al, it's back on the cg stand. Damn, it still needs over 2 oz of lead to balance. I added 1 oz ea(2) of tire, stick-on weights to each side of the tail up under the elevator and rudder push rods. The balance point was only back to 4" not 4 1/8th called for, but close enough for govt work. When I got to the field I noticed the throws on the rudder were not even. (Big caution here) The rudder control horn was hitting on the lead weight I had added. Had to cut down the throws to try and even them out. (after all this work, its going up). Flew like I knew what I was doing. 1 click rt and 1 click up. I think it's still a little nose heavy, but what to do?
I can only imagine the balance problem I'd have faced, if I went with the OS 70 FS that I was going to put on it.

Me wonders if this is a recent problem with the ES? Also, those flying with 70 FS engines, concrete tails?

Fair winds and blue skys to all,

B...