I've read the manual it states 5 7/8 but some have adjusted it between 6 and 7 inched. I've used a MAC calculator using 25-30% and it comes out less then 5 7/8.more like 4.25-5.1. wing span 80.5 cord 17. has anyone used 1 inch wooden dowels for stand offs? they wont be long ill start at 2 inches and cut them back 1/4 inch at a time just trying to save from having to add lead weight. Also I have to fix the elevator seems that when the servo is moving the elevator up and down the horizontal stabilizer is flexing up and down not good I've redid the elevator twice thinking I might have gotten a robart hinge cocked This is not my first ARF I've put together but this one is A challenge for sure michael