Hi Mick, Thanks for your reply .
Hacker =www.hacker-model.com (or .cz) my old site
www.psit.ca . Also see THIS Scorpion on my WIMAC page "Scorpion Motor Glider Repairs" photos. V-Tail fiberglass fuse, approx 2 pounds total -has progressively rearward swept leading edge on wing tips at a dihedral of about 7 to 10 deg. up from mainwing ( pics).
I just want to "balance it" and trim it for even nose-first flight and speed-wise/climb rate enough to get it up say 500 to 600 ft/min (?). Currently 1200mah LiPo 3 cell -10c plan to switch to brushless. Hitec RX Feather FM CH 12. Now 480 brush e-flite 25A cont. + 6X3 prop underpowered = motor spins at 12800 rpm.
Hope this is useful I am at witt's end! Thanks,
Pierre Sarault, Tel.: 514-481-2617