I've never had this much trouble launching a wing, but it eventually took to the sky. The first attempts with autolaunch failed, so I finally switched to manual mode and launched it LOS (line of sight). Once autotrim, autolevel and autotune did their jobs, I tried autolaunch for the second battery and it worked (but it was still a bit sketchy). I normally maiden all my builds with INAV autolaunch and they've all been perfect. I think my Dolphin may have a bad thrust angle, so I will test that next...

ATOMRC Dolphin Kit
TMotor Velox V3 2207 1950kv motor
Gemfan 7042 prop
Strix 65A BLHeli ESC
Speedybee F405 Wing FC
EMAX ES09MD Servo's
Radiomaster RP1 ELRS RX
BE250 GPS
18650 4S1P 3000mAh & 2800mAh
Walksnail Moonlight VTX/CAM kit on VBAT
COB 3mm 12V LED's powered by FC BEC