Mighty Mini Sportster

[Jo's squadron]

My wings weren't perfectly centered on the fuselage, or one wing was slightly longer or heavier than the other. I moved a wing slightly, and it flew without a roll. It's too bad the plans don't show any slots in the wing where the fuselage fits.
I also thought it lost quite a bit of altitude when turning, although mine isn't that heavy, at 240 grams.

Glad you figured it out! I don’t see why it would loose altitude in turns….

 

[andrej]

The Sportster is a bit fiddly to control, meaning you're constantly twitching your finger on the stick. While the FT Mini Arrow is quite sharp and maneuverable, it feels confident in flight.