External antenna causing aerodynamic problems on small models?
The thing we do with S400 pylon planes is to get rid of the flimsy, whip antenna wire and substitute it with fine piano wire or guitar string (metal stuff). Thickness does not matter but length must be exact to the original!!In the end you have a more stream line antenna that doesn't whip in the air like the flexible one. I don't trust the small, loaded antennas in high speed stuff and to this day I have had 100% success with this stiffened antenna. The trick to soldering it up is to leave about 2" of the original outside of the receiver, strip about 3/8" off end of 2" wire stub, rough up the end 1" of the metal piano wire surface with rough grit sandpaper, make a 180* bend (tight loop), and then thread the exposed wire through the slot. Solder the joint and add heat shrink for added measure.