Complex sentence: The Minibat was designed by Haig as a motor glider, but without self-launching capabilities, instead the aircraft is launched by aero-tow, winch-launch or car-tow.
Split into simpler sentences: The Minibat was designed by Haig as a motor glider, but without self-launching capabilities. Instead the aircraft is launched by aero-tow, winch-launch or car-tow.