Complex sentence: The Zodiac 601 HD is a light two seat aircraft.The ZODIAC CH 601 HD is the new model of the ZODIAC CH 600, which was designed by Chris Heintz as a low-cost trainer aircraft.
Split into simpler sentences: The Zodiac 601 HD is a light two seat aircraft. It is the new model of the ZODIAC CH 600, which was designed by Chris Heintz as a low-cost trainer aircraft.