The CH 300 is an enlarged three-seat derivative of the
Zenair Zenith CH 200, designed by
Chris Heintz in the mid 1970s as the Tri-Zénith. Like the CH 200, it is a low-winged
monoplane of all-metal construction with a fixed
nosewheel undercarriage, but is larger and more powerful, and is fitted with a rear bench seat capable of accommodating a third adult or two children, and is fitted with a forward sliding canopy. It is designed to be powered by an engine giving between 125 and 180 hp (93 and 134 kW). The first example made its maiden flight on 9 July 1977, with over 400 sets of plans sold by 1982. Plans for the CH 300 remained on sale in 1999. The Zenair CH 300 formed the basis for the factory built
Zenair CH-2000, which first flew in 1993. ==Variants==