Performance - Zenith STOL CH 750 Super Duty
Like its predecessors, the STOL CH750 SD offers extraordinary STOL performance. The factory demonstrator aircraft can take off in only 115 feet with 205 horsepower. It climbs at 1,350 feet per minute, and cruise speed is respectable at 105 mph in stock configuration (with bush tires). The landing roll is just 150 feet. The 34 mile per hour stall speed means the airplane excels at slow flight, with excellent maneuverability right down to the gentle, mushing stall.
The Zenith Aircraft prototype STOL CH 750 SD is powered by a 205 hp IO-375 engine from Aero Sport Power. Like all Chris Heintz designs, the Super Duty is not designed around any particular engine, which gives you the freedom to choose the engine that best fits your performance needs and budget restrictions. The suitable range is 150-230 horsepower.
| Performance | IO-375 (205hp) | |
|---|---|---|
| Single: | Gross: | |
| Take-off Roll | 115ft | 115ft |
| Landing Roll | 150ft | 150ft |
| Cruise (75% Sea Level) | 105mph | 105mph |
| Stall Speed | 34mph | 34mph |
| Rate of Climb | 1350fpm | 1350fpm |
| Range(standard miles) | 400 miles | 400 miles |
| Endurance | 3.8 hours | 3.8 hours |
Like the other Zenith CH 750 models, the new Super Duty offers a huge cabin, side-by-side seating, easy cabin access though two big swing-up bubble doors, adjustable seats, a raised skylight, and lots of head room. Over the nose visibility on the ground is excellent because of the tricycle gear, and the direct-linkage steerable nosewheel makes ground handling easy.
The Specifications of the Zenith STOL CH 750 Super Duty Prototype
The CH 750 Super Duty features the fixed leading-edge wing slats and full-length flaperons which are common to all Zenith STOL designs. Both these features contribute to the slow flight handling that makes these airplanes so good at STOL operations; the slats increase lift at high angles of attack and the flaperons give more flap surface than simple flaps alone. The Super Duty wingspan is 33 feet 5 inches long, which is 3 feet 7 inches longer than the original STOL CH 750‘s wingspan. This increases the wing area to 162 square feet, adding load carrying capacity while keeping best-of-class short takeoff and landing capability. The Super Duty takes off in only 15 more feet than the original STOL CH 750, but can carry 135 pounds more! The 1900 pound gross weight gives a useful load of 800 pounds. Zenair floats are available for the Super Duty, and give an even higher 2,200 pound gross weight. When increasing the gross weight to 2,200 lbs, performances will change and the “G” loads will decrease.
The Super Duty cabin is 42 inches wide, and the standard bubble doors add another 8 inches, for a spacious total of 50 inches (over four feet). The front seats are adjustable, so no matter your size you can always reach the rudder pedals. The STOL CH 750 has always had a large rear cabin area, but on the Super Duty model there is room for an extra person back there. With the rear jump seat you can take another person along for the ride, or carry up to an additional 200 pounds of baggage.
| Specifications (prototype aircraft) | Zenith CH750 Super Duty |
|---|---|
| Wing Span | 33ft 5in |
| Wing Area | 162 sq.ft. |
| Length | 22ft 0in |
| Horizontal Tail Span | 10ft 1in |
| Rudder Tip Height | 9ft 0in |
| Empty Weight | 1100lbs |
| Design Gross Weight | 1900lbs |
| Useful Load | 800lbs |
| Wing Loading | 11.73lbs/ft |
| Power Loading | 9.27lbs/bhp |
| Never Exceed Speed (VNE) | 140mph |
| Limit Load Factor (G) | +6.0/-3.0 g |
| Fuel Capacity | 48 Gal. (24 Gal./wing) |
| Cabin Width | 42in |
| Cabin Width (bubble doors) | 50in |
| Suitable Power | 150-230hp, 350 lbs max |
