Gross Weight Increase for STOL CH 750
Light Sport Utility Kit Plane
July 26, 2010 - AirVenture Oshkosh, Wisconsin:
Zenith Aircraft Company has announced a design gross weight increase for
the STOL CH 750
aircraft. The aircraft design gross weight has been increased
from 1,320 lbs. (600 kg) to 1,440 lbs. (650 kg), an increase of 120 lbs. (50
kg). The increase adds significantly to the load carrying capability
of the “light sport utility” aircraft first introduced at AirVenture
(Oshkosh) in July 2008. The gross weight increase applies without
airframe modifications to all aircraft built to drawings Edition 2
(drawings, dated July 20, 2010), and operated as “Amateur-built –
Experimental” aircraft. STOL CH 750 aircraft registered as SLSA and/or
operated by Sport Pilots are not affected as the weight limit per FAA rules
for Light Sport Aircraft (LSA) continues to be 1,320 lbs.
Several rigorous static load tests were performed on the structure in
preparation of this gross weight increase. Aircraft built to
Edition 2 drawings incorporate
structural changes to justify the extra load, especially to accommodate
larger (up to 160-hp) and heavier (up to 280 lbs. installed weight) engines.
“We have not changed the basic design, since the CH 750 offers such great
performance, capabilities and features,” stated
Zenith Aircraft Co. president Sebastien Heintz. “With the Edition
2 drawings we have increased the capabilities of the aircraft, especially
for pilots using the aircraft as a utility plane and to allow for additional
larger engines, such as Lycoming’s new 233 powerplant. Sport Pilots [in the
United States] will continue to be limited to the 1,320 lbs. gross weight,
but with the added peace of mind that the additional margins provide, and
private pilots can take full advantage of the added useful load now
available for the STOL CH 750 registered as a Amateur-Built – Experimental
The STOL CH 750 is an all-metal short take-off and landing (STOL) kit
aircraft designed by veteran aeronautical engineer
Chris Heintz. As a utility STOL design,
the aircraft features a very rugged landing gear with oversized tires for
rough field capability, yet uses a tricycle gear configuration (with
steerable nosewheel) to make it easy to fly (and taxi) even for low time
sport pilots. The high-lift wing features fixed leading edge wing
slats for maximum lift and full-length “Junker”-type flaperons (both
ailerons and flaps) for outstanding slow flight handling characteristics.
The high tail design utilizes an all-flying rudder and a unique inverted
horizontal tail (equipped with micro vortex generators) to help the airplane
achieve steep approaches and short landings. The aircraft features
standard “bubble doors” to maximize both visibility and cabin width, and is
available as a complete kit, with modern features such as match-drilled
pilot-hole parts and components for ease and simplicity of construction.
Powered with the air-cooled six-cylinder Jabiru 3300 engine (105-hp @ 2,950
rpm) the STOL CH 750 has a take off roll of just 100 feet and climbs at
1,000 fpm with two on board. Stall speed is just 35 mph, and cruise is
100 mph, an impressive figure for such a high-lift design.
Today, nearly 500 STOL CH 750 aircraft are under various stages of
construction, with several dozen aircraft already flying around the United
States and around the world. The popular aircraft can be built from
the complete kit, component “buy-as-you-build” kits, or scratch-built from
plans only (blueprints).
For kit builders, a variety of different engine types can power the STOL
CH 750, especially with the new higher gross weight. Current supported
installations include the Jabiru 3300, the Continental O-200 series
(including the lightweight D model), the Rotax 912S and 914 engines, and
various auto conversions such as Corvair, Honda and Subaru conversions.
New installations include the ULPower
series, as well as Lycoming’s
new IO-233 lightweight engine rated at 115 hp. Older Lycoming models such as
the O-235 and O-320 are also suitable for installation (for a maximum
installed weight of 280 lbs.) Sport Pilots will want to keep their
aircraft as light as possible (using a lightweight powerplant) to maximize
their payload while meeting the gross weight requirement of the FAA rules.
Numerous kit options are available to customize the STOL CH 750, including a
folding wings kit, extended range fuel tanks, larger “tundra” tires, and
more. Zenair’s lightweight all-metal
#1450 LSA floats are available for
the STOL CH 750, either in kit form or factory-assembled and ready-to-mount.
See the Zenith STOL CH 750 at AirVenture Oshkosh at the Zenith Aircraft
Company display in the North Aircraft Display #640 and 641. Contact Zenith
Aircraft Co. at 573-581-9000 for more information. Zenith Aircraft
Company: Mexico Memorial Airport (PO Box 650), Mexico, Missouri 65265.