STOL CH 701 Sport Utility Kit Aircraft

STOL Series
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PHOTO LIBRARY
CUSTOM and ALTERNATIVE AIRCRAFT ENGINE INSTALLATIONS
STOL CH 701 - Page Two of Two - Click here for Page One

The Rotax 912 series engine (80 or 100 hp) is the standard recommended powerplant for the STOL CH 701.  Other engine installations are not directly supported by Zenith Aircraft Co., and will affect the performance and specifications of the aircraft. Suitable engines for the STOL CH 701: 50 - 100 hp, up to 185 lbs. installed weight.

Alternative Engines:  Following are photos of just some of the many different alternative engines that have been installed in the STOL CH 701.  Note that alternative engines are not supported by Zenith Aircraft Co., and will affect the performance and specifications of the aircraft.  Click here for more info.

Note: The STOL CH 701 is probably the most copied sport aircraft on the market today, and there are a number of Rotax firewall forward installations being marketed as "improved" or lower cost alternatives, many with undemonstrated performance claims (cruising an aircraft at or near VNE is not recommended).

Continental O-200 engine installation in a Zenair STOL CH 701 A Continental O-200 engine installation in a STOL CH 701 (amphibian).
Continental engine installation in a STOL CH 701 Custom Continental engine installation.
Continental engine installation in a STOL CH 701    
turboprop installation: Garret JFS100-13 turbine on the Zenair STOL CH701 Custom turboprop installation, using a converted Garret JFS100-13 turbine (jet) engine.
turboprop installation: Garret JFS100-13 turbine on the Zenair STOL CH701     The custom cowl and characteristic long nose for the turboprop STOL CH 701
turboprop installation: Garret JFS100-13 turbine on the STOL CH 701     The custom cowl for the turboprop STOL CH 701

Custom VW (Volkswagen) engine installations in the STOL CH 701:

Geared VW engine installation in a Zenair STOL CH 701 Custom cowl for the geared VW.
Geared VW engine installation in a Zenair STOL CH 701
VW engine installation in a STOL CH 701 The engine is a 1915 cc VW with a Valley Engineering reduction drive turning a 72 in. 3 blade ground-adjustable Ivo prop. 
Static thrust is 362 Ibs. at 3700 rpm. 
Geared VW engine installation in a STOL CH 701 Geared VW engine from Valley Engineering of Rolla, Missouri, offered for sale as a complete firewall-forward package for the STOL CH 701.
Geared VW engine installation from Valley Engineering Geared VW engine installation from Valley Engineering on the STOL CH 701 with a large Culver prop for good STOL performance.
Custom cowl for a Great Plains VW installation Ron Jennings' custom cowl for a Revmaster 2100D direct-drive installation.
VW engine installation in a Zenair STOL CH 701 - Brazil This is a custom direct-drive VW conversion from Brazil - installed in a STOL CH 701.
Geared VW engine installation in a Zenair STOL CH 701 - Brazil Custom VW installation with a blower compressor: VW 1.6, up to 120 BHP
VW 1.6, up to 120 BHP: Geared VW engine installation in a Zenair STOL CH 701 - Brazil Testing the custom VW installation with a blower compressor: VW 1.6, up to 120 BHP
Alivion VW 100 hp Custom VW conversion from Brazil. 

Builder Julio Marques Vieira states the at VW engines puts out up to 100 hp and weight 90 kg.

VW conversion from Brazil. Direct drive VW engine installation
VW conversion from Brazil. Custom VW conversion from Brazil (direct drive installation). 
VW conversion from Brazil. Direct drive VW engine installation
VW engine installation in a Zenair STOL CH 701 - Brazil Making a custom cowl for a Volkswagen engine installation.
VW Cowl Making another mold for a custom cowl for a VW installation.
Custom VW installation Custom VW installation on a STOL CH 701.
Custom VW installation Custom VW installation (direct drive)

Simonini Victor II custom engine installation

Owner report:

The engine is the Simonini Victor II from Italy. The engine is a nickasil ceramic coated engine, rated at 92 hp. Weight is 104 lbs with radiator and fluids. It has the same bolt pattern as the Rotax 582 it replaced but is slightly wider because of the location of the starter. The original mount had to be widened to allow for this and every modified corner was gusseted in the mount and every leg starting at the gusset was increased 50% in wall thickness. The cowling bottom had to be cut to accept the exit of the tuned exhaust system. The radiator had to be moved also and turned lengthwise. The engine burns 2.5 to 3 gallons an hr. 33:1 two-stroke pre-mix . 

I now have nearly 100 hrs on the engine and it has been very good. Because of the low fuel burn, the 15 gallons of fuel on board has now more than doubled my flying time. There is less noise and vibration than the 582 and the TBO of the Victor II has recently been raised from 600 hrs to 800hrs by the factory. My cost for this engine was $4800 at the time of purchase. I am using the recommended prop which is a ground adjustable DUC 68". The gearbox is Simonini also and is a 3:1 internally cushioned drive.

I recommend this engine for fuel, longevity and low weight for the CH 701 both as a replacement for the 582 and as a first choice low cost alternative.

STOL CH 701 owner Lynn Sanderson, Conde, South Dakota

 

Simonini Victor II custom engine installation
Simonini Victor II custom engine installation
Simonini Victor II custom engine installation

Corvair powered Zenair STOL CH701 A custom Corvair installation by STOL CH 701 builder John Lowther (New Zealand): 
"The Corvair engine is lightened, no starter, etc., and odd bits of titanium and carbon fiber also helped. The empty weight 12 kg (26 lbs.) more than a 912 powered 701."
Corvair Running-up the custom Corvair installation.
custom Corvair installation in a STOL CH 701. A different custom Corvair installation in a STOL CH 701.
custom engine installation Fitting a custom Corvair installation to a STOL CH 701.
NISSAN MA 12 motor A custom Nissan auto conversion: Nissan MA 12
Radial: 110 HP, 7 Cylinder Custom Rotec radial engine installation on a STOL CH 701 (tail-dragger gear configuration).
Custom Rotec radial engine installation Custom Rotec radial engine installation on a STOL CH 701
Custom Rotec radial engine installation Custom Rotec radial engine installation on a STOL CH 701 (tricycle gear).
Custom Rotec radial engine installation Custom Rotec radial engine installation on a STOL CH 701 (tail-dragger gear configuration).

Suzuki 1.3 Custom Engine Installations
Suzuki 1.3 EFI auto conversion engine Suzuki 1.3 EFI

A custom Suzuki/Geo automotive conversion and installation in a STOL CH 701 aircraft. 

Suzuki 1.3 EFI auto conversion engine Another view of the Suzuki 1.3 EFI engine.

Suzuki/Geo automotive conversion.

SUZUKI 1.3L using the Raven 1300 SVS Redrive SUZUKI 1.3L using the Raven 1300 SVS Redrive, as installed on Rick Roberts' STOL CH 701.
  • Click here to view more photos and details about Rick Roberts' STOL CH 701 project.
SUZUKI 1.3L using the Raven 1300 SVS Redrive
Installing the custom Suzuki 1.3 engine to the Zenith 701 SUZUKI 1.3L using the Raven 1300 SVS Redrive
Installing the custom Suzuki 1.3 engine to the Zenith 701 SUZUKI 1.3L using the Raven 1300 SVS Redrive
Installing the custom Suzuki 1.3 engine to the Zenith 701 SUZUKI 1.3L using the Raven 1300 SVS Redrive
Installing the custom Suzuki 1.3 engine to the Zenith 701 SUZUKI 1.3L using the Raven 1300 SVS Redrive
SUZUKI 1.3L using the Raven 1300 SVS Redrive SUZUKI 1.3L using the Raven 1300 SVS Redrive
Suzuki auto conversion engine custom installation in a Zenair STOL CH 701 A Suzuki auto conversion engine custom installation in a Zenair STOL CH 701
A different installation and conversion of a Suzuki/Geo automotive engine for the STOL CH 701.

...And More Custom Engine Installations:
jpx-1.jpg (48054 bytes) Custom JPX (85-hp) engine installation.
jpx-2.jpg (38425 bytes) Custom engine nosebowl cowl.
701-ea-81.jpg (44225 bytes) Custom Subaru EA-81 engine installation
l-m-lookinggood.jpg (34563 bytes) Custom cowl for a Subaru installation
7baner-subaru1.jpg (62802 bytes) Richard Baner of Eureka, Illinois writes:
"My planes been complete for many years now, and I've tried several engines out: first a 2180 Great Plains VW, then a Rotax 503, then a stock Subaru EA-81, and finally a modified Subaru EA-81 with computerized fuel injection and airmotive electronic waste spark dual ignition."
reduktor-21.jpg (49064 bytes) A Russian engine (?)
sam-11.jpg (48945 bytes)
Hirth F30 installation Custom Hirth F30 installation
Hirth F30 installation Hirth F30 engine installation
custom engine installation
custom alternative engine installation
custom alternative engine installation custom engine installation
custom alternative engine installation
NEW 100-hp Rotax 912S Firewall Forward Installation NEW 100-hp Rotax 912S Firewall Forward Installation Package with rear ring engine mount for smoother operation.

Rotax 912 Installation Tips & Techniques

How-To Engine DVDs from HomeBuiltHELP.com

Other hands-on building DVDs from HomeBuiltHELP.com



Note that alternative engines are not directly supported by Zenith Aircraft Co., and will affect the performance and specifications of the aircraft.  Click here for more info.

Most these images show customer-built aircraft which have been modified without the designer's specific approval. Modifications affect the specifications and performance of the aircraft.


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Zenith Aircraft Company: 2013-05-06