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The aircraft I have chosen to build is the Onex from  Sonex Aircraft.  This affordable metal, aerobatic, single seat aircraft  has great performance and  a folding wing.I will be building the tricycle gear version and fitting the aircraft with a hand control for operation of the rudder.

The aircraft's recommended powerplant is the 80 hp VW based AeroVee 2.1 engine, supplied in kit form by Sonex AeroConversions.
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This is the only non-metal aircraft on my short list. It is built out of glass fibre.  The aircraft has a large 29" cockpit and a "Y" tail. 

The prototype aircraft is powered by the proven Corvair automotive engine converted for aircraft use by William Wayne, a.k.a. the Corvair authority.
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The Thatcher CX4 is a single seat, metal aircraft with a tail wheel landing gear.  The designer David Thatcher wanted an affordable aircraft that he could enjoy flying during his retirement. 

So he designed and built the CX4.  This beautiful aircraft is powered by a VW automotive conversion engine from Great Plains Aircraft Supply.
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The Sonex is an affordable, aerobatic, two place monoplane, first introduced in 1988.  It is available with a tail wheel or tricycle landing gear, and there is also a beautiful "Y" tailed version the Waiex.

The Sonex and Waiex deliver outstanding performance due to their clean aerodynamic shape and simple lightweight construction. 
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Welcome to


AeroVee 2.1

AeroVee Engine Kit AeroVee 2.1 Aircraft Engine

The AeroVee 2 .1 is a VW-based automotive conversion engine kit package.   This  2180 cc 80 hp engine that can be run Avgas or Autofuel.  The engine package weighs 168 lbs including exhaust or 158 lbs with the optional  Nikasil Cylinder upgrade. 

The engine kit components are all brand-new zero time parts. Sonex state that the engine kit can be assembled in approximately 12 hours with the aid of the AeroVee assembly manual and instructional DVD.  

The engine has two spark plugs per cylinder and four independent solid-state ignition modules all driven of the crankshaft/fly wheel assembly.   The secondary electronic ignition  adds duel plus ignition reliability by completing the Aerovee's  quadruple- redundant ignition system  

AeroVee 2.1 Specifications

Continuous Horsepower                  80 HP @3400 RPM                                         
Bore 92mm
Stroke 82mm
Displacement 2180 cc
Compression Ratio 8:1 for AvGass
7:1 for Auto Fuel
Oil Capacity 2.75 US Quarts
Oil Type SAE Multi Grade 20/50
Firing Order 1-4-3-2
Spark Plugs Autolite MP4163
Carburetor AeroInjector
Starter SkyTec Geared Starter
Alternator Output 20 Amp
Weight 168 lbs with Exhust
158 with Nikasil Cyclinders
Battery Required 12v @20 Amp

Engine Dimensions

AeroVee 2.1 Engine Dimensions Width AeroVee Engine Diensions Depth AeroVee Engine Dimensions Height

Engine Selection

AeroVee 2.1
AeroVee 2.1 Aircraft Engine 

An 80hp engine kit by AeroConversions.

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Jabiru 2200
Jabiru 2200 Aircraft engine

An 80hp engine from Australia.

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ULPower 260i
UL Power 260i Aercraft Engine

Powerful 97hp, fuel injected. engine

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