The Sonex Aircraft Onex is a single-seat kit-built sport aircraft built for recreational flying, offering a compact design with folding wings for space-saving storage and easier ground handling. Discover Sonex Aircraft Onex for sale worldwide on AvPay. Browse active Sonex Aircraft Onex listings and find available aircraft across the USA, North America, UK, Europe, Asia, Africa, Australia and South America. Connect directly with aircraft brokers, private sellers, flying clubs, flight schools and manufacturers. Explore the full inventory of aircraft for sale on AvPay here!
Finding a Sonex Aircraft Onex for Sale on AvPay
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Interesting facts about the Sonex Aircraft Onex
✈ The Sonex Aircraft Onex is a single seat, low wing, all metal kit aircraft developed by Sonex Aircraft in Oshkosh, Wisconsin for sport and recreational flying.
✈ Sonex introduced the Onex as a compact derivative of the earlier Sonex two seat design, aiming to reduce build cost, footprint and operating expense.
✈ The aircraft uses conventional tailwheel landing gear as standard, which appeals to pilots seeking traditional stick and rudder handling.
✈ The structure is primarily 6061 aluminum with pulled rivet construction, allowing first time builders to complete the airframe without complex tooling.
✈ Many Onex aircraft fly with the 80 hp AeroVee 2180 engine, a purpose developed conversion based on Volkswagen architecture supplied in kit form by the manufacturer.
✈ With an empty weight around 600 lb when fitted with the 80 hp AeroVee installation, the aircraft delivers strong performance from modest power.
✈ Folding wings are available as an option, reducing storage width significantly and making the Onex practical for owners with limited hangar space.
✈ The Onex is typically operated under Experimental Amateur Built or equivalent regulations, giving owners flexibility in avionics configuration and ongoing maintenance.
Model Variants for buyers to consider when purchasing a Sonex Aircraft Onex
The Sonex Aircraft Onex is primarily offered as a single seat kit aircraft rather than as multiple formally designated production variants. Buyers will encounter differences based on engine installation, most commonly the 80 hp AeroVee 2180, along with occasional alternative approved powerplants. Some aircraft feature standard span wings while others include the factory folding wing option which affects storage and transport considerations. Avionics, canopy configuration and landing gear details may vary between individual builds due to the Experimental Amateur Built category. Prospective owners should evaluate each aircraft on its build quality, engine choice, total time and documentation rather than relying on variant naming.
Sonex Aircraft Onex Specifications
Information provided here is as a guide only. This information should not be used for flight planning or other aircraft operations. Aircraft model variations, custom specifications, modifications, upgrades and age will have a considerable impact on the details listed below. Please check with the seller, manufacturer or aviation authority for the precise aircraft specifications.
Length: 16 ft 5 in
Wingspan: 20 ft, optional 18 ft 9 in
Wing Area: 84.4 sq ft, optional 78.0 sq ft
Empty Weight: 600 lb with 80 hp AeroVee 2180 installation
Fuel Capacity: 15 US gal
Maximum Speed (VNE): 216 mph
Cruise Speed at Sea Level: 135 mph
Cruise Speed at 8000 ft TAS: 155 mph
Range: 535 miles
Service Ceiling: 16,000 ft
Take Off Distance: 400 ft
Landing Distance: 500 ft
FAQs About the Sonex Aircraft Onex
How much does a Sonex Aircraft Onex cost?
As of 2024, completed Sonex Aircraft Onex examples on the US market have commonly been advertised between approximately $25,000 and $45,000 depending on engine choice, avionics fit, build quality and total time. Individual aircraft values vary significantly based on workmanship and equipment.
What engine is typically fitted to the Sonex Aircraft Onex?
Many aircraft use the 80 hp AeroVee 2180 engine supplied by Sonex Aircraft, though some builders install other approved powerplants. Engine selection influences performance, weight and resale appeal.
Is the Sonex Aircraft Onex aerobatic?
The Onex was designed for sport flying and can be built to meet aerobatic operating limitations where configured appropriately. Buyers should confirm the specific aircraft’s build documentation and operating limitations before assuming aerobatic capability.
Does the Sonex Aircraft Onex have folding wings?
A factory folding wing option is available. This feature reduces overall storage width and can lower hangar costs, making it attractive to owners operating from space constrained facilities.
What licence is required to fly a Sonex Aircraft Onex?
Licence requirements depend on the country of registration and the aircraft’s operating category. In the United States it is commonly flown under Experimental Amateur Built rules and may be operated by pilots holding appropriate sport or private pilot privileges depending on weight and configuration.
Get help buying a Sonex Aircraft Onex
Can’t find the Sonex Aircraft Onex aircraft you’re looking for? Get in touch with an Aircraft Broker to help you buy an aircraft via the Aircraft Broker Directory. Alternatively you can browse Aircraft Brokerage and Aircraft Acquisition Services through the aviation marketplace to help you with the purchase of a Sonex Aircraft Onex airplane.
Sell your Sonex Aircraft Onex on AvPay
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Find Finance for buying a Sonex Aircraft Onex
Financing a Sonex Aircraft Onex often requires lenders familiar with Experimental Amateur Built aircraft and kit constructed airframes. Specialist aviation finance providers can assess the aircraft’s build quality, engine type and market liquidity before structuring a loan. Buyers should prepare detailed logbooks, airworthiness documentation and a recent condition inspection to support the application. Working with finance professionals who understand light sport and homebuilt aircraft can improve approval speed and loan terms.
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Find Insurance for a Sonex Aircraft Onex
Insuring a Sonex Aircraft Onex requires brokers experienced with Experimental Amateur Built aircraft and single seat sport designs. Underwriters will review pilot experience, tailwheel time and time on type when determining premiums. Hull value should reflect the true market value of the aircraft including avionics and engine installation. Liability limits, ground risk coverage and any aerobatic use must be clearly declared to ensure appropriate protection. Working with aviation specialists helps secure coverage tailored to this specific aircraft category.
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