Sonerai aircraft models are plans-built aircraft only.
The Bottom Line: What Will My Sonerai Cost?
The Sonerai family of homebuilt aircraft started it all for Sonex Founder & President and EAA Homebuilt Hall of Fame inductee John Monnett. The Sonerai I was his first design, and was introduced to the world at the 1971 EAA Convention at Oshkosh, WI. It was designed to meet the requirements of the Formula Vee racing rules. The very popular Sonerai II followed in 1973. The low-wing Sonerai IIL followed in 1980, and the Sonerai IILT tricycle geared version in 1983. The Stretched Sonerai IILTS and IILS were introduced in 1984. The Sonerai II in its various versions is among the most popular homebuilt aircraft ever offered, with several thousand built to date. After nearly 50 years, the Sonerai still offers the homebuilder a value that is difficult to match.
|The Onex features easily-folding wings for maximum versatility and minimum ownership costs. The folding wing feature provides one handle this is pulled to release two spar pins, one in the main spar, one in the rear spar. With the pins released, the wing is simply folded by-hand into the up position. The wing fold handle has a spring loaded locking pin that keeps the wings locked for flight. The wing fold & unfold/lock process takes only about 30 seconds per wing!
The folding wing design can fit into a garage or share a T-hangar with your flying buddies. It can be trailered on local roads at low speeds with the wings folded, or the wing panels can be easily removed for trailering at highway speeds. Wing fold brackets that fasten to the locking pin holes can be used to secure the wings in the up position for trailering or tie-down.
|The Onex folding wing feature adds tremendous versatility to the aircraft's design, but there are additional features making the Onex design more versatile:
|The large Onex cockpit will accommodate a wider-range of pilots than ever before. Read More|
|At the time of it's introduction, the Onex Complete Airframe Kit and Sub-Kits were the most advanced kits ever produced by Sonex Aircraft, LLC. Onex kit advancements paved the way for upgrades made to other Sonex Aircraft kits in recent years, including more laser-cut parts, formed parts, and machined parts, along with the introduction of the Matched-Hole Formed Parts Kit.
The Matched-Hole Formed Parts Kit allows many Sonex Aircraft kit parts to cleco together right out of the box! This enhancement not only saves construction time and improves accuracy, but also greatly simplifies the Onex plan set with many fewer part details required for builder fabrication. This results in fewer plan sheets.
The Onex kit also features more CNC machined parts, and the impact in-terms of time savings of the Machined Angle Component Kit upgrade is tremendous.
Optional Onex Pre-Assembled Main Wing Spars are riveted like Sonex Spars, but also have the attach bolt holes drilled up to final size. The 3-part wing spar is drilled in a fixture and matched as a set, ready to be installed in the fuselage. These assemblies are also up-drilled and ready for the remaining hardware to be installed by the builder.
The Sonerai I is a mid-wing sport plane racer designed to meet all of the original Professional Race Pilots Association (PRPA) and Formula Vee Racing requirements for 1600cc Volkswagen-powered aircraft. The stock Sonerai I conforms to the SuperVee Air Sports specifications. The Sonerai I will accept engine displacements from 1600cc thru 2180cc. The cockpit is 20” wide.
The wing is composed of two panels that fold alongside the fuselage, enabling the airplane to be towed tail first on its own landing gear. The fuselage and tail surfaces are constructed of standard sizes of 4130 steel tubing, and are fabric covered. The wings are fabricated from aluminum sheet, 0.025” thick for the ribs and skins, and 0.040” thick for the spar channels. Stainless steel flush Cherry N pulled rivets are used for wing skin attachment to simplify assembly. The fiberglass cowling removes easily to allow complete access to the engine, fuel tank, and instruments. The landing gear is a formed aluminum spring manufactured from 5/8” x 5” 2024-T351 bar stock, and uses 5” wheels and ¾” axles. The tailwheel is steerable and the aircraft does not use differential brakes for steering.
|Wing Span:||20' (Option for 18'9")|
|Wing Area:||84.4 sq. ft. (Option for 78.0 sq. ft.)|
|Tail Height (Std Gear):||53"|
|Tail Height (Tri-Gear):||71"|
|Tail Width--with tail tips:||77.5"|
|Total Width w/Wings Folded:||94"|
|Total Height w/Wings Folded:||Under 8' with 20' wing span option
Under 7' with 18'9" wing span option
|Main Gear Width:||62" (with wheel pants)|
|Primary Structure:||6061 aluminum|
|Cockpit Width:||27 in. More Info|
|Fuel Capacity:||15 US Gal.|
|Stall Speed (full flaps):||45 mph [72.4 km/h]|
|Stall Speed (clean):||50 mph [80.5 km/h]|
|Max Flap Extended Speed (Vfe):||110 mph [177 km/h]|
|Maneuvering Speed:||151 mph [243 km/h]|
|Never Exceed Speed (Vne):||216 mph [349 km/h]|
|Performance||80 hp 2180 AeroVee|
|Empty Weight||600 lbs. [272.2 kg]|
|Range (1)||535 miles|
|Cruise Speed @ Sea Level*||135 mph|
|Cruise Speed @ 8000 ft (TAS)||155 mph|
|Power Loading (GW/HP)||11.875|
|T.O. Distance||400 ft|
|Landing Distance||500 ft|
|Service Ceiling (calculated)||16,000 ft|
|Aerobatic Category||80 hp 2180 AeroVee|
|Gross Weight - Aerobatic||950 lbs [430.9 kg]|
|Baggage (Max)||20 lbs|
|Useful Load||350 lbs|
|Rate of Climb||700-900 fpm|
|Positive Load Factor||+6.0 Gs|
|Negative Load Factor||-3.0 Gs|
|CG Limits||20-32% Wing Chord|
*Note: All Models meet FAA Sport Pilot Regulations at maximum continuous power at Sea Level, as required. Read More...
(1) Conservative, low altitude calculation: 135 mph TAS @ 35.5 mpg. At 8,000' AeroVee powered Onex can acheive 155 mph TAS @ 44.25 mpg.
Specifications subject to change without notice.
See detailed pricing below with our cost estimating worksheet* and see why Sonex aircraft offer the Best Sport Aircraft Performance Per Dollar!
|Onex with AeroVee|
|Complete Airframe Kit (1)||$17,495|
|AeroVee Engine (3)||$7,600|
|Engine Options (4)||$580|
*This chart / worksheet is provided to help you calculate an estimated finished cost of your airplane. While these finished costs are accurate as of the date of publication, they are not guaranteed. Some of the items needed to finish your aircraft are not provided by Sonex.
All Prices Subject to Change without notice.
Sonex Aircraft, LLC now offers more options than ever before for building your dream! Options ranging from advanced Quick Build Kits to individual Sub-Kits are available to suit your construction skills, time and budget. Read more about each option by following the links below:
The Fastest, Most Economical way to Kit Build!
Receive Everything in One Complete Kit Package!
Get the Maximum Discounts and Incentives, and Pay Less for Shipping!
Like all other Sonex Aircraft, the Onex is designed for use with the AeroConversions AeroVee Engine. Our simple, low cost, and technically advanced AeroVee Engine Kit is a perfect fit for the Onex, offering outstanding performance and economy.
Customers may optionally install any engine in the 80-130 hp range, with a firewall-forward installation weight not-to-exceed 200 lbs. You may opt to remove engine mounts and cowlings from your kit order to accommodate a custom installation.
For those interested in installing a UL Power 4-cylinder engine in their Onex, UL Power North America has engine mounts available, and engines can be ordered directly from Sonex Aircraft!
The Onex design concept was first unveiled at EAA AirVenture Oshkosh 2009, and instantly became one of the most-anticipated new product offerings from Sonex Aircraft, LLC to-date. Since unveiling, the aircraft's development milestones have been published on our web site.