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Sonic – Sonex-B // Almost Finished Project // No Reserve // N477KD

Auction Start: January 24, 2024
Auction End: January 31, 2024 12:00 pm

SONEX Model B Details







Auction Start Date:
January 24, 2024
Auction Start Date:


Serial No:








Location: Eau Claire Wisconsin
Description: This immaculate project Sonex model-B is being presented with a no reserve auction. The aircraft has been registered with the FAA but has never received an airworthiness certificate. The project could be completed and fly off program hours could be completed with the involvement of an A&P on the project. An alternative use for this project could be parting out the build to sell off the parts, or use the engine to complete another project. This whole project can be purchased for a fraction of just the engine cost. The airframe could be repurposed as a centerpiece for a FBO, restaurant, man cave, or a property entrance. Project aircraft shows in like new condition. The project has been stored inside its whole life, and the engine has been preserved in mineral oil.
Airframe Details
  • Sonex-B
  • S/N 1152
  • 0 time
Engine Details
  • Aerovee 80HP 4 cylinder normally aspirated 
  • Engine has been pickled with mineral oil.
  • 0 time
Propeller Details
  • Sensenich 2 blade prop 
  • Fixed pitch
  • 0 time
Avionics Details
  • Dynon Avionics EMS-D10 EFIS
  • Vertical Speed Indicator 
  • Altimeter
  • Airspeed
  • Trim control 
  • Throttle assembly 
  • Dual center stick
Additional Features
  • Comes with complete set of plans
Red, and white, with black accents.
Black cloth seat, bare metal finish throughout interior.
Auction Details
Contact Phone: 254-735-5030
Contact Email:
Registration Number: N477KD
Model: SONEX Model B
Required Deposit: $500
Buyers Premium: 6%
Start Date: January 24, 2024
End Date: January 31, 2024 12:00 pm
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The Sonex-B N477KD: A No Reserve Gem in Aviation History

The aviation world is abuzz with anticipation as the Sonex N477KD takes center stage in an upcoming auction. This nearly finished project, a Sonex model-B, is not just another unfinished project, its is so close to done the new owner will truly benefit from the sum of the parts being more than the parts alone. THe new owner could grab the engine for another purpose and keep the sleek body as a display piece or finish the small amount of avionics work, fly off the 40 and have an airplane for an incredible value. This auction has no reserve and a starting bid of $2,000.

Sonex advertises The sport aircraft reality check and “More of what you want”. Both ring true with this stubbed all metal kit plane. The kit costs nearly $50k plus an engine. This kit is complete. I have never had the opportunity to fly the Sonex 3 but it is reported to have playful and dynamic flight characteristics. This is the most affordable kit plane, truly balancing affordability, simplicity, versatility and performance. With two seats its more fun than a barrel of monkeys as you barrel roll.

History and Sonex Heritage

The Sonex N477KD is not merely an aircraft; it’s an affordable kit plane packed with all the essentials to dance in the skies for less than a new SUV. The Sonex lineage traces its roots to the early 2000s when visionary aircraft designer John Monnett founded Sonex Aircraft, LLC. The company aimed to provide aviation enthusiasts with affordable, easy-to-build aircraft without compromising on performance.

The Sonex model-B, with serial number 1152, exemplifies the evolution of the Sonex series. Its history is interwoven with the DNA of innovation and a commitment to delivering quality flying experiences. Sonex aircraft are renowned for their sleek designs, efficient aerodynamics, and the thrill they bring to pilots worldwide.

No Reserve: A Game-Changer

What sets the upcoming auction for Sonex 3 N477KD apart is it being a no reserve auction. With bids starting at just $2,000 someone may get a cherry deal. THis plane can have its final 40 hours flown off and become a wonderful januty plane to be enjoyed or the engine can be pulled and put into another aircraft and the body be used as a showpiece. The attractively stubbed design make this plane look fast even when hanging from your great room ceiling.

The “No Reserve” status means that the aircraft will find a new owner, regardless of the final bid amount. The Sonex N477KD being offered without a reserve ensures that the sum of its parts is genuinely greater than the whole, making it an attractive prospect for aviation enthusiasts on a budget.

Immaculate Project with Limitless Possibilities

Described as an immaculate project, the Sonex N477KD has been registered with the FAA but has not received an airworthiness certificate. This presents an exciting opportunity for a potential owner to complete the project and fulfill the necessary fly-off hours with the assistance of an A&P (Airframe and Powerplant) professional.

Beyond its potential as a fully operational aircraft, the Sonex N477KD offers versatility. The option to part out the build for individual component sales or to repurpose the airframe as a centerpiece for a restaurant, FBO, man cave, or property entrance adds to its appeal. This flexibility ensures that the Sonex N477KD is not just an aircraft; it’s a canvas for the imagination, offering limitless possibilities for customization and repurposing.

Key Features and Specifications


The airframe of the Sonex N477KD is a testament to innovation in engineering, bearing the Sonex-B model designation with serial number 1152. Its construction reflects the culmination of decades of experience and expertise in the field of light sport aviation. With a pristine 0-time status, the airframe stands as a testament to the meticulous craftsmanship and quality assurance that defines the Sonex lineage.


At the heart of the Sonex N477KD is the powerful Aerovee 80HP 4-cylinder normally aspirated engine. With a 0-time status, this engine promises exhilarating performance and reliability. Preserved in mineral oil, the engine stands ready to propel the aircraft into the skies, embodying the Sonex commitment to providing aviation enthusiasts with engines that deliver a perfect balance of power, efficiency, and longevity.


The heart of any aircraft lies in its propeller, and the Sonex N477KD boasts a Sensenich 2-blade prop with a fixed pitch. This component is not just a functional necessity; it is a carefully chosen element that complements the overall design and contributes to the aircraft’s performance. The fixed pitch design ensures simplicity and reliability, aligning with the Sonex philosophy of delivering aircraft that are not just high-tech but also robust and dependable.


The avionics suite of the Sonex N477KD is a testament to modern aviation technology. Featuring a Dynon Avionics EMS-D10 EFIS, vertical speed indicator, altimeter, airspeed indicator, trim control, throttle assembly, and dual center stick, the avionics package ensures a cutting-edge and intuitive cockpit experience. These advanced avionics not only enhance the aircraft’s performance but also contribute to a safe and efficient flying experience for the pilot.

Additional Features:

Beyond its core components, the Sonex N477KD comes equipped with a set of additional features that elevate its appeal. The inclusion of a complete set of plans provides valuable resources for the owner, offering insights into the intricacies of the aircraft’s design and construction. This thoughtful addition underlines Sonex’s commitment to empowering owners with comprehensive resources for maintenance, customization, and future enhancements.


The exterior design of the Sonex N477KD is a visual delight, showcasing a vibrant combination of red and white hues with striking black accents. This vibrant color scheme not only enhances the aircraft’s aesthetic appeal but also ensures visibility and recognition in the sky. The attention to detail in the exterior design reflects the Sonex lineage’s commitment to creating aircraft that are not only high-performing but also visually stunning.


The interior of the Sonex N477KD exudes a sleek and minimalist charm. Adorned with a black cloth seat and a bare metal finish throughout, it strikes a perfect balance between comfort and functionality. The black cloth seat not only provides a comfortable cockpit for the pilot but also adds a touch of sophistication to the overall aesthetic. The bare metal finish complements the modern design, creating an environment that is both visually appealing and functional.

Auction Details

For those eager to make the Sonex N477KD their own, the auction presents a golden opportunity. The live auction is scheduled from January 24 to January 31, 2024, providing potential buyers ample time to explore and evaluate this unique aviation gem.

The minimum bid for this remarkable project is set at $2,000, ensuring accessibility for a broad spectrum of aviation enthusiasts. A buyer’s premium of 6% adds to the transparency of the process, and a $500 deposit is required to participate in the auction. Crucially, the Sonex N477KD stands out as a “No Reserve” item, guaranteeing that this exceptional aircraft will find a new home, regardless of the final bid.


In conclusion, the Sonex N477KD is not just an aircraft; it’s a manifestation of Sonex’s commitment to innovation, performance, and accessibility in aviation. Its “No Reserve” status, combined with its immaculate condition and versatile potential uses, makes it a rare find in the aviation market. Whether you are an aspiring pilot, a collector, or someone with a passion for aviation history, the Sonex N477KD represents an opportunity to own a piece of the skies. As the auction dates draw near, the anticipation for the next steward of this exceptional project continues to soar.

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