Acorn Welding

Acorn Welding is an aircraft exhaust and engine mount manufacturer and repair company in Edmonton, Alberta, Canada, and part of Hartzell Aviation within Signia Aerospace. The business began in the early 1970s in a 400 square foot hangar room as Aviation and Welding Technical Services, was bought by Frank Johnson in 1979 and renamed Acorn Welding, and has been owned since 1987 by Don Hrabec, its president. The site describes it as Canada's largest aircraft exhaust and engine mount repair company and, after buying Radial Exhaust of West Virginia in 2006, the largest radial and vintage aircraft exhaust company in the world. Between 1999 and 2009 it recorded 30,353 component repairs and 212,206 manufactured general aviation parts.

Products and services

• Aircraft exhaust systems: new and overhauled parts for Cessna, Piper, Beechcraft, Cirrus and more than 50 other manufacturers covering over 270 models, according to the site
• Engine mounts, new and repaired
• Airboxes
• Float kits and float kit parts
• Radial and vintage aircraft exhaust manufacture and repair
• Product design and MRO services, including repair schemes for specific part numbers
• Welding and fabrication of tubular structures, brackets, braces, struts and riveted assemblies
• An online store with worldwide shipping

Acorn works alongside Aerospace Welding Minneapolis (AWI) under the Hartzell Aviation exhaust and custom fabrication banner, and Hartzell Aviation also sells Acorn exhaust products through its own site. Pricing is by quote or through the online catalogue. The site has a products catalogue, a store with customer accounts and wishlists, shipping request and feedback forms, and a blog, and the company's president has owned it for almost four decades.

Contact

Description from the company's website (October 2026). Is this your company? Claim this page to add photos and keep your details up to date.