When building an experimental aircraft, structural integrity is everything. At the EAA AirVenture TIG Welding Workshop, future aviators and custom fabricators get direct, hands-on experience using industry-standard equipment under the guidance of Lincoln Electric’s seasoned professionals. Central to these interactive training booths is the Lincoln Electric Square Wave® 205 (Model K5613-1)—a high-performance AC/DC TIG and Stick welder engineered specifically to turn complex metal fabrication into a confident, repeatable process.
"Whether joining 4130 chromoly airframe tubing or laying clean aluminum beads, the Square Wave 205 bridges the gap between commercial-grade power and home workshop accessibility."
The Square Wave® 205 packs dynamic AC/DC welding capabilities into a portable 36 lb package. Its intuitive digital display and automated parameter setup allow students in the AirVenture workshop to jump straight into learning proper torch angle, heat control, and wire delivery without getting bogged down in complex menus.
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│ LINCOLN SQUARE WAVE® 205 │
│ (Model K5613-1 Highlights) │
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│ Key Aircraft Applications │ 4130 Chromoly Tubing, Aluminum Sheet │
│ Arc Control Technologies │ AC Frequency Control & AC Balance │
│ Input Voltage Flexibility │ Dual 120V / 230V Capability │
│ Portability Weight │ 36 lbs (16 kg) │
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Tailored for Aluminum & Alloy Flight Projects: Featuring adjustable AC Frequency Control and AC Balance, the machine lets builders fine-tune bead width, penetration, and oxide cleaning action—essential for pristine aluminum assemblies.
Pulse DC TIG Control: Fine-tune pulse settings to manage heat input on delicate steel tubing, preventing burn-through on thin-wall 4130 chromoly joints.
Plug-and-Play Power: Equipped with 120V/230V dual input voltage, the welder runs efficiently on standard workshop power outlets or high-output shop lines.
Multi-Process Versatility: Seamlessly transitions to stick welding when outdoor maintenance or thicker steel fabrication demands it.
Under the step-by-step instruction of Lincoln Electric’s master welders during EAA AirVenture, you'll put the K5613-1 through its paces—practicing T-joints, lap welds, and tubing splices. You won't just leave with a theoretical understanding of TIG welding; you'll gain the muscle memory, machine mastery, and personal confidence needed to start building or repairing your own aircraft project at home.