2026 NABC · World Champions
The Diggeridoos at Virginia Tech

We're Virginia Tech students who design and build autonomous tunnel boring machines that dig faster, straighter, and cheaper — and we just won the world title.

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By the numbers

Engineered to win

The headline specs behind a championship machine — we're very "boring."

10.9ft

Total Dug

Our leading bore length

160,000 lbs

Peak Force

Puts a Boeing 737 to shame

10 RPM

Max Cutterhead RPM

Drive-motor output speed

24 in

Bore Diameter

Finished tunnel diameter

Our Mission

Reinventing how the world moves underground

The Diggeridoos are developing a revolutionary way of reinventing travel infrastructure through the design, analysis, and manufacturing of an innovative micro tunneling machine.

Tunneling machines have hit a stagnation point in their development over the years. We set out to revitalize innovation in the industry by making micro tunneling faster, cheaper, and more efficient.

The Machine

A tunnel boring machine, reimagined by students

Every subsystem — mechanical, electrical, software, and autonomy — is designed, fabricated, and tested in-house. The result is a compact TBM that punches far above its weight class.

See the full breakdown

Custom Cutterhead

A purpose-built cutting face and thrust assembly engineered to chew through Virginia & Texas clay.

High-Density Power

A compact electrical system delivers sustained torque without overheating downhole.

Real-Time Telemetry

Our control GUI streams every sensor live so operators steer with confidence.

Autonomous Guidance

Path-correction algorithms and a powerful stewart platform keep the bore dead straight, automatically.

Gallery

See it in motion

The team, the machine, and competition day.

Flashy Tunnel Segment
Flashy Tunnel Segment
Launch Structure Close-Up
Launch Structure Close-Up
Teamwork Makes the Dig Work
Teamwork Makes the Dig Work
Loading in the Segments
Loading in the Segments
Happy Bill
Happy Bill
"Why aren't we mining yet?"
"Why aren't we mining yet?"

Methodology

How we build a champion

A disciplined, review-driven process takes the machine from a blank page to the winner's circle.

01

Research & Requirements

We study the competition rules, the geology, and last year's lessons to set hard requirements before a single part is drawn.

02

Design & Review

Every subsystem iteration is thoroughly analyzed and simulated, then reviewed by fellow team members and industry mentors in formal design reviews.

03

Fabrication

We weld, CAD model, wire, and program the machine our team-managed lab — owning the manufacturing process end to end.

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Sponsor the dig

Back a world champion team. Every dollar goes into the machine — and the engineers building it.

Tiers from $500 · Packet available