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University of Colorado Boulder · AIAA Design/Build/Fly
Colorado DBF members carrying the competition aircraft off the flight line
University of Colorado Boulder · AIAA Design/Build/Fly

Design it. Build it. Fly it.

Colorado Design Build Fly is CU Boulder's student-run competition team. Each season we design, build and fly a new remote-controlled aircraft for the AIAA Design/Build/Fly competition, against university teams from around the world.

Countdown to the 31st fly-off · Tucson, 15 April 2027
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Sun 2pmGeneral meetings
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Who we are

A competition club. Every year there are **new rules, new requirements, a new design and a new plane.** We read the rules in August and fly the result in April.

Colorado Design Build Fly is a student-run engineering team at the University of Colorado Boulder. Each season the team designs, analyses, manufactures, tests and flies a purpose-built aircraft for AIAA Design/Build/Fly. Members come from aerospace, mechanical and plenty of other majors, first year through graduating senior, and most arrive with no RC experience at all.

Team members walking the aircraft out to the runway at competition Competition flight line
0rdBest overall finish, Wichita 2012
0Top-five finishes at the fly-off: 2008, 2012, 2013
0Subteams, each owning part of the aircraft
0New aircraft designed, built and flown every season
Built in Boulder
Elev.5,430

Designed a mile up, in the shadow of the Flatirons

Everything we build is designed, built and test-flown in Boulder, Colorado, at 5,430 feet. The air here is roughly 15 percent thinner than at sea level, so every wing has to make more lift and every propeller has to work harder. When the aircraft flies in Tucson or Wichita, it has already been proven somewhere harder.

  • CU Boulder · home of the Ann and H.J. Smead Department of Aerospace Engineering Sciences, ranked eighth in the nation for graduate aerospace engineering by U.S. News in 2026, with nineteen CU affiliates who have flown as NASA astronauts
  • Colorado · more aerospace jobs per capita than any other state, which is where a lot of our alumni end up
  • Since 2003 · CU Boulder aircraft with Buffalo names, from Water Buffalo and Buffalo Wings to H2BuffalO and Ralphie's Revenge
  • Wichita, 2012 · third place overall with H2BuffalO, the team's best finish at the AIAA fly-off
Every result since 2003
The 2012 Colorado DBF team in Wichita, Kansas, where the team placed third overallWichita, 2012 · 3rd place
The 2025 to 2026 aircraft on the runway 2025 to 2026 aircraft
The season

One aircraft. Eight months. Every stage reviewed.

Rules drop in late summer. From there it is mission analysis, a proposal, preliminary and critical design reviews, a written report, manufacturing, ground test and flight test, with results fed straight back into the next revision.

  • Late August · info meeting, foam prototype workshops, rules release
  • October · proposal due, preliminary design review
  • December to February · critical design review, build, design report
  • February to April · flight test, refine, compete
How the competition works
Partners

Backed by people who believe in student engineers

Become a partner
Strategic partner
CU Boulder · College of Engineering and Applied Science

Engineering Excellence Fund

Funded by engineering student fees, the EEF backs student projects and organizations across the college. For Colorado DBF it is the foundation of each season's budget, from airframe materials to the trip to the fly-off.

About the EEF
Strategic partner
Centennial, Colorado

Boom Supersonic

Boom is building Overture, a supersonic airliner, a short drive from campus, and its XB-1 demonstrator broke the sound barrier in January 2025. A Colorado aerospace company backing the next generation of Colorado aerospace engineers.

Visit Boom
Strategic partner
Southern California

Atlas Motion Systems

Atlas designs and builds brushless DC motors and actuators for drones and robots, engineered around each customer's program and manufactured at scale. Electric propulsion is the heart of every DBF aircraft, so having a motor company in our corner matters.

Visit Atlas Motion
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Next step

Ready to learn to fly, together?

Complete the form, come to a Sunday meeting, or reach out to a lead. New members are welcome at any point in the season.