Thunder Over Michigan at Willow Run and the warbird runway where they built B-twenty-fours by the thousands

Thunder Over Michigan at Willow Run Airport in Ypsilanti, Michigan is more than an air show — it is a direct encounter with one of the most significant aviation production sites in history. During World War II, Ford Motor Company built nearly 9,000 B-24 Liberators at the adjacent Willow Run bomber plant, completing one aircraft every 63 minutes at peak production. Today, warbirds fly over the same runways where those bombers made their test flights, and the experience is unlike anything else on the air show calendar.

Where B-24 Liberators Were Built Every Hour

During World War II, Ford converted its massive Willow Run manufacturing plant into the largest bomber factory the world had ever seen. The building stretched over a mile long — so large it reportedly had its own weather patterns inside. Ford applied the same assembly line principles that built the Model T to a four-engine heavy bomber, breaking the B-24 down into subassemblies: wings in one section, fuselage in another, tail section elsewhere, everything moving on rolling jigs down the line.

At the end, a complete airplane rolled out the door, got its engines run up, and taxied to the flight line for testing. The aviation industry initially thought Ford was out of its mind — “you cannot build an airplane like you build a car.” Ford did it anyway, and the approach changed manufacturing forever.

The original taxiway connectors from the factory floor to the flight line are still visible. Some of the original pavement remains underfoot. Volunteers at the Yankee Air Museum say visitors routinely kneel down to touch the concrete. It is that kind of place.

The People Who Keep Willow Run’s Story Alive

The human connections at Thunder Over Michigan run deep. Retired Ford engineers whose fathers worked the Willow Run assembly line volunteer alongside the museum staff. The wartime workforce included hundreds of women — Rosie the Riveter was not a myth at Willow Run. She was a neighbor, an aunt, a co-worker on the production floor building the airplane that helped win the war.

Former assembly line workers never flew in a B-24, but every time a finished bomber lifted off on a test flight, the whole production line would pause to watch through the factory windows. Even after they had built thousands.

That same emotional weight carries into the present. Visitors arrive carrying grandfathers’ flight logs in ziplock bags. Veterans salute from lawn chairs as the B-24 makes its pass. Children who do not fully understand the history feel it anyway.

What the Flying Looks Like

The aerial demonstrations blend modern military power with living history. A warbird formation led by a B-25 Mitchell with P-51 Mustangs on each wing and a P-40 Warhawk bringing up the rear delivers a wall of sound from Merlin and Allison engines that hits your chest before your brain registers the sight.

The F-16 Viper demonstration team tears the sky open with afterburner climbs and high-alpha passes that look like the jet has stopped in midair on nothing but thrust and attitude. Five minutes later, a 1943 Stearman biplane putters down the runway at sixty knots, trailing a puff of oil smoke, and the crowd cheers just as loud. This audience understands that speed is impressive, but history is sacred.

The emotional peak comes late in the afternoon: the B-24 Liberator makes a single low pass down the runway. Thousands of people go silent. Four Pratt & Whitney R-1830 radials thunder overhead. That airplane was born on this ground, and it came home.

The Yankee Air Museum and the Bomber Plant Preservation

The Yankee Air Museum is the organizing force behind Thunder Over Michigan. The museum runs the show, maintains aircraft, and is leading a major effort to preserve what remains of the original Willow Run bomber plant. A section of the factory was saved from demolition and is being converted into a permanent exhibit.

Visitors can walk through part of the original structure now. The scale is staggering — a cavernous industrial space with original support columns and overhead crane rails, where you try to imagine partially assembled bombers stretching to the vanishing point. Museum docents walk visitors through the production flow, explaining how Ford’s assembly line genius was adapted to heavy bomber manufacturing.

The museum’s restoration team maintains warbirds to exacting standards. Volunteer mechanics hand-form aluminum cowling panels to match original specs on aircraft like the museum’s TBM Avenger with its Pratt & Whitney R-2800 radial engine. The detail work reflects devotion, not obligation.

Flying In: What GA Pilots Need to Know

Thunder Over Michigan draws general aviation fly-ins from across the Midwest. Willow Run offers Runways 23L and 23R, both over 7,000 feet, providing plenty of room for everything from Cessna 172s to homebuilts. Pilots park on the grass along the east side of the field.

The FAA establishes a Temporary Flight Restriction (TFR) during the show. Check NOTAMs and plan accordingly. The Yankee Air Museum website publishes details on parking, camping, and volunteer opportunities.

Key Takeaways

• Thunder Over Michigan takes place at Willow Run Airport, where Ford built nearly 9,000 B-24 Liberators during WWII at a rate of one every 63 minutes
• The show combines world-class warbird and military jet demonstrations with unmatched historical significance — the aircraft fly over the same runways where finished bombers once made test flights
• The Yankee Air Museum is preserving a section of the original bomber plant, now open for walkthroughs, and runs the entire event with dedicated volunteers and restoration crews
• GA pilots can fly in on two 7,000+ foot runways, but must check NOTAMs for the active TFR during the show
• The experience connects visitors viscerally to WWII aviation history in a way no other air show replicates