Doc, the B-29 Superfortress, and the Wichita Volunteers Who Brought the Second Flying Superfortress Home from the California Desert

Doc, a Boeing B-29 Superfortress built in Wichita, Kansas in 1945, flew again on July 17, 2016 - 71 years after rolling off the assembly line. The flight was the result of a 29-year volunteer effort led by the Kansas nonprofit Doc’s Friends. Today, Doc is one of only two airworthy B-29 Superfortresses left in the world.

The B-29 Superfortress: Most Advanced Bomber of Its Era

The B-29 was not simply a bigger bomber. It was the most technologically ambitious production aircraft ever attempted at the time Boeing engineers began designing it in the early 1940s. The requirements pushed well beyond anything previously built.

Pressurized crew compartments connected by a crawl tunnel over the bomb bays. Remote-controlled gun turrets managed by a central fire control computer, so gunners didn’t need to sit physically at their stations. Four Wright R-3350 Duplex Cyclone radial engines producing roughly 2,200 horsepower each. A wingspan of 141 feet and a gross weight that could reach 135,000 pounds fully loaded.

The B-17 Flying Fortress - the iconic American heavy bomber - carried roughly half the bomb load and had roughly half the range of the B-29. This was a generational leap, designed with slide rules and pencils at a drawing board while the war was already burning.

The Engine Problem That Killed Crews Before Combat

All that capability came with a serious, documented flaw. The Wright R-3350 engines ran hot. The front cylinders in particular had a tendency to overheat, and when they did, the consequences were severe - nacelle fires that left crews with few options. The Army Air Forces was losing B-29s and their crews to mechanical failure on training flights, before the Japanese ever had a shot at them.

Ground crews developed rituals around those engines: careful runups, constant monitoring of cylinder head temperatures, a level of vigilance reserved for something that had already proven it would kill you if you let your guard down. The B-29 demanded expertise from everyone who touched it.

Consider what it meant to fly one operationally. A crew of 11 - pilot, copilot, bombardier, navigator, flight engineer, radio operator, and five gunners - sat inside a pressurized aluminum tube at 30,000 feet, breathing canned air over the Pacific. Round trips to Japan from the Marianas ran roughly 15 hours. The engines had a known tendency to catch fire. When the mission was done, they went back and did it again.

How B-29s Won the Pacific War

Under General Curtis LeMay, American strategy shifted from high-altitude daylight precision bombing to low-altitude night incendiary raids on Japanese cities. B-29s were stripped of most defensive armament to carry heavier loads of fire bombs, flying at night, low, over cities built largely of wood. Tokyo, Osaka, and Nagoya were reduced to ash.

On August 6, 1945, Enola Gay dropped a single atomic weapon on Hiroshima. Three days later, on August 9, 1945, Bockscar put a second one on Nagasaki. Both were B-29s built in Wichita, Kansas. The war ended.

The Army Air Forces suddenly held nearly 4,000 B-29s and nowhere meaningful to put them.

Doc’s Decades in the Mojave Desert

Doc was built at Boeing’s Wichita plant in 1945. After the war, she moved through the postwar drawdown - transferred, reclassified, repurposed - until she came to rest at China Lake Naval Air Weapons Station in the California desert.

China Lake is not a retirement home for aircraft. It is a place where things get tested and sometimes destroyed. Doc sat there for decades, through the 1950s, 1960s, and 1970s, through the entire transition from propeller aviation to jets, through Vietnam and the moon landing. The Mojave preserved her in its dry, brutal way - no moisture to accelerate corrosion, no vegetation working through the control surfaces and skins. Just time, heat, and sun.

In the late 1980s, a Kansas aviation enthusiast named Tony Mazzolini saw photographs of Doc and recognized what was sitting in that desert. Not a range target. Not scrap metal. A restorable airplane - possibly even a flyable one, with enough work and enough people and enough years.

He started making calls.

The 29-Year Volunteer Restoration

What followed was years of bureaucratic navigation - forms, unanswered queries, transfers of authority - before Doc was finally acquired and returned to Wichita, back to the Air Capital of the World where she was built.

The nonprofit Doc’s Friends coalesced around the project. It was not a well-funded institution with professional staff. It was retired mechanics, machinists who could fabricate parts that no longer existed in any catalog, and aviation enthusiasts willing to learn and show up on weekends for years, going home with grease on their hands and a quiet satisfaction difficult to explain to anyone who hasn’t felt it.

The R-3350 engines presented the greatest challenge. These engines haven’t been in production for decades. Usable cores are finite and get scarcer every year as other restorations draw from the same shrinking pool. Finding acceptable cylinders, locating propellers in usable condition, tracking down machinists who understood what these engines sound like when running right - that knowledge lives in a small and aging population. Some of it was volunteered. Some had to be reconstructed from maintenance manuals and the memories of those who still remembered.

The volunteers worked through it, year after year, in a city that has been building airplanes since the 1920s and still knows what that work requires.

Doc Flies Again: July 17, 2016

On July 17, 2016, 71 years after rolling off the Boeing assembly line in Wichita, Doc lifted off from that same city under her own power and climbed into the Kansas sky.

Tony Mazzolini was there. The volunteers who had given years of their lives to the project were there. And men and women who had actually built B-29s in Wichita during the war - who had laid aluminum panels on airframes just like this one when the work mattered in a way that was immediate and undeniable - were there too.

The sound of four Wright R-3350 Duplex Cyclone engines at full power - 18 cylinders each, four engines - is not something you forget. It builds from a low, rough rumble into something felt in the chest as much as heard by the ears. The propeller era at its absolute apex. The 1940s at full throttle, reclaimed from the desert and returned to the air.

Why Doc’s Restoration Matters for Pilots and Aviation History

Doc is now one of two airworthy B-29 Superfortresses in the world. The other is FIFI, operated by the Commemorative Air Force. Two survivors out of nearly 4,000 built.

Both fly at airshows. Both carry veterans, civilians, and pilots who want to understand in their bones what this aircraft was. And both do something no static museum display can fully accomplish: they make the sound, they move through the air, they demonstrate that this was a real aircraft flown by real people into real danger over a real ocean.

If you get the chance to see Doc at an airshow, stand on the ramp when she taxis out. Let those engines speak before you reach for the earplugs. If rides are available, seriously consider it. There is no substitute for watching the ground fall away under four spinning propellers and understanding, at a level a book cannot provide, what it meant to build and fly this airplane.

Doc’s Friends is based in Wichita, Kansas, where Doc is maintained. It is worth the trip if you’re ever in that part of the country.

Key Takeaways

Doc is a 1945 Boeing B-29 Superfortress built in Wichita and one of only two airworthy B-29s remaining worldwide, alongside FIFI of the Commemorative Air Force.
The B-29 represented the peak of World War II aviation technology - pressurized fuselage, computer-controlled remote gun turrets, four 2,200-hp engines - capable of more than twice the bomb load and range of the B-17.
The Wright R-3350 engine’s tendency to overheat and catch fire killed American crews on training flights; operating these aircraft required constant, expert attention from every person who touched them.
Tony Mazzolini identified Doc at China Lake in the late 1980s; the Doc’s Friends nonprofit completed the restoration over 29 years using volunteer mechanics, machinists, and fabricators.
Doc returned to flight on July 17, 2016, 71 years after her assembly, witnessed by the very people who built and flew B-29s during World War II.