The National Museum of World War II Aviation will raise hell over Colorado Springs on Thursday morning as part of a historic flight of three World War II-era airplanes.

The flight features three SB2C Helldivers, the only airworthy examples of the dive bomber anywhere in the world. It’s being billed as a “once-in-a-lifetime” event by the museum, owing to the rarity of surviving Helldivers.

The flight will feature the museum’s Helldiver, one from Fagen Fighters World War II Museum in Minnesota and a third from the Commemorative Air Force.

“It’s pretty monumental. To get all three of these guys in the same spot at the same time is really, really tough,” said Scott Klaers, who will be piloting the B-25 “In the Mood” with his dad and museum president Bill Klaers. “To add an event of this size a month before was kind of daunting, but it’s the only time that these airplanes have been together.”

Space was tight Saturday morning when the museum housed all three Helldivers and hosted a historic presentation on fighting the Luftwaffe, Germany’s air force in World War II. The museum and its staff and volunteers are well equipped to handle tight spaces, however, as it’s what Klaers called a “moving museum.”

Every single plane in the museum can, and frequently will, fly. The museum hosts historic presentations about events during World War II, usually featuring a flight from a plane connected with that specific event.

The SB2C housed at the museum was the subject of a presentation called “Zero to Hero” last year. It coincided with the first public flight of the Helldiver, which had been under restoration for more than 40 years, The Gazette previously reported.

After Saturday’s event, the three Helldivers were parked in the WestPac hangar, which is also where restoration happens, alongside a TBM Avenger torpedo bomber and a B-25 bomber. None of these aircraft are small, but Klaers had two tricks to play to fit them in the space, he said.

“I played a lot of Tetris as a kid, so we can really fill space if we need to,” he said, adding they try to make the hangar as accommodating as possible for tours. “It also helps that they’re Navy bombers, so we can fold the wings on them.”

In total, more than 7,000 Helldivers were built. The planes flew for the U.S. Navy during World War II and were partially credited with sinking the Japanese battleships Yamato and Musashi, the largest battleships ever built. The plane’s development was not smooth, however and it earned a reputation for being tough to fly.

These days, only the three aircraft at the museum are airworthy. Several are on display, and one more Helldiver at the Yanks Air Museum in Chino, California, is being restored to airworthiness.

As for Thursday’s flight, Klaers said people should be very flexible. The flight is weather-dependent as is the type of flying the Helldivers will do, he said. The National Weather Service forecast shows a 30% chance for showers and thunderstorms in the afternoon, with a high near 91.

The museum’s doors will open at 5:30 a.m. and will remain open till the sun goes down.

“We want to give everybody an opportunity to get out here and see these things all together,” he said. “It’s a once-in-a-lifetime thing.”

Cost of entry is the regular rate to get into the museum. Purchasing online, an adult ticket is $17, tickets for kids 4-12 are $13, seniors and military are $15 and World War II veterans receive free admission.

The Commemorative Air Force is offering 20-minute rides in its Helldiver on Saturday. The price is $1,395, according to the CAF webpage.