Boeing B-17 Flying Fortress

Updated: October 2026 – First you hear it, then you see it: four radial engines with a deep, uneven drone, behind them a silver or olive-drab silhouette with a tall tail and gun turrets all around. When that happens over Duxford, it is very likely the Sally B, Europe’s last airworthy Boeing B-17 Flying Fortress. Here you’ll learn how to recognize the B-17, what versions there were and where you can still experience one flying or in a museum today.

What is the Boeing B-17 Flying Fortress?

The B-17 is a four-engine heavy bomber made of all metal, developed by Boeing in Seattle. The impetus came in the mid-1930s from a US Army Air Corps competition for a multi-engine bomber. Boeing took a big risk and built, at its own expense, a prototype with four engines instead of the usual two: the Model 299. It flew for the first time on July 28, 1935.

At its unveiling, the aircraft stood out for its many gun positions. According to the common account, a Seattle Times reporter therefore wrote of a “flying fortress” – the name stuck, and Boeing had it protected.

The start was anything but smooth. On October 30, 1935, the Model 299 crashed during a demonstration flight at Wright Field in Ohio, killing two crew members. The cause: the control gust lock had not been released. That accident gave rise to an innovation that still shapes all cockpit work today – the pilots’ written checklist. Despite the loss, the Air Corps ordered a test series, and the B-17 went into production from 1936.

By 1945, 12,731 aircraft had been built. Besides Boeing, Douglas and Lockheed-Vega also built the B-17 under license. The last main version alone, the B-17G, accounted for 8,680 aircraft.

The versions: from the slender original B-17 to the B-17G

If you want to identify the B-17 more precisely, look mainly at the tail and the nose. Development came in two big steps: with the B-17E, it got the large tail and the tail gun position, with the B-17G the chin turret.

Version	Number built	Identifying feature
Model 299 / Y1B-17	prototype and test series	small, slender vertical stabilizer, gun blisters on the fuselage
B-17C	small series	flat side windows instead of blisters, tub under the fuselage
B-17D	42	similar to the C, small tail
B-17E	512	large tail with long dorsal fin, tail gun position, top and ball turret
B-17F	3,405	large, almost frameless glass nose
B-17G	8,680	chin turret with two machine guns under the nose

The B-17C flew as the Fortress Mk I with the Royal Air Force. Its first mission in the summer of 1941 was disappointing, and the British soon passed the aircraft on to Coastal Command. The experience flowed into the B-17E, which fundamentally changed the B-17’s appearance: a much larger vertical stabilizer with a long dorsal fin and a dedicated position for the tail gunner turned the elegant prewar aircraft into the familiar wartime bomber.

The B-17F brought a large glass nose for the bombardier. Because German fighters preferred to attack the B-17 head-on, late F production runs from Douglas and then the entire B-17G got a remotely controlled chin turret under the nose. With a total of 13 machine guns, the G was the most heavily armed version. Almost all B-17s preserved today are G models.

The three features that are enough to identify it

As always, the final certainty comes from the registration or the serial number. Many B-17s carry the original military number on the tail in abbreviated form, plus a civil registration. How to read US military serial numbers is explained in the guide US military serials.

B-17, Lancaster, B-24 or B-29?

With vintage bombers, the risks of confusion are manageable – if you know where to look. The finder helps narrow it down.

The Avro Lancaster is the classic British counterpart and in the United Kingdom often meets the same spotters. The Consolidated B-24 Liberator also has a twin tail, plus a slender wing mounted high on the fuselage – today it is even rarer in airworthy condition than the B-17. The Boeing B-29 Superfortress is the much larger further development with a nosewheel and pressurized cabin. And the twin-engine North American B-25 Mitchell is ruled out simply by the number of engines.

The B-17 in World War II

In the war, the B-17 became the symbol of the American daylight bombing strategy in Europe. The Eighth Air Force flew from airfields in eastern England; its first mission with heavy bombers went against the Rouen-Sotteville marshalling yard in France in August 1942. The idea behind it: tightly staggered formations were meant to defend themselves against fighters with their many machine guns.

The calculation didn’t work out in 1943. In the raids on Schweinfurt and Regensburg, the formations lost a great many aircraft, and on “Black Thursday” in October 1943, a total of 77 B-17s were lost to shootdowns, crash landings and irreparable damage, around 60 of them over Germany. Only with long-range escort fighters like the North American P-51 Mustang did losses fall significantly from 1944. The B-17 also flew in the Pacific and the Mediterranean, but its reputation was made over Germany.

Many aircraft carried names and nose art. Best known is the B-17F “Memphis Belle,” whose crew completed 25 missions in 1943 as one of the first in Europe. Its story has been filmed twice; the original now stands restored in the National Museum of the US Air Force in Dayton.

After the war: survey aircraft, water bomber, movie star

After 1945, thousands of B-17s were scrapped. Some survived in secondary roles: as an air-sea rescue aircraft with a droppable lifeboat, as a remote-controlled target drone, with the US Navy as an early-warning aircraft under the designation PB-1W. Civilian B-17s flew as freighters, in the USA as firefighting aircraft against wildfires and in France as survey aircraft for the Institut Géographique National.

It was precisely this late career that saved many of the aircraft preserved today – including the Sally B. Later came appearances in films and TV series that brought the B-17 a new audience.

The history also includes tragic accidents of more recent times. In October 2019, a Collings Foundation B-17G crashed during sightseeing flights at Bradley Airport in Connecticut, killing seven people. In November 2022, the B-17G “Texas Raiders” was lost in a collision during an air show in Dallas. Both accidents further reduced the number of airworthy B-17s.

Sally B: Europe’s last flying B-17

The Sally B is a B-17G with serial number 44-85784. It was handed over to the US Air Force in June 1945 – too late for combat missions. After a few years in military service, the French Institut Géographique National bought it in 1954 and used it as a survey aircraft. In 1975 it came to England, received the registration G-BEDF and was restored to wartime condition.

The operator is the non-profit B-17 Preservation, led by Elly Sallingboe. The Sally B is not part of the museum’s collection but is permanently based at IWM Duxford. Maintenance and operation depend on volunteers and donations. A fixed ritual is the flypast after the memorial service at the Madingley American cemetery near Cambridge on Memorial Day.

One detail for photographers: since the filming of “Memphis Belle,” one side of the fuselage still carries the Memphis Belle paint. So depending on the side, you photograph two different aircraft names.

Location	What you see	Chance of a hit
IWM Duxford	Sally B on static display or in flight, plus a static B-17G in the American Air Museum	high for the static aircraft, flight depending on the program
Airshows in the United Kingdom	Sally B in the display	depends on the season’s program
Continental Europe	occasional Sally B appearances	low

How to plan the flying days at Duxford is covered in the article IWM Duxford airshows. The spot page IWM Duxford describes the site itself.

Airworthy B-17s in the USA

The remaining airworthy B-17s are in the USA, operated by associations, foundations and private collections. Well known are, for example, the “Sentimental Journey” of the Commemorative Air Force in Arizona and the “Aluminum Overcast” of the Experimental Aircraft Association. Depending on the source and cutoff date, inventory lists count only three to four airworthy aircraft worldwide. Which of them is flying at any moment changes with maintenance and restorations – don’t rely on older lists.

B-17 in a museum: the key addresses

Around 45 more or less complete B-17s survive worldwide, most of them in the USA. According to the common inventory lists, there is none in Germany. These museums show a B-17, according to inventory lists:

• IWM Duxford: a static B-17G in the American Air Museum, plus the airworthy Sally B.
• RAF Museum London: a B-17G in the exhibition.
• National Museum of the US Air Force, Dayton: the restored “Memphis Belle”; described as a spot under Dayton.
• Museum of Flight Seattle: a B-17F right at Boeing Field, the B-17’s home – more on the spot under Museum of Flight at Boeing Field.
• Pima Air & Space Museum Tucson: a B-17G in the affiliated memorial museum of the 390th Bomb Group.

Exhibitions get rebuilt, aircraft restored or loaned out. Check before your visit whether the aircraft is currently on display. You can gauge how rare your sighting is with Estimating the rarity of a sighting – a flying B-17 is among the rarest subjects of all in Europe.

Photo tips specifically for the B-17

The B-17 is one of the most photogenic aircraft of all: long wings, lots of details and nose art with a story. A few points make the difference.

When the light is right, you calculate in advance with the guide Planning sun position for your photo spot. For airshow day, Photographing airshows and the overview Airshows in Europe help you. A broader introduction to identifying old types is provided by Recognizing vintage aircraft in the sky.

Common mix-ups and how to rule them out

Conclusion

The B-17 Flying Fortress is more than an old bomber: it stands for the rise of Boeing, for the introduction of the pilot checklist and for one of the hardest chapters of the air war over Europe. Four radial engines, the tall single tail and the tailwheel make it unmistakable, and the chin turret gives away the G version. In Europe you can experience it flying only with luck and good planning at Duxford – in museums, at several major addresses in the United Kingdom and the USA.