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Boeing KC-97L Stratofreighter

North American F-86H Sabre & Boeing KC-97L Stratofreighter

DAYTON, Ohio -- The North American F-86H Sabre and the Boeing KC-97L Stratofreighter on display in the Cold War Gallery at the National Museum of the U.S. Air Force.(U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter

DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter

DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

KC-97 Aircraft

DAYTON, Ohio -- The Boeing KC-97L Stratofreighter on display in the Cold War Gallery at the National Museum of the U.S. Air Force.(U.S. Air Force photo by Ken LaRock)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
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Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
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Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 12 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Aerial refueling boom operators position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
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Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 14 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 15 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 16 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 17 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 18 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 19 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 20 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 21 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 22 of 50

Aerial refueling boom operator's position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 23 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 24 of 50

Aerial refueling boom operators position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 25 of 50

Aerial refueling boom operators position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 26 of 50

Aerial refueling boom operator's position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 27 of 50

Aerial refueling boom operator's position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 28 of 50

Aerial refueling boom operator's position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 29 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 30 of 50

Aerial refueling boom operator's position in the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 31 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 32 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 33 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 34 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 35 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 36 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 37 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 38 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force.
PHOTO DETAILS  /   DOWNLOAD HI-RES 39 of 50

Interior view of the Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter.
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

Boeing KC-97L Stratofreighter
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter on display in the Cold War Gallery of the National Museum of the U.S. Air Force. A cargo version of the B-29, The C-97 Stratofreighter first flew in 1944. Boeing introduced the tanker version KC-97 with the flying boom refueling system in 1950. (U.S. Air Force photo by Ty Greenlees)

KC-97 Aircraft
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DAYTON, Ohio -- The Boeing KC-97L Stratofreighter on display in the Cold War Gallery at the National Museum of the U.S. Air Force.(U.S. Air Force photo by Ken LaRock)

KC-97 Aircraft
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DAYTON, Ohio -- The Boeing KC-97L Stratofreighter on display in the Cold War Gallery at the National Museum of the U.S. Air Force.(U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio -- Boeing KC-97L Stratofreighter at the National Museum of the United States Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter at the National Museum of the United States Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Boeing KC-97L Stratofreighter at the National Museum of the United States Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Boeing KC-97L Stratofreighter at the National Museum of the United States Air Force. (U.S. Air Force photo)

A cargo version of the B-29, the C-97 Stratofreighter first flew in November 1944. Boeing introduced the tanker version, KC-97 with the "flying boom" refueling system, in 1950. In all, the USAF ordered 890 aircraft: 74 C-97s and 816 KC-97s. 

To keep its tankers compatible with its newer high performance jet aircraft, the USAF gradually replaced the slower KC-97s with Boeing KC-135 jet tankers after 1956. However, some modified KC-97s continued flying in other roles. In 1964 some of them received two jet engines. The increased speed of these KC-97L aircraft made them more compatible with high performance jet aircraft, and they served primarily with the Air National Guard. The USAF retired its last C/KC-97 in 1973, but others remained in use with the Air Force Reserve and Air National Guard as tankers or search and rescue aircraft.

During Operation Creek Party, which started in 1967 and lasted for 10 years, Air National Guard and Air Force Reserve tankers supported active duty USAF and NATO units in Europe. The aircraft on display, flown by the 160th Air Refueling Group of the Ohio Air National Guard, participated in this operation, and on June 7, 1973, the mayor of Zeppelinheim, a town near Rhein-Main Air Base in West Germany, christened this aircraft in his town's honor. The Zeppelinheim was flown to the museum in August 1976.

TECHNICAL NOTES: 
Engines: Four Pratt & Whitney R-4360s of 3,500 hp each and two General Electric J47 turbojets of 5,970 lbs. thrust each
Maximum speed: 400 mph
Range: 2,300 miles
Span: 141 ft. 2 in.
Length: 117 ft. 5 in. (with boom retracted)
Height: 38 ft. 4 in.
Weight: 153,000 lbs. normal maximum
Serial number: 52-2630

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