Boeing C-97 Stratofreighter

Design began in 1942. The C-97 Stratofreighter was developed towards the end of World War II by fitting a second lobe on top of the fuselage and wings of the B-29 Superfortress with the tail, wing, and engine layout being nearly identical. The XC-97 and YC-97 can be distinguished from the Boeing 377 Stratocruiser and later C-97s by the shorter fin, and later ones by the flying boom and jet engines on the tanker models. The prototype XC-97 was powered by the same Wright R-3350 engines as used in the B-29. The XC-97 took off for its first flight on November 9, 1944, just after the death of Boeing president Philip G. Johnson. On 9 January 1945, the first prototype, piloted by Major Curtin L. Reinhardt, flew from Seattle to Washington, D.C. in 6 hours 4 minutes, an average speed of with of cargo. The tenth and all subsequent aircraft were fitted with the Pratt & Whitney Wasp Major engines and taller fin and rudder of the B-50 Superfortress. == Operational history ==

The C-97 entered service in 1947, during a period of rapid development of heavy transport aircraft. Only 77 were built before the Douglas C-124 Globemaster II was delivered in 1950, with nearly twice the payload capacity of the C-97. The USAF Strategic Air Command operated C-97 Stratofreighters from 1949 to 1978. Early in its service life, it served as an airborne alternative SAC command post. 77 C-97 transports were built. 811 were built as KC-97 Stratofreighters for inflight refueling. The KC-97 began to be phased out with the introduction of the Boeing KC-135 Stratotanker in 1957. Many KC-97s were later refitted as C-97G transports and equipped several squadrons of the U.S. Air National Guard. One YC-97A (45–59595) was used in the Berlin Airlift during April 1949, operating for the 1st Strategic Support Squadron. It suffered a landing gear accident at Gatow and by the time it was repaired, the Soviet Blockade was lifted. C-97s evacuated casualties during the Korean War. In the late 1960s, C-97s participated in the Biafran airlift, delivering relief materials to Uli airstrip in Biafra during the Nigerian Civil War. Flying under the cover of darkness and at treetop level to evade radar, at least two C-97s were lost. Air National Guard in 1971 after service as part of Military Airlift Command One C-97 is airworthy at the present day, (S/N 52-2718, named "Angel of Deliverance") operated by the Berlin Airlift Historical Foundation. It is painted as YC-97A 45–59595, the only C-97 to participate in the Berlin Airlift. The Israelis turned to Stratocruisers and KC-97s when they could not buy the preferred C-130. They adapted Boeing 377 Stratocruiser airliners into transports, including many using C-97 tail sections including the loading ramps. Others were adapted with swiveling tails and refueling pods. ==Variants==

;XC-97: Military designation of the prototype Boeing 367, three built. First prototype was designated Model 367-1-1 by Boeing, while the second and third were designated Model 367-1-2. ;YC-97: Company designation Model 367-5-5. ;C-97C: Company designation Model 367-4-29. ;VC-97D: Staff transport and flying command post conversions, three C-97As converted. ;KC-97E: Company designation Model 367-4-29. ;C-97K: 27 KC-97Gs converted to troop transports. ;KC-97L: 81 KC-97Gs modified with two J47 turbojet engines on underwing pylons. ==Operators==

Military operators ; • Israeli Air Force ; • Spanish Air Force ; • United States Air Force U.S. Air Force units The following Air Force wing organizations flew the various C-97 models at some time during their existence: Air National Guard • 105th Aeromedical Transport Group – Westchester County Airport, New York (1962–1969) • 137th Air Transport Squadron • 106th Air Transport Group – Suffolk County Airport, New York • 102d Air Transport Squadron • 109th Air Transport Group – Schenectady Airport, New York • 139th Air Transport Squadron • 111th Air Transport Group – NAS Willow Grove, Pennsylvania • 103d Air Transport Squadron • 116th Air Transport Group – Dobbins ARB, Georgia • 128th Air Transport Squadron (Heavy) • 118th Air Transport Group – Berry Field Air National Guard Base / Nashville International Airport, Tennessee • 105th Air Transport Squadron • 126th Air Refueling Wing – O'Hare Airport, Illinois • 108th Air Refueling Squadron • 128th Air Refueling Wing – Gen. Mitchell Airport, Wisconsin • 126th Air Refueling Squadron • 133d Air Transport Wing – Minneapolis-St Paul International Airport, Minnesota • 109th Air Transport Squadron (Heavy) • 137th Air Transport Group – Will Rogers World Airport, Oklahoma • 185th Air Transport Squadron • 138th Air Transport Group – Tulsa Air National Guard Base / Tulsa International Airport, Oklahoma • 125th Air Transport Squadron • 139th Air Transport Group – Rosecrans Air National Guard Base, Missouri • 180th Air Transport Squadron (Heavy) • 146th Air Transport Wing – Van Nuys Air National Guard Base / Van Nuys Airport, California • 115th Air Transport Squadron (Heavy) • 195th Air Transport Squadron (Heavy) • 151st Air Transport Wing – Salt Lake City Air National Guard Base / Salt Lake City International Airport, Utah • 191st Air Transport Squadron (Heavy) • 157th Air Transport Group – Grenier AFB, New Hampshire(1960–1964)/ Pease AFB, New Hampshire (1964–1968) • 133d Air Transport Squadron (Heavy) • 161st Air Transport Group – Sky Harbor International Airport, Arizona (1966–1972) • 197th Air Transport Squadron • 162d Air Transport Wing -, Arizona • 164th Air Transport Group – Memphis Air National Guard Base / Memphis International Airport, Tennessee • 155th Air Transport Squadron (Heavy) • 165th Air Transport Group – Savannah Air National Guard Base / Savannah International Airport, Georgia • 158th Air Transport Squadron (Heavy) • 166th Air Transport Group – New Castle Air National Guard Base / Greater Wilmington Airport, Delaware • 142d Air Transport Squadron , California, 1973 Civil operators • Balair • Berlin Airlift Historical Foundation • Foundation for Airborne Relief (USA) • Hawkins & Powers Aviation • Zantop Air Transport ==Accidents and incidents==

;22 May 1947: USAAF XC-97 43-27472 crashed in a wheat field near Wright-Patterson Air Force Base and caught fire, killing five of seven crew on board. ;6 June 1951: USAF C-97A 48-0398 crashed near Kelly Air Force Base due to a possible asymmetric flap extension on takeoff, killing all nine crew on board. ;15 October 1951: After taking off from Lajes Field, Azores, USAF C-97A 49-2602 of the Military Air Transport Service went missing on a flight from Lajes AFB (LFB), Azores to Westover Air Force Base, Massachusetts. The aircraft was piloted by Captain John Francis Dailey Jr. and had a crew of 11. A total of 50 aircraft and ships searched the intended route but no trace of the aircraft or crew was ever found. ;22 October 1951: USAF C-97A 48-0413 crashed and burned next to a runway at Kelly AFB, killing four of six on board. ;22 March 1957: USAF C-97C 50-0702 en route to Tokyo went missing over the Pacific Ocean, with 10 crew and 57 passengers on board. It is the deadliest incident ever involving the C-97. ;8 August 1957: USAF C-97 en route to Hawaii from US. No.1 engine lost its propeller and damaged No.2 engine. Aircraft flew for 5 hours at 150 ft altitude to land at Hilo. ;19 January 1958: USAF C-97A 49-2597 en route to Kwajalein from Honolulu went missing over the Pacific Ocean with seven crew on board. The U.S. Navy confirmed that debris found 277 miles to the southwest of Honolulu, was wreckage of the plane. ;29 June 1964: USAF HC-97G 52-2773, along with USAF HC-54D 42-72590, were performing pararescue training and photography missions for the NASA Gemini program when the HC-54 banked to the right, colliding with the HC-97 and shearing off the wing and tail section. Both aircraft crashed in the water off Bermuda, killing 17 on board both aircraft. Seven survived after they jumped before the aircraft collided. The cause was probably incapacitation of the HC-54 pilot. ;26 September 1969: A Nordchurchaid C-97G, (N52676), struck trees and crashed while on final approach to Uli Airstrip, killing all five on board. ;30 July 1987: After taking off, a C-97G (HI-481) operated by Belize Air International, a cargo airline, crashed onto the Mexico City-Toluca highway after the cargo shifted, killing 5 of 12 on board and 44 on the ground. ==Surviving aircraft==

C-97G 53-0272 at the Milestones of Flight Museum, Fox Field, Lancaster, California, 2007. Israel ;On display • C-97K 035/4X-FPO – Israeli Air Force Museum, Hatzerim Airbase, Beersheba, Israel. United States ;Airworthy ;;C-97G (converted from KC-97G) • 52-2718 "Angel of Deliverance" – Berlin Airlift Historical Foundation of Farmingdale, New Jersey. It is painted as YC-97A 45-59595. ;On display ;;C-97G (all converted from KC-97G) • 52-2626 – Pima Air & Space Museum, adjacent to Davis–Monthan Air Force Base in Tucson, Arizona. • 52-2764 – Don Q Inn, next to the (now closed) Dodgeville Municipal Airport outside Dodgeville, Wisconsin. It was used for filming commercials. • 53-218 – Minnesota Air Guard Museum on the north side of the Minneapolis–Saint Paul International Airport in Minneapolis, Minnesota. It has been there since November 2003. ==Specifications (C-97)==