Boeing 367 / C-97
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Boeing 367 / C-97

In early 1942 Boeing initiated a design study to examine the feasibility of producing a transport version of its B-29 Superfortress. In due course the company's proposal was submitted to the USAAF for consideration and, because at that time the long-range transport was a much-needed type of aircraft, a contract for three prototypes was awarded on 23 January 1943. Identified by the company as the Boeing Model 367, and designated XC-97 by the US Army Air Force, the first made its maiden flight on 15 November 1944.

The XC-97 had much in common with the B-29, including the entire wing and engine layout. At first view the fuselage, of 'double-bubble' section, appeared to be entirely new, but in fact the lower 'bubble' was basically a B-29 structure, and so was the tail unit attached to the new (and larger) upper 'bubble'. On 6 July 1945, following brief evaluation of the prototypes, 10 service-test aircraft were ordered. These comprised six YC-97 cargo transports, three YC-97A troop carriers, and a single YC-97B with 80 airline-type seats in its main cabin.

The first production contract, on 24 March 1947, for 27 C-97A aircraft with 2425kW Pratt & Whitney R-4360-27 engines, specified accommodation for 134 troops, or the ability to carry a 24,040kg payload. Two transport versions followed, under the designation C-97C and VC-97D, and following trials with three KC-97A aircraft equipped with additional tankage and a Boeing-developed flight-refuelling boom, KC-97E flight-refuelling tankers went into production in 1951. This version was powered by 2610kW R-4360-35C engines. The KC-97F variant which followed differed only in having R-4360-59B engines. Both the KC-97E and KC-97F were convertible tanker/transports, but for full transport capability the flight-refuelling equipment had to be removed. The most numerous variant, with 592 built, was the KC-97G which had full tanker or full transport capability without any on-unit equipment change.

When production ended in 1956 a total of 888 C-97s had been built, and many were converted later for other duties. The KC-97L variant had increased power by the installation of a 2359kg thrust General Electric J47-GE-23 turbojet beneath each wing to improve rendezvous compatibility with Boeing B-47s. KC-97Gs converted to all-cargo configuration were redesignated C-97G, and in all-passenger configuration became C-97K. Search and rescue conversions were HC-97G, and three KC-97Ls went to the Spanish air force, being designated TK-1 in that service. Several have served in many roles with Israel's air force.


C-97D: designation applied to the third YC-97A, the YC-97B, and two C-97As following conversion to a standard passenger configuration; the three VC-97Ds were subsequently redesignated C-97D

KC-97H: designation applied to one KC-97F, following modification for service trials as a tanker using the probe-and-drogue flight-refuelling system developed in the UK

YC-97J: final designation of two KC-97Gs converted for USAF use as flying test-beds, each with four 4250kW (5,700-shp) Pratt & Whitney YT43-P-5 turboprop engines

Boeing 367 / C-97

 ENGINE4 x Pratt & Whitney R-4360-59B radial pistone engines, 2610kW
    Take-off weight79379 kg175002 lb
    Empty weight37421 kg82500 lb
    Wingspan43.05 m141 ft 3 in
    Length33.63 m110 ft 4 in
    Height11.66 m38 ft 3 in
    Wing area164.34 m21768.94 sq ft
    Max. speed604 km/h375 mph
    Cruise speed483 km/h300 mph
    Ceiling9200 m30200 ft
    Range6920 km4300 miles

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Ron Crooker, 23.02.2015

Crew Chief with the 384th ARS at Westover AFB, 1956 -1959 on KC-97G 53-220. Loved that plane. Spent 22 years in the AF and that experience was the most enjoyable. Worked the R-4360s on the B-36 (6th Bomb Wing), C-124, and the 4360-59B on the KC-97G. Loved that engine. Also worked the Wright R-3350-89A on the C-119 and the R-3350-34/91 on the C-121s. Also great engines. But the KC-97G was the best plane and engine combination - good power, accommodating overloading as was often the case in SAC. Dow AFB Acft Cmdr (Capt. Carroll)flew 53-220 out of Harmon during a joint Max Effort. Wrote a letter commending the Crew Chief and assistant on the condition of the plane mechanically and the cleanliness of the plane throughout. Loved old 220 - a dream plane for a Crew Chief, who flew with it more often than not. Story... while I was in a PM insp. dock at Westover, the crew chief of C-97 55956 went looking for a replacement pilot's sliding window which was cracked on his plane (a VP). I got wind of it and quickly removed my sliding window, put it in the trunk of my car, and left the base. Sure enough, that ol' crew chief came to 220 in the PM dock looking, but couldn't find his replacement window. That plane was gone when I finally came back to the base next day - put my window back in, and towed my plane out of the dock - PM completed. Didn't like other folks messing with my plane. It was during that time that Specialized Maintenance came into the system - drove me crazy - but I, and my plane, survived.

Loomas Marshall, 13.02.2015

I worked on the 97 at march afb and M almstrom afb Let me know if I can fill you in on any thing.
I am looking for any info on the 377 tail # 8411 that gen old used. At March field

Dean L Gambill Jr, 06.02.2015

In response to Jerry Clark's comments concerning my father, Dean L Gambill, NCOIC of Flight Engineers at 134th ARG Knoxville, TN. Thanks for your kind words concerning my father, Jerry. He loved his work and relished sharing what he knew about the 97 with pilots as they joined our unit.

Walter H. Polk, 24.01.2015

The KC97 , whether it was an E , F, G , or L model was a flight engineer's dream. Ask SAC's greatest FE on the 97, Charles Bos about the bird for he flew it longer than anyone else in the USAF !!!!!!! Almost a complete career. It worked a crew chief and other maintenance personnel to the bone to keep it in top shape.

Bob Archer, 30.07.2014

I am presenting below and article I wroyte for an English aviation magazine on Operation Creek Party. It was great fun researching and writing.

Operation Creek Party - The KC-97L in Europe
by Bob Archer

For eleven years, the air refuelling corridors above central Germany reverberated to distinctive rhythm of four Pratt and Whitney R-4360-59 Wasp radial engines. The aircraft flying these important training missions were Boeing KC-97L Stratofreighters, which had been given a new lease of life due to the insatiable requirements for additional KC-135 tankers to support the war effort in South East Asia (SEA). These Stratofreighters, which earlier in their careers had been designated as the KC-97G, (and affectionately abbreviated simply to "Strats") had once been the backbone of the aerial refuelling task for Strategic Air Command (SAC), until the last examples were withdrawn from active duty Squadrons at the end of 1965. The dependable, and well respected Strats began entering Air National Guard service in May 1961 for aerial refuelling tasks - with Illinois and Wisconsin being the first two ANG organisation to re-equip with the type. Initially the KC-97F was the version which joined the ANG, although their career was short lived, as surplus KC-97G models became available in appreciable numbers, enabled this latter type to begin reserve service from the latter part of 1962. Initially ANG KC-97s were flown primarily for operations within the United States, enabling additional Boeing KC-135 Stratotankers to deploy to SEA. However, the KC-97 was barely adequate to perform the refuelling task, as the Wasp engines struggled to maintain formation with the new jet bombers, such as the B-47 and B-52. Furthermore the Strat was virtually outclassed while refuelling the Century series fighters and the newer McDonnell F-4 Phantom, as all too frequently the tanker was required to transfer fuel while in a shallow descent. It has been suggested that the venerable Strat was close its maximum cruising speed, while the F-4 was close to a stall, so the descent refuelling mode offered an additional safety margin.

The possibility of ANG Stratofreighter tankers being stationed in Europe followed the successful deployment to Europe in August 1964 under Operation Ready Go of 28 ANG KC-97s refuelling 19 F-100s and 12 Republic RF-84F Thunderflashes on their trans Atlantic deployment. This was the first major intercontinental ANG operation, and reinforced the shortcomings of the KC-97. Apart from the difficulty maintaining an acceptable altitude, there was an ever present danger of a fully loaded KC-97 loosing an engine while departing a facility on a hot and humid day could have catastrophic results. An engine failure on such conditions would require the underwing tanks to be jettisoned, which was unthinkable due to the proximity of municipal airports located close to populated residential and business areas.

The solution was devised by personnel of the 108th Air Refuelling Squadron, Illinois Air National Guard at Chicago's O'Hare Airport. A team headed by aeronautical engineer Lieutenant Philip A Meyer investigated the possibility of utilising surplus General Electric J-47 jet engines taken from retired KB-50J/K Superfortresses, with installation on the hard points formerly used to mount the KC-97 underwing tanks. The J-47 engines offered an additional 5,970 lbs of thrust, which was a considerable performance boost during takeoff, and climb to altitude. Furthermore the new engines increased the tankers ceiling from 15,000/20,000 to 30,000 feet [4,572/6,096 metres to 9,144 metres]. The additional jets also enabled a modest boost of an extra 30 knots during refuelling missions, thereby improving compatibility with receivers. In addition an AN/APX-29 long range "rendezvous" radar was installed atop the fuselage in a large fairing.

Following a feasibility study, the blueprint was evaluated by Air Force Systems Command, who arranged for a contract with Hayes Aircraft Corporation at Birmingham Municipal Airport, Alabama. Hayes had considerable experience with maintenance and repair of multi-engined types, and had earlier performed a similar upgrade to the KB-50s. Paradoxically, stored KB-50s were the donors for the components necessary to improve KC-97 performance. Therefore the KC-97L upgrade was a fairly simple modification. The biggest stumbling block to the programme was funding. This situation was resolved by Tactical Air Command's commander, Gen. Walter C. Sweeney, Jr. who supported the ANG proposal due to SAC being unable to support his command's wartime air refuelling requirements. The ANG tanker force was subordinate to TAC in the event of mobilisation, and was therefore of considerable interest to General Sweeney. The prototype KC-97 modification cost $67,000 to complete, but this unit cost was reduced to $36,000 per aircraft for the remaining 55 KC-97L conversions. ...

Jerry Clark, 08.04.2014

I flew the KC-97 as pilot and copilot for the Tennessee Air Natuonal Guard at McGhee Tyson in Knixville jfrom 1971-1975. I had several hundred hours in it refueling in the US and in Europe. We along with. 5 other units ran an operation called Creek Party out of RheinMein in Frankfort, Germany and each unit had 2 weeks and then it rotated to the next unit for two weeks so that every 12 weeks we had a two week stint. We were on NATO active duty for Creek Party. We just refueled fighters and no large planes as our airspeed were too low for the larger planes. It took 14 hours flying time from Knoxville to Frankfort. We stopped going over at Goose Bay, Labrador and hit the European continent at Shannon Ireland, then to Frankfort. On the return, it would take 17 hours with stops in Keflavic, Iceland and Goose Bay to Knoxville.

We flew local missions out of Knoxville just about every day of the week. We refueled both Guard fighters and regular Air Force. We had plenty of pilots so we had pretty flexible scheduling. We hung a tag on a flight and scheduled ourselves most of the time. It was each pilots responsibility to get his requirements met for day/night refuelings, landings, instrument approaches and overwater nav time in. I actually flew about as much as many of my friends who were in the regular Air Force even thiugh I was part time. I flew most Wednesday Nd Friday nights, many Saturday and Sunday flights and participated regularly in Creek Party in Europe. We flew to Puerto Rico to Ramey Ir Force Base regularly during January and February of each year. We would land just after midnight in Friday night and get in 5 days pay for a weekend! We also brought back our limit of Bacardi rum. It was $1.89 per gallon if my memory serves me correct.

We were mostly concerned about oil use as we had more fuel than we did oil. On flights to Europe we had an extra 55 gallon barrel of oil that we could transfer to the oil used by the engines. On the walk around, it was common to have a drop of oil drip on you checking out the engines. We also had the jet engines, so we had 4 recipes and two jets. Jets could burn either jp4 or avgas. It was an oil hog!

I saw a post by Dean Gambill Jr. His dad was a Flight Engineer and the most respected one in our group. I flew with him a lot so Dean Jr., I thought a lot of your Dad and learned a lot about the airplane from him. He was a fine man.

It was one tough plane. I flew one through a hurricane on the way to Ramey one night and at the time just thought I was in a very bad class 6 thunderstorm. I had the engineer turn off the over wing lights as the wings were flexing on that plan an unbelievable amount and I didn't want to see them break off. They didn't and I thanked Boeing when I landed in Ramey for the strength they put in that plane. I was most worried about running into hail and smashing the inter coolers on the engine and loosing all 4 of them and having to fly with jets only. We were lucky and didn't run into hail, so we made it without damaging anything. We had been flying in the Bermuda Triangle and were glad to get to Ramey. We had some strange things happening with the radar on that flight and it was out when we came back to the US on Sunday so we had to island hop to Miami because it was out and got jumped by two Migs near Cuba. Just as we got to Miami and out of the Bermuda Triangel, the radar began working again. Strange flight!

Bruce R Nelson, 16.03.2014

Seeking USAF Sgt James E Davis. We flew together the last “scheduled” C-97 out of Travis as the switch to C-135s took hold. Jim, his wife and my family were off duty good friends. Traansfers led us astray with no contact....perhaps this will find his way. Thanks, Bruce R Nelson, Salem, Oregon 2064145971

Jerry Hardesty, 17.01.2014

I was disappointed when my F-84F assignment got replaced with an assignment to the 97th AREFS at Biggs AFB in Texas. Out squadron was then transferred to Malmstron AFB in Montana. It was at Malmstrom I learned to love the KC-97G I more than 5,000 hours in the '97". I flew the aircraft as a co-pilot and aircraft commander at Malmstrom and was then awarded an assignment to fly the command crew at Vanderberg AFB. From there, I went to Guam and flew and instructed on the "97" at Anderson AFB. I still regret not getting to fly the F84, but I cannot think of a greater four engine prop driven aircraft in the Air Force inventory. I can truly say I loveed every minute I flew it. It's dependability and stability made it a joy to fly. The dependability, of course, was a direct result of the dedicated mechanics and ground crew that worked theis asses off to keep them in the air. I still remember the comradeship all the crews shared, whether ground crew or flight crew. I met a lot of wonderful people while flying a wonderful ship. She will forever remain in my heart. I started flying the "97" in iSeptember 1957 and flew her through 1966.

Charles Landis, 14.01.2014

First duty assignment,1956,509th AREFS, Walker AFB, NM.. Maintenance, then changed to OMS. 58, the wing moved to Pease AFB, NH. Spent a tour at the Goose, transient alert, handled a lot of 97s going onto the alert pad. Next assignment, 376th OMS, Lockbourne AFB. OH. Assigned as asst cc on 53-136, till I went to March AFB, in 63. Got out in 64 and spent time with the CAL ANG, on 97s.
For all those, that loved the 97, my chance came, in 95. I went to work with a outfit in Corpus Christie, TX., that owned a surplus 97. Helped them pull the annual on 52-2718, and worked that airplane in AK. We hauled salmon from the outlying ports to the cannery at Kenai. You want something that will make you fill young again, try it. That plane has now been restored and is owned by the Berlin Airlift Association. She is supposed to be a flying museum. She is painted in the same colors as the XC-97, that was used during the Berlin Airlift. Believe me, I didn't know a 97 was used then. Google her tail number, for more info.
Of all the 97,s I worked on, 52-2718 and 52-2698 are the only 2 remaining flyable 97s left. My old girl friend, 52-2697, my first acft in 56, She is a static display at Grissom ARB, IN. I got the chance to go inside her a couple of years ago. Many good memories.

Jimmymcgee, 07.03.2013

At Forbes around 1955? A KC had a prop break and go into the aircraft. I THINK it was at about 20,000 feet. It had a full crew plus an evaluation crew on board. It went into a flat spin and crashed not too far from the base. Many of us were bussed out there, joined hands and searched for parts, people, etc. No one survived. Can anyone remember this?

CC Wade, 20.02.2013

Info on Lemay's C97

Ron Brink, 28.12.2012

These comments have brought back some pleasant and some not-so-pleasant memories. I was a co-pilot in the '97 from Nov. 61 to Dec 63 assigned to the 310th ARS at Schilling. As a '135 sim instructor at Altus in the late '90s I reminded my students that I went back to when tankers had propellors on them. Some didn't even know it. I told tham that SAC had a philosophy that said "if someone would build a runway around the world, SAC would buy a tanker that wouldn't be able to take off on it." I also told them that there was a plan in the late 60's to use the '97 in Viet Nam but they found out that the Russians had developed a grease seeking missile so that idea was scrapped.

Jim Webb, 15.12.2012

Hey all. I'm a former boom operator and flight engineer. I'm currently writing a book that covers all of the air refueling squadrons from 1948 to present. I'm looking for stories, photos, and scans of patches from guys who were in the units or had family in the units. I'd love to interview you over the phone if you have a chance. My number is 1-850-803-9275. I live in North Carolina. Many old crewmembers are passing away daily and we need to make their history permanent so that generations to come can read and see what they did for our country. I can send you examples from my book if you'd like. You'll be impressed.
Jim Webb

Björn, 13.11.2012

Hi at all,
i´m from Germany and build a model of the C97G during the Vietnam war. Does anyone have pictures of such planes, he can leave me only for private purposes? What build number and units are flown to and from Vietnam?
Many thanks for your help.

Lt. Col. George A. Larson, USA, 17.10.2012

I am researching a book on Dyess AFB which will include KC-97 operations. I am working with Dyess AFB Public Affairs. I am asking for inputs on those at Dyess in KC-97s. WWIIHIST@AOL.COM

Fred Dack, 13.07.2012

To misfits.Although I flew a couple of thousand hours in the KC 97 as a boomer and a radio operator I never flew the Pacific routes. I did make several trip across the Atlantic though and Newfoundland to England or The Azores was about 12 hours. I still have all my old flying time records (about 11,600 hrs.) and might be able to find a specific trip I remember to reference. I flew from Beale AFB, CA to Hickam many times in a KC 135 and it usually was a little over 5 hours.


Fred Dack, 13.07.2012

To Martin in Quebec,Sir, I have just received this network site on all the old aircraft but have only viewed a few items. I was interested in the KC 97 s as I was a Radio Operator and later a Boom Operator on 97 and then KC 135 s.
I always heard about what could be your aircraft but not sure if the dates agree. However, I attended a 135 school in 1963 with a guy who was the boomer on a KC 97 that flew out of Plattsburgh AFB, NY one winter night but not sure of the year. They had major problems and had to bail out somewhere over NY State. They left the aircraft on autopilot and they couldn’t find any wreckage for some time. Eventually they found it flew north till it ran out of gas and then made a nearly perfect landing, but even he didn’t know exactly where and never knew if they retrieved it.
In those days most of us in SAC aircraft referred to your area as “up near Goose Bay” as we all pulled some kind of duty there.
Hope this helps.
Fred Dack.

jimpojmanski, 04.06.2012

I was one of those Air Evac Medics in 56,57,58,59 and flew out of Hickman and also out of Tachikawa AFB and beside the C-97 we also flew the sick in the Navy's C-121. i remember the incident with Major Tyson flying with two engines because one of my friends had been dead heading back to hickam after delivering patients to Travis. I am trying to find out "the flying time from Travis to Hickman in the C-97 back in 1956" i can't remember..i believe it was about 12 hours and in head winds about I right? I can't remember help HELP

Barrie Dieffenbach, 01.06.2012

I was at Dover AFB in the 11th ARS Air Police from 1962 - 1964. Our KC-97's went TDY to Goose Bay, North Africa, The Azores, Spain & England while I was there. I spent 3/4 of those years out of the USA with those aircraft. Great time. They moved the 11th ARS out of Dover a few years later.

Charles Landis, 10.05.2012

Info Len Serio, KC-97G/L 52-2697, located at the Grissom Air Museum Grissom ARB, IN, was one of your old birds. She was the first G to be modified to the L version. She was also the first 97, I worked on, as an assist CC. This was in 1956, and, at that time, she was assigned to the 509th AREFS, Walker AFB NM. I got to go inside her, last summer. She has a few parts missing, but she still is a beautiful Old Lady.

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