t happened every Monday through Friday at pre­cisely 5:00 PM at United’s new terminals at both Chicago’s O’Hare and New York’s Idlewild Airport: Marching in single file to board the rear stairs of the sleek French twinjet SE 210 Caravelle VI-R was a conga line of nattily dressed businessmen carrying leather briefcases and wearing gray flannel suits with white button-down shirts and skinny black ties. It was the beginning of the hip 1960s and the dawning Kennedy era of America’s greatness, and what better way to show the world what this country was all about than having airline service for men only!

Yes, as unique and politically incorrect as that may seem today, United’s famous “Men Only” ser­vice was perceived as a special perk for successful businessmen heading off to, or returning home from, important business meetings in a time before women CEOs, astronauts, and race car drivers, as well as video conferencing. In another seemingly astonish­ing move, cigars were not only permitted on those flights, but were provided to passengers by the stew­ardesses themselves —the only two women aboard the aircraft. With its four-abreast seating and large triangular windows, the 64-seat jetliner was an instant hit with passengers, and United’s New York Executive and Chicago Executive men-only flights


Historic photo of an actual United Caravelle at Idlewild Airport in 1962 awaiting its passenger mani­fest that will be comprised of "men only." The 5:00 pm departure headed for Chicago, while a similar flight left Chicago at the same time destined for New York, and carrying men only. In tribute to their home­land, the elegant-looking aircraft were named for cities in France, the one pictured here is Ville de Lille. (Mike Machat)

were an instant success with business clientele. United’s men-only flights continued until January 1970 when the newly formed National Organization for Women (NOW) took legal action, and filed suit to officially end the service.

Effectively filling the void in aircraft size at the beginning of the commercial Jet Age, the Caravelle offered short – to medium-range service on routes more suited to the aging propliners remaining in operation, as larger four-engined jets began to com­mand the trunk lines. American Airlines, United’s chief competitor, maintained Douglas DC-6B and Lockheed Electra turboprop operations to smaller cities on its route map (the new “CVL” code began to appear on United’s timetables in the column showing aircraft type). Perfectly suited to stage lengths from 800 to 1,200 miles, United’s pure-jet Caravelles soon became a familiar sight in the skies over the eastern half of the United States.

In retrospect, history now regards United’s Caravelles with somewhat mixed results after that fleet carried more than 10 million passengers over more than 117 million miles from July 1961 to October 1970. Although passengers favored the diminutive jetliner, the same could not be said for United’s maintenance staff, which had to deal with the aircraft’s cantankerous Rolls-Royce Avon 532R engines surrounded by an all-Pratt & Whitney – powered fleet. From both an operational and training standpoint, having mixed engine types, cockpit logic, and cabin layouts within the same airline always added complexity and cost, but in the Caravelle’s case, the trade-off was that United was able to beat its competition on short – and medium-range routes with pure-jet service until the advent of the Boeing 727 and Douglas DC-9 in the mid-1960s.

United announced its groundbreaking $60 mil­lion order for 20 Caravelle VI-Rs in February 1960 as the first foreign-built jet transport ever adopted by a U. S. airline. Ironically, they entered service on July 14, 1961—Bastille Day in France. As so often hap­pens in aviation, history repeated itself; in November 1993 United once again broke ranks and selected the Airbus A320 as its mainstay medium-range jetliner, opening the door to more North American Airbus customers in following years. Once again, an advanced twin-engined jetliner flown by two pilots and built in Toulouse, France, was proudly plying American skies.


s good as the new jetliners were for transporting passengers on worldwide routes at 600 mph, these first-generation aircraft gulped copious amounts of fuel and produced noise levels that were almost painful at close range. A further improvement to the turbine pow – erplant ensues with the development of the “fanjet” engine, which not only helps solve the fuel and noise issues, but generates even more thrust than before.

Commercial Jetliners Reach Maturity with True Intercontinental Travel

The path to full intercontinental jet travel was paved with many small steps. A dream of airline pas­sengers and airline managers alike, round-the-world passenger jet service indeed originated from humble beginnings. Remember Britain’s pioneering Comet 1?

That airplane’s first intercontinental route for BOAC in 1952 spanned from London to Johannesburg, connect­ing northern Europe with Southern Africa. As impres­sive as that might have seemed at the time, with the Comet’s modest 1,500-mile range, the trip had to be made in six legs with stops to refuel along the way. By 1954, BOAC’s jet routes extended eastbound all the way to Tokyo, but again that trip had to be flown in 10 segments with the longest single leg from Rome, Italy, to Beirut, Lebanon.

When improved models of the Comet entered air­line service in 1958, the airplane’s range had been extended to as much as 3,225 miles, allowing BOAC to “steal a march” and beat Pan American to the punch with the world’s first transatlantic jet service in October of that year. Still, the airplane had to stop and refuel in Gander, Newfoundland, on westbound flights if winds

aloft were less than optimal. Other foreign carriers used several different long-range Comet 4 models to fly on stage lengths as long as Mexico City to Chicago (Mexicana), Bombay to Bangkok (United Arab Airlines), and Paris to Beirut (Kuwait Airways).

With the first Boeing 707-120 and DC-8-30 mod­els, ranges of up to 3,000 and 3,500 statute miles were made possible, respectively. Although a significant improvement over the earlier prototype models they superseded, these gas-guzzling first-generation jets were still restricted to routes where alternate refueling stops were available. Nonstop flights from Europe to the U. S. West Coast or from Tokyo to Honolulu were still only a fantasy in the minds of airline planners every­where. For now, commercial jet aviation had arrived, and flying aboard a jet airliner was as futuristic as it got, but there was one more step to be taken to advance the art and science of jet-powered commercial air travel to its highest level —the truly intercontinental jetliner.

First to answer that need was Boeing with a new, larger, and more powerful version of its 707 simply called the Intercontinental. Formally known as the 300 series, this new queen of the skies not only made the aforementioned long-range routes possible, but carried higher passenger loads as well. When airline planners factored in the ever-important seat-mile costs (the cost of moving one passenger seat over a distance of one mile), the numbers were quite favorable and airlines


Passenger’s-eye view of the forward fan sections of engines three and four on an American Airlines Boeing 720B Astrojet. (Jon Proctor)

were able to pass those cost savings along to their pas­sengers. This factor then drove up demand, and long- range air travel was suddenly becoming more affordable for the casual traveler or family going on vacation.

Boeing 707 Intercontinental service was inaugu­rated by Pan Am in July 1959, and within one year, many if not most of the world’s foreign airlines were introducing either the 707-320 or improved DC-8-30 and -40 series into long-range service. While Pan Am could now fly anywhere on its Pacific routes, rival U. S. flag carrier TWA employed its 707-320 series both domestically and across international routes. European carriers such as Lufthansa employed their Rolls- Royce-powered 707-420 Intercontinentals on routes from Germany to the United States, South America, and the Far East.

These new long-range versions of the first-generation jets proved to be the answer to many international air­lines’ prayers, but they still operated close to their design limitations as far as engine power and inflight performance were concerned. The longer-range aircraft also consumed copious amounts of fuel as they plied the world’s air routes. Would airframe and power – plant technology and innovation result in even better versions of these new airplanes? The answer to that question came only one year later.