The Convair-Liner was a twin-engined, pressurized airliner built for the 40-50 passenger short haul feeder market of the post World War 2 era by San Diego based Convair General Dynamics.

Republic Convair 580 N2729R DTW DEC 1980.

The Convair Twine was popular in the US as pretty much all the US major operators of the 1950s ordered the Convair Twin, including Braniff, United, Delta, American, Western, Eastern, Frontier, Continental, and of course North Central Airlines, the subject of this article.

Although North Central only initially took delivery of a handful of Convair Twins in the early 1960s, additional machines were acquired through the 1960s and 70s, and by the time the airline became Republic Airlines in 1979, the Convair 580 fleet exceeded 20 examples. The Convair 580 was a sturdy well built machine that lent itself to the harsh winter operating conditions of the mid west. The primary stomping grounds for the Republic Convair 580 fleet were the “local service” small towns that dot the landscape between Chicago, Detroit and Minneapolis, as well as spanning further West through the Dakotas.

In 1986/87 Republic Airlines was acquired by Minneapolis based Northwest Airlines, the 24 Convair 580s of Republic were panted into varying degrees of Northwest Airlines’ scheme. Most were hybrid schemes.

The Convair 580 images presented here are from the slide collection of Henry Tenby.

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Dr. John Blatherwick

Two DC-3s were purchased in 1967 to supplement the company’s Cessna 310 and tri gear Beech 18 as it began a scheduled service between Sarnia and Toronto. Two Convair 440 aircraft were bought in 1969 from Swissair. Called the Metropolitan, the piston twin engine Convair 440 carried forty-four passengers and bore a colour scheme with a broad red cheat line running through the windows of the white aircraft, The upper tree quarters of the tail was red and displayed a white map of the Great Lakes within a white circle. Once the Convairs arrived, the Beech 18 was sold to Air Windsor and the two DC-3s were sold to Pem Air of Pembroke.

An absolutely magnificent shot of Great Lakes Convair 440 CF-GLC possibly at London, Ontario in July 1973. This aircraft was acquired from Swissair in December, 1969, and operated with Great Lakes until 1975, and was then parted out in 1976. In this photo it was still in the former Swissair scheme.

When London, Ontario, was added to the Sarnia to Toronto route in 1973, four more Convair 440s were purchased from Linjeflyg of Sweden. These white aircraft had a broad blue cheat line above a thin white cheatline and a thin dark blue cheat line below both and had an all-white tail. One of a variety of symbols was found on the tail, including a map of the Great Lakes in blue but with no circle, a stylized ‘GLA’ or no symbol at all. With the additional aircraft, Peterborough, Ottawa and Kitchener were added to flights from Toronto. This rapid expansion of routes using old, unreliable equipment proved to be uneconomical and the three cities were quickly dropped. For a short period in 1975, all operations were halted except the Sarnia to Toronto route. An analysis of the problems faced by the airline showed that many flights had to be unexpectedly cancelled due to aircraft unserviceability. The new routes had not been properly publicized and no feasibility studies had been made before opening new routes.

A group of Toronto businessmen bought the airline in 1975 and started to rejuvenate it. They moved the Toronto operations from Terminal One to Terminal Two and turned over the flight handling to Air Canada in Toronto and London. Air Canada also handled all Great Lakes’ ticket sales and reservations on its computerized system. The Toronto to Ottawa via Peterborough route was resumed in April 1976 but Kitchener was never re-introduced to the schedule.

When Air Canada retired its Viscounts, there was a hockey charter market for a forty to fifty passenger aircraft in Southern Ontario. Professional hockey teams, however, refused to fly in old piston equipment and the decision was made to purchase Convair 580 aircraft from Allegheny Airlines. The Convair 580 was a Convair 340 piston aircraft re-engined with twin Allison 501 turboprops. The interior of this aircraft was the same capacity as the Convair 440 except that the galley and lavatory had been moved to the front of the plane permitting two additional rows of seats to be added, thus increasing the capacity to fifty-two passengers.

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These aircraft were all white with a brown cheat line through the windows. Below this an orange cheat line broadened downwards as it swept aft. Below this was another brown cheat. The new company logo was displayed on the white tail and the airline’s name appeared in brown on the upper fuselage. The Convair 440s were kept for a short time as backup aircraft before being sold or broken up.

The Convair 580 entered service with the company in March 1976, using experienced Allegheny pilots as co-pilots. Four aircraft were purchased within a year and the company was once again on solid financial footing. In October 1976, Great Lakes took over all but one flight per week between London and Toronto from Air Canada.

In January 1977, the company moved its headquarters from Sarnia to London, Ontario, and later that year purchased Flightexec Ltd. of London, which operated executive aircraft charters in southwestern Ontario using a Piper Aztec. The company continued to operate Flightexec Ltd. as a separate airline.

Great Lakes applied for the Toronto — Sault Ste Marie — Thunder Bay — Dryden — Winnipeg route relinquished by Transair when it merged with PWA, but the route was awarded to Nordair. In need of expanding its routes, Great Lakes also hoped that Air Canada would phase out its short DC-9 routes in Ontario (such as Toronto to North Bay and Sudbury), but it would be another decade before these routes would come available to the airline. Thus the company continued to operate with only Sarnia, London, Toronto, Peterborough to Ottawa route, with the London to Toronto segment being the most profitable.

During the summer of 1979, Great Lakes began flying small package charters from Toronto to Western Canada. The aircraft involved were stripped of their normal passenger seats and soon Great Lakes Convair 580s were seen frequently in Vancouver, Calgary, Edmonton and Winnipeg. In October of that year, Flightexec added Cessna Citation C-GJTX raising the fleet of this subsidiary to seven aircraft based in London and Windsor.

A fifth Convair 580, added in December 1979, carried the registration C-GJRP, JRP being the initials of the company President, James Robertson Plaxton. Regular scheduled flights and charter flights kept the airline so busy during February 1980 that it was necessary to drop the flights to Western Canada for Purolator Courier until April 1980.

In January 1981, the company again dropped its Toronto to Peterborough and Ottawa service, which were picked up by Air Atonabee. In February, Great Lakes introduced its direct Toronto to Ottawa service operating Monday to Friday only. Great Lakes also formed an off-shore helicopter support division which included five Sikorsky S76As. The S76s were delivered in 1985. The company changed its name to AIR ONTARIO on April 27, 1981. Convair 580 C-GDTC was the first aircraft flown in the company’s new colour scheme, a white aircraft with no cheat line, the title AIR ONTARIO displayed in dark purple on the upper fuselage. The purple tail was broken by a horizontal green stripe with a narrow white strip above it.

Purolator Courier services were reduced in March, 1981, and discontinued altogether in April, 1981, being taken over by Kelowna Flightcraft Convair 580s. In December, 1981, 50% of the stock of the parent holding company was purchased by the Deluce family of Timmins who were the owners of Austin Airways and White River Air Service. This story continues in the Air Ontario photo history page.

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Back in the late 1980s, Canadian Regional airline Time Air operated a healthy fleet of Convair 580 and 640 aircraft on their western Canadian charter network.

These aircraft were based throughout Western Canada and operated an extensive network of seasonal sport and fishing charters for the company, until they were eventually replaced by newer Dash-8 aircraft.

At the time, I made a number of trips to fly on Time Air’s Convairs and interviewed key staff to prepare the in-depth article below for Airliners magazine. The only sad part of the story is that the Convair fleet did not last longer.