Helicopter
A rotorcraft achieving vertical flight via horizontally spinning rotors.
A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of short take-off and landing (STOL) or short take-off and vertical landing (STOVL) aircraft cannot perform without a runway.
- common configuration
- single main rotor with tail rotor
Lore & Background
Although most earlier designs used more than one main rotor, the configuration of a single main rotor accompanied by a vertical anti-torque tail rotor has become the most common helicopter configuration. Twin-rotor helicopters (bicopters), in either tandem or transverse rotors configurations, are sometimes used due to their greater payload capacity. Coaxial-rotor, tiltrotor and compound helicopters are also all flying today. The word is often rebracketed as heli- and -copter, leading to words like helipad and quadcopter. English language nicknames include 'chopper', 'copter', 'heli', and 'whirlybird'.
Reader's Guide
The helicopter represents a pivotal advancement in aviation, enabling vertical takeoff and landing, hovering, and multidirectional flight without the need for runways. This capability makes helicopters indispensable in congested or isolated areas where fixed-wing aircraft cannot operate. Helicopters have diversified into twin-rotor, coaxial, tiltrotor, and compound designs, while quadcopters and other multirotors have become central to unmanned aerial vehicles (drones) for commercial and military applications. The helicopter's unique flight characteristics continue to enable roles in transport, rescue, observation, and combat that no other aircraft can fulfill.
From Tiger Moths to Rotorcraft: The Penticton Beginnings
After World War II, two former Royal Canadian Air Force instructors, Carl Agar and Barney Bent, wanted to keep flying. They launched the South Okanagan Flying Club in Penticton, British Columbia, with a handful of de Havilland Tiger Moths. When private pilot training proved too thin, the group—soon joined by ex-RCAF engineer Alf Stringer—relocated to Kelowna and rebranded as Okanagan Air Services Ltd., initially flying Cessna 140s for charter and training. Agar, however, had his eyes on something newer. The three men traveled to Yakima to watch a Bell 47 demonstration, the first helicopter to earn commercial certification, and were immediately convinced of its market potential. Agar's mountain flying for government topographic surveys earned him the Trans-Canada Trophy in 1950 and brought valuable publicity, while contracts from Aluminum Company of Canada Ltd. opened doors to remote construction support. Despite these wins, the company stayed unprofitable through its earliest years.
Scaling to the Largest Operator in North America
Throughout the 1950s, Okanagan played a key role in constructing and maintaining the Mid-Canada Line of radar stations, deploying a mixed fleet of Sikorsky S-55s and Bell 47s. The 1970s marked a dramatic transformation. Both Agar and Stringer had departed during the 1960s over disputes about company direction, leaving Bent as the sole remaining founder. Okanagan then embarked on an aggressive acquisition spree, absorbing Universal Helicopters, Haida Helicopters, Lac Saint-Jean Aviation, Dominion-Pegasus Helicopters, Sept-Iles Helicopter Services, Associated Helicopters, and Bow Helicopter.
The CHC Era: Building a Global M&A Machine
All three were merged with Dobbin's own Sealand Helicopters to form a new entity initially branded Canadian Helicopters, with the parent renamed CHC Helicopter Corporation. From the outset, the new company placed heavy emphasis on mergers, acquisitions, and strategic partnerships as the primary engine for entering new or underserved regions, including South America. This relentless consolidation strategy transformed a regional Canadian operator into a multinational presence, laying the groundwork for the global footprint the company would eventually maintain.
A Global Fleet Serving Energy, Rescue, and Government
Today, CHC Helicopter is headquartered in Irving, Texas, and incorporated in Newfoundland and Labrador. CHC's core business revolves around helicopter transportation services for the offshore oil and gas industry, placing it alongside competitors such as Bristow Helicopters and NHV as one of the few truly global providers in that niche. Beyond energy-sector transport, the company also supports search and rescue operations and government departments. Through its Heli-One division, CHC offers helicopter maintenance, repair, and overhaul services to organizations that need dedicated MRO support. This diversified service portfolio—spanning commercial transport, emergency response, public-sector contracts, and technical maintenance—reflects the breadth of capabilities accumulated over decades of acquisitions and organic growth, from a single Bell 47 in British Columbia to a multinational fleet serving clients on four continents.
Frequently Asked Questions
What is a helicopter?
A helicopter is a rotorcraft that generates both lift and thrust through horizontally spinning rotors. This design lets it take off and land vertically, hover in place, and maneuver in any horizontal direction without needing a runway.
What is the most common helicopter configuration?
The standard layout pairs a single main rotor on top with a smaller tail rotor at the rear. The tail rotor counters the torque produced by the main rotor, keeping the fuselage stable during flight.
Why can helicopters operate where fixed-wing and STOL/STOVL aircraft cannot?
Because they do not require a runway for takeoff or landing, helicopters can access congested urban zones, remote islands, and other isolated locations. Fixed-wing and many short-field aircraft simply lack the vertical lift capability to function in those environments.
What flight directions can a helicopter perform?
In addition to standard forward flight, a helicopter can hover, fly backward, and move laterally (sideways). These multi-directional capabilities come directly from the way the spinning rotors distribute lift and thrust.
What is the key mechanical principle behind helicopter flight?
The horizontally spinning rotors act as both the wing and the engine's output, producing the aerodynamic forces needed for lift and propulsion simultaneously. This single-rotor system is what distinguishes a helicopter from propeller-driven fixed-wing designs.
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