Helicopter AirStair
Encyclopedia
The Helicopter AirStair, designed in house at Hydro One
Hydro One
Hydro One Incorporated delivers electricity across the Canadian province of Ontario. It is a Corporation established under the Business Corporations Act with a single shareholder, the Government of Ontario....

 Inc, Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, can be attached to a Eurocopter AS 350 B2 helicopter
Helicopter
A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forwards, backwards, and laterally...

.

It enables safe access to the top of high voltage transmission towers for power line technicians. These towers range in height from 50 feet to over 350 feet.

Overview

The helicopter
Helicopter
A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forwards, backwards, and laterally...

hovers in very close proximity to the top of the structure. The power line technician transfers from the hovering helicopter to the structure. Various safety procedures are employed during the transfer.

The AirStair is a framework that attaches to the undercarriage of the helicopter. It comprises a middle step and a lower step, with two hand rails on each side. Both doors on the pilot's side of the helicopter are removed, as well as the co-pilot seat being removed and replaced with a storage/utility box.

The use of an AirStair-equipped helicopter removes the need to access a tower from the ground. This has many advantages, as ground access often requires off-road travel across difficult terrain (mountains, rivers, farm crops, etc.). Furthermore, aerial access limits the amount of climbing required, with its inherent potential for fatigue and injury. With no land vehicles required, significant financial gains can be realized, as well as further safety increases due to the hazards of traveling by off-road vehicles being eliminated.
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