It was the first successful twin-engined, twin rotor helicopter in the world.

First there were six of them, flying without running lights, their enormous twin rotors carving up the still night air.

Gould's twin rotor 4kw, ideal for mine site or large area evacuation.

Not strictly a scale model, but has features of many full-size twin rotor craft.

During the early 1960s the company also outlined several production designs, most using twin rotors, the largest of these was the Bo 310.

The blast from its twin rotors raised a swirling, wet mist above the surface of the water.

We exit directly onto the landing field, a white twin rotor machcoptor waits.

An engine failure could be disastrous even in the case of twin rotor configuration, similarly to helicopters.

Twin rotor, adjustable boost turbo, 350 to 400 bhp and it is quick.

This twin rotor model like the smaller R420 4DS has a higher spec for 2002.

He describes this as a solid mass probably about as big as a twin rotor helicopter.

Twin Rotors", October 1944, Popular Science bottom of page 78"

Twin Rotor design but otherwise similar to VertiBird operation and control.

The Taleban claimed responsibility, but Nato insisted there was no evidence the twin rotor helicopter had been shot down.

A Chinook is a giant aircraft, whose twin rotors thump through an oval of air a hundred feet long and sixty wide.

The big Boeing Chinook, with its twin rotor pylons, was slanting down to land.

Robust, twin rotor machine for medium/large agricultural applications and for larger turfcare operations.

And the cyclic controls, which control the speed of the twin rotors, are on the outboard side of each pilot.

Still five meters up, the twin rotor chopper sent a shower of grit across the Tradetower helipad.

NATO was recovering the remains of the twin rotor Chinook helicopter.

Twin rotors, transport.

However in the smaller classes the new 470 rotary rake and 880 twin rotor rake were equally impressive.

A great, sand-colored behemoth with twin rotors forward, and a smaller stabilizing fan aft thundered out of the west.

3m (10') Twin Rotor Slasher with dual drive enabling material to be placed under trees or pulled away to centre row.