The Helicopter

in partnership

Teachers, Parents and Governors working in partnership

Teachers, Parents and Governors working in partnership

Teachers, Parents and Governors working in partnership

by Leonardo da Vinci in 1475.

Not until 1909 was a helicopter able to remain in the air for two minutes.

The first helicopter worthy of the name was the Focke Wulf Fw61.

In 1963 it flew for 16 minutes at an altitude of 20 metres above the ground.

In 1942 de la Cierva managed to fly 12km in his autogiro

blades are shaped like aeroplane wings with a curved upper surface.

Air flows faster over the top of the blades than beneath giving rise to an upward suction effect.

Bearwood Primary School

The rotor of a helicopter creates lift and generates propulsion (forwards, backwards and sideways).

The air flow below the rotor blades is slower resulting in pressure, so the total effect is that the helicopter is pushed upwards.

LIFT

varied precisely as the blades pass a certain point determined by the swash plate.

Bearwood Primary School

The direction in which a helicopter flies is controlled by changing the angle of attack, or pitch, of the individual rotor blades. This change is cyclical

FORWARDS

Pulling the cyclic control back increases the pitch of the rotor blades as they pass in front of the hub. This results in backward flight.

BACKWARDS

the cyclic control to the right or left increases the pitch of the rotor blades as they pass to the left or right of the hub.

SIDEWAYS

stabilise the helicopter. Without it the helicopter would rotate about its own axis.

Bearwood Primary School

The main rotor generates a torque which has to be offset by controlling the thrust produced by the tail rotor.

STABILITY

The tail rotor is controlled by the pedals

Primary School

EH101

Our Model

Designed to satisfy Naval, Military and Civil roles

SPECIFICATIONS Height 6.63 metres Length 22.8 metres Main Rotor diameter 18.6 metres Payload 5400 Kg Range 1000 km Speed 309 km/hr 3 Jet engines but can run on only 2.