contra-rotating

The project will develop new engine concepts based on open contra-rotating rotors.

Guardian Angels don't have 4 engines and 8 contra-rotating props.

The galaxy has a larger than average core, and contains zones of contra-rotating gas.

A similar contra-rotating propeller unit was later used on production Seafire 46 and 47s.

First, there is no tail rotor, and the main rotors are contra-rotating.

In most designs, two contra-rotating rings of turbine and propeller are used.

Some helicopters use contra-rotating coaxial rotors mounted one above the other.

Not long afterward the idea of contra-rotating propellers was introduced, to avoid the need for the vane.

One possibility is to enclose the contra-rotating propellers in a shroud.

The three cylinder models were equipped with a contra-rotating balance shaft mounted at the front of the engine.

The design had straight wings and contra-rotating four-blade propellers.

Two Ha40 coupled together with a common gearbox, driving a twin three-blade contra-rotating propeller.

The contra-rotating propellers also created instability that required an increase in fin area, all of which cost Browning more than $300,000.

The strength of contra-rotating propeller limited launch height .

Contra-rotating propellers have benefits when providing thrust for boats for the same reasons.

These drove eight paired contra-rotating propellers on four forward-facing nacelles.

The contra-rotating propellers and compressor are driven by the 5-stage axial turbine.

The same year, 1909, Lanchester patented a contra-rotating propeller.

Contra-rotating propellers have one propeller close behind another on the same axis, but rotating in the opposite direction.

For the 803 the engineers decided to avoid this problem by simply not using a common crankshaft, and driving a set of independent contra-rotating propellers.

Open rota engines, containing contra-rotating propellers, are, as their name suggests, not enclosed.

Among the ideas being considered are engines that are embedded within the wings and contra-rotating propellers.

The contra-rotating flywheels whirr, and the Elton makes a quiet, efficient acceleration.

The torque on the aircraft from a pair of contra-rotating propellers effectively cancels out.