Helicopter rotor working demo's Part 2

Because our final goal is a full demonstration of cyclic control and lift control we tried to improve the results from the first trial. The result is a rotor design that can be driven by a motor. The Lift and two cyclic controls are realized using worm gears . This model could be used as a directionable fan. However, the rotation speed is not very high.

The following three images show more details. The elastic string provides a downward pressure on the blades.

The design for the transmission was found on  LEO & LEGO


Latest trial

We are currently doing experiments with an improved control for the last design and designing a new balance to demontrate lift, landing and cyclic control.

This month, september 2002, I discovered a very beautifull model by Ross Crawford that shows all the controls! Why haven't I seen his model earlier ? .