Item 0887

DESIGN: UniCopter ~ Rotor - Disk - Downwash - in Hover & Forward Flight 

Drawings:

Single Disk in Hover:

This drawing belongs to SynchroLite [item 0721]. It must be revised for the UniCopter.

When revised for the UniCopter this drawing will show additional thrust at the blade roots due to the increased twist, resulting from the Independent Root and Tip Control.

 

Both Disks in Forward Flight:

The sketch below shows the downwash (lift distribution) in fast forward flight. It will be noted that there are two areas of lift along the span of the retreating blade. The lift at the tip end is conventional whereas the lift at the root end is due to Reverse Velocity Utilization

Direction of rotation is non-breaststroke (outside forward).

Notes:

Consider using a blade planform similar to that of Sikorsky's X2. This will offset the thrust from the sectors of the blades on the two rotors when the blades are near 90º and 270º azimuths. However, it will increase the thrust moment arm lengths and may be of little value when the blades are near 0º and 180º azimuths.

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Last Revised: October 15, 2011