SynchroLite ~ Control - Flight - Empennage

Overview:

Ruddervator: -or- Stabilator. The rudder (vertical tail surface) is non-movable. The Ruddervator and Stabilator must be thought through better.

The choice is between the Ruddervator and the Stabilator, with the stabilator being the current preference.

Picture:

Eventually

Ruddervator:

It has an inverted 'V' configuration and both airfoils are sloped down at 45 degrees from the horizontal.

Located on the tail boom and below the 75% point of the rotor radius.

Both surfaces might be independently controllable; for pitch, roll and yaw. Both surfaces pitch down for autorotation.

Total rotation of each ruddervator is 90 degrees. + or - 30 degrees for pitch, roll and yaw plus -30 degrees for autorotation.

Yaw: Left and right ruddervators rotate in opposite directions about their pitch axis. This force is used to compliment the yaw forces caused by the rotors. Maximum rotation for yaw is +/- 30 degrees. Movement of pedals causes this rotation.

Autorotation: Both ruddervators pitch down 25 degrees to maintain airflow against the top surfaces. Movement of collective lever causes this rotation.

Cyclic: pitch and roll assistance could possibly be added later. This will reduce the cyclic demands that are conveyed to the two rotor hubs, there by reducing the required teetering limits and increasing the blade to blade clearance between rotors.

-or- Stabilator:

Rotates up to + & - 45 degrees about X-axis (roll); to assist rotor disks with yaw control during hover. Movement of pedals causes this rotation.

Rotates approximately -30 about Y-axis (pitch) at autorotation. Movement of collective lever causes this rotation.

The Ruddervator and Stabilator must be thought through better.

Rudder:

Conventional.

 Working Papers:

 

DESIGN:

 B179

MAKE:

B098

Items:

DESIGN:

 

Name

Item

 

Control - Flight - Empennage - Ruddervator Layout

0031

 

Control - Flight - Empennage - Stabilator Layout

0718

For additional design information related to flight control by the empennage see: Fuselage - Tail

MAKE:

 

Name

Item

 

 

 

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Last Revised: April 30, 2000