Symmetrical Series

These blades are especially developed being used with flybarless systems. The angle between the longitudinal axis and the rotation axis of the blade is low supporting the straight and level stability. The torsion of the blade is high to prevent vibrations.

The angle between the longitudinal axis and the rotation axis is responsible for the maneuverability and agility in connection with the pitch responsibility of the helicopter.

The FBL blades are not reacting aggressively on pitch or other inputs, but it is stable during straight and level flight of the helicopter. The maneuverability of the helicopter, using the FBL system, will be adjusted within the electronic assistance system. Therefore for the electronical system a very stable straight and level flight is more important than the maneuverability, because using a FBL blade the system does need quite a lot less steering inputs than using another blade. These positive characteristics are also assisting the pilot who does not like to use the flybarless electronics but who are looking for a blade to support their helicopter`s stable flight and forward flight maneuvering.

Flybarless Series

Very maneuverable and low weight blades designed for pilots, who prefer torsionless 3 D blades. These blades do have an angle between the longitudinal axis and the rotation axis of 2 to 3 degrees. They are very agile and show a very direct action to any pitch changes. However the straight and level flight performance is optiminzed even during high speed flights.

Here’s Daniel Jetschin flying the Matt Black Flybarless Symmetrical Spin Blades on his Aurora 90:

Asymmetrical Series (or semi symmetric)

For these blades we are using an asymmetrical air foil. These blades are producing lift at an angle of attack (pitch) of 0 degree already. They are specially developed for pilots who like to fly helicopters with a fuselage and who aim for extended flight times.

How can longer flight times be achieved using the same equipment and our asymmetrical blades?

Energy is saved due to the asymmetrical air foil, since it produces lift at an angle of attack of 0 degree already. The low angle of attack produces less drag compared to symmetrical blades and less energy is needed to rotate the blade. Furthermore the chord of the blades has been increased, decreasing the aspect ratio, and reduces the circular wing loading by not changing the wing span. Furthermore the center of gravity of the blade has been shifted more to the outside, forcing the angle of the longitudinal axis of the blade the rotation axis to decrease. All these factors are allowing using less rpm for fl ying operations. Less energy is used; less wear and tear on all moveable parts and longer lifetime of the helicopter are other side effects as well.

Since the center of gravity of the blades has been shifted to the outside and the angle between the longitudinal axis and the rotation axis of the blade has been decreased, the stability has been increased, enforcing the straight and level flight. This stability supports the modern flybarless systems. But the pilot still using the paddle head will enjoy more stability too. Despite the common view of several pilots, asymmetrical blades can be used for flying rolls, loopings, inverted, etc. Setting up the system, it should be notice that for setting up the system not only the power curve should be reduced, but that the individual gear in the transmission should be changed too to get better results. This is especially required if battery driven motors are used.

Multi Blades Rotor Systems

These blades have been designed especially to be used in connection with multi blade rotor heads. They are available for three, four and five blade systems, their design is much slimmer and they are more flexible. The considerable slim construction produces a very favorable circular coverage, resulting in a steady flight performance required to duplicate the impression of the scale flight. The blades do have an asymmetrical air foil and can be operated with low rpm, thus increases the flight time considerably. Even though these blades are flexible they are very torsion resistant. This enables flights even without an electronic stabilization system. Our team pilots fly these blades without any flybarless system most of the times, but flying with the assistance of such a system is much more comfortable and relaxed. Needless to say, all our blades are well balanced prior to shipping.