DESIGN: SynchroLite ~ Rotor - Hub - 3-blade - CVJ & HS - Hub Spring - Azimuth Teeter

• The rotors turn inside forward, (breaststroke).
• A safety device to stop any chance of the rotor disk from teetering down excessively at around the 15º azimuth and causing a closing blade tip to pass under the blade on the other rotor.
• Note that the wheel or ramp is quite a distance above the frame.

• This device will be mounted on the power-train frame (non-rotating) and press against the rotating rotorhub if the teeter, for some extremely unusual reason, is becoming excessive.
• Consider using a small cam follower. The cam follower could have a neoprene cover over it's OR be mounted on a resilient support. The bottom of the 'bell' will ride against the cam follower when the downward teeter over the cam follower tilts down toward 8º. A rubber covered camfollower might be better because any previous contact with the 'bell' will be visible, during a subsequent pre-flight walk-around.
• There will probably be a specific azimuth where the blade(s) must restrained from excessive inward tipping (say 15º azimuth). It may therefore be possible to locate the 'cam-follower at this azimuth. This way the cam-follower may only have to make contact with the 3 'spokes' of the hub and there is no reason for a full hub ring. In addition, the cam-follower can be located outside the passage of the rotating pitch-links. The base of the outer three portions of the crown may have to be made flat and have a larger than usual width.
• The cam follower, or first cam follower, should be early enough in the azimuth of rotation that any downward flexing of the blade, which might be caused by the cam follower itself, does not whip the blade tip down at the critical closing azimuth.
• A blade-blade or blade-hub contact after this azimuth will be nothing more than stropping, assuming that the blade and hub have a smooth continuous top surface.
• Why cannot it be a low friction plate instead of a wheel. Perhaps this plate has strength and is mounted on a thin rubber pad.

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