Originally Posted by Dave Jackson
This thread is discussing the regurgitation of the previous XH-59A ABC. IMHO, any serious desire to improve the ABC concept will require research and development that is rotorcraft specific, such as;
Active blade twist.
Reverse velocity blades.
Higher cyclic rate flight controls
Dave, agreed but these are still to emerge technologies for production helicopters. Active tip servo flaps for vibration suppresion is also another important future development - this could be argued as superceding higher harmonic control. Active blade twist (when developed) will be the next significant performance improvement technology.
The X2 design team has neatly considered available "off the shelf" technologies and adapted them to a practical flying machine.