At the risk of piling on, let me pile on....
The Chinook has normal cyclic control on each rotor, both lateral and longitudinal. The Chinook data that I have specifies that each rotor has almost 50 degrees of longitudinal cyclic capability (as measured in blade pitch angle). Lu is wrong, Chinooks have longitudinal cyclic.
Furthermore, with the drivel about spending more time at low speed somehow adding to stresses, Lu is also dead wrong. Not only is low speed the LOW stress regime, but even the ill-founded rumor mill that Lu owns can't invent bad component lives for helicopters that have good lives.
Give it a rest, Lu.