I decided to dig out another article from my old long-defunt website, BaronsHobbies.com
This is almost a decade old, from Dec 3, 2008
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Model helicopters have come a long way, and today’s modern machines are capable of astounding performance. Models differ from their full sized counterparts in many ways, and one of the biggest differences is the rotor head design itself. A mechanical stability system called a flybar is employed in most instances to add a degree of stability and make control response more predictable. Although considered by many to be black magic, all flybar equipped model helicopter rotor head designs take advantage of concepts invented in the early days of helicopter technology by Arthur Young of Bell Helicopters, and Stanley Hiller Jr. of Hiller Helicopters. Understanding exactly how these systems work can be a mind boggling quest into the mathematical world of aerodynamics, processional forces, and trigonometry (to begin with). How then can the average hobbyist gain a functional understanding of how these systems work? The answers are buried in the history books. Taking a look at the Hiller and Bell concepts can be very beneficial in understanding how the flybar equipped model helicopter head does what it does so well.

The Bell Stabilizer Bar

Arthur Young (1905-1995) was a remarkable man whose true passion was philosophy. But, after running into a frustrating roadblock on his comprehensive theory of the universe, he chose to go after a more...Continue Reading