Daniel Reese
Senior Heliman
Location: Urbana OH
My Posts This: Topic Forum | it is physically IMPOSSIBLE for the flybar to strike the fuse IN FLIGHT. Can happen when you spool up if you dont level it first - just level the flybar then spin up.
IT CANNOT happen in flight.
I have this same setup Align TRex600 in both TT's MD500, FunKey's MD500, Century's MD500 and Align's MD500.
When spinning, the flybar and the main rotor blades are absolutely fixed in their relative positions to eachother. In flight, the main rotor blades operate in a plane that is perpendicular to the main mast and varies by less than a degree no matter how hard you fly.
On the ground, if you have the throttle pretty low and really push hard on the cyclic you can get the rotor disc to tilt a few degrees only before it tries to roll the whole machine on the ground.
In flight, the fuselage "hangs" below the rotor disc- being pushed around by the main mast. When you give a cylcic input, the fuselage is pushed away in the opposite direction. The effect of that is that, in flight, in relation to the fuselage, the rotor disc moves less than 1 degree no matter how aggressive you're flying.
But dont take my word for it, get out your ruler/protractors and measure these distances:
Measure the angle the flybar will have to drop in order to contact the fuse (in my case with a very low main rotor its about 8*)
Now apply that same measurement to the main rotor.
Notice that the main rotor would have to cut through the tail boom to get that low! That means that, in order to get the flybar low enough to touch the fuse (IN FLIGHT) the main rotor would have to cut through the tail boom to get there. THe only way that's gonna happen is if you've already got some serious rotor head issues and by that point, the flybar is the least of your concerns.
This question aught to be a sticky since it comes up at least once a month... |
