Disciple4123
Veteran
Location: Waynesboro, VA USA
| I have converted the Acrobatic, it is a cameraship, weighing 20 lbs, using the 9.01:1 gear ratio, #427 blades (wide chord 820mm). I am very pleased with the control with HC Rigid stabilizing it, now I have an issue. Initially the head dampening was very tight like I had it flybarred, it vibrated with the tight dampening as a flybarless. I loosened it up by removing my homemade center ball equivalent on the head axle, it got much better. Now the dampening is tighter than Vario stock, but I cannot loosen it further without buying a head axle (I had previously milled 30/1000 " off of it.) Is it common to need looser dampening for this sort of application? I am trying to stay away from the problems with oring dampened heads and excessive play, namely a loose null zone in the dampening and oring damage. I can loosen it slightly further by buying a head axle if needed. It does better at 1290 RPM and worse below 1250.
So far I have statically and dynamically balanced the blades (they were perfect).
I have worked the tracking to and fro in 1/2 turn adjustments, it is just about perfect.
I have also run the blades at different tightnesses, to manage lead-lag, no difference noticed at all reasonable settings.
The other possibility is the following: I am using rocket city ball links on the bottom of the pitch rods, and Vario ones on the upper. Vario links are always a little loose, and these have about 1/4mm of play in them. Perhaps a little play is the culprit? Any guesses out there, is the rod play involved or too tight of dampening.
I must say the flybarless seems more responsive AND stable than a flybar has ever done for me.
Eric |
