Well I'm also having problem with my servo links on my 500 FBL. My 500 came with no manual so I tried using Align manual but theirs servo links and swash plate links numbers don't work. I've been trying different numbers on the servo/swash plate links but no luck yet. Can anyone throw some combination numbers from center to center on the servo links and the swash plate links that I can use as a reference? I should of took some measurement down before I started switching parts around. I will no better next time.
Hi D.O.G., I use a digital calliper to measure the lengths. One of my most useful purchases since starting seriously last year.
Do you have a swashplate levelling tool? If so, then it's quite easy to do the measurement. Take the links off, level the servo arms, place the levelling tool under the swashplate and measure either top to bottom of the balls or centre to centre if you prefer. That should bring you very close to the actual size, possibly with no further changes.
If you don't have the tools, then with the links disconnected and the swashplate sliding freely, lift it until the washout arms come level and using some wood or stiff cardboard folded up support the swashplate in this position. Then again with the servo arms level offer up the links until they are the closest you can get them to correct or using your best metal rule with fine increments (mm, 1/16 or 1/32) measure them. Do the same thing for the top links with the blades held horizontal (as close to zero degrees). Again, since I bought a digital pitch gauge this is very easy. You probably need a second pair of hands to hold the blade steady during the measurement.
I'm not planning to go to my workshop today but I could take a couple of photos to help.
Finally, of course, (if you have a gyro with good clear instructions LoL) you need to do the setup using your newly sized links and fine tune accordingly.
P.S. What heli is it? Maybe there's a manual in the Internet to download.