ECO 8/16 Symetrical Pitch Window MOD.

Well, after some unsuccessful research, I figured out for myself how to get a good setup for the stock ECO head.

If you just set the linkages for the max pitch window, you should only get +8 and -8 degreees. That was a little low for comfort. And at the extremes the mixer levers were at "unnatural" positions.

So, I seriously shortened the links between the flybar and the mixer lever (the shortest link). That thing is about 1/8 inch too long for a good SYMETRICAL pitch setting.

SO with a little trimming, and some CA for safety, it works! Today was the first inverted hover!

Be sure that at mid-stick (50%), that both the mixing levers and the pitch compensator arms are horizontal. Remember that with a symmetrical setup, your hover should be at about ¾ stick positive and ¼ stick inverted.

With this setup, I have for Normal mode, +11 to -5; for aerobatics +11 to -11; and for Auto's +13 to -6 degrees. No mods to servo arms was needed or anything else. To set the pitch range, I used the function of my radio.

PHOTOS

Look at how short the link between the flybar cradle and the mixing lever. This pic is at approximately the “HOVER” pitch; about +5 degrees.

This is the “LOW” pitch position at about –11 degrees.

This pic is at the Auto-Rotation setting of +14 degrees.

UPDATE: YES she does do invert just fine. My ECO has had almost a minute of inverted hover 3 inches off of the ground.