Lardfly
Senior Heliman
Location: Mapleton, Ia
| This HDX300 CNC head sure is smooth running and pretty, but it collective jumps all over the place. I have tried everything and can't find a cure. The two Bell system pushrods leave the swash and angle up to the mix arms. If you hold the head still you can rotate the swash nearly 15 degrees CW and CCW. That allows the blades to increase or decrease a couple of degrees all there own due to these two Bell system pushrods straightening up and angling back again. Now most of the larger helis I have dealt with had a swash follower that turned the swash with the shaft so it was captive under head and did not rely on the pushrods to drag it around. Isn't anybody having this problem? I have this installed on a BCP using the HDX shaft and gear and it is fantastically smooth but collective jumps are a nightmare. If I am doing something wrong with the set-up please advise. Everything is hooked up just like the pictures show and short of trying to come up with some kind of follower or guide arrangement this thing is too spooky to fly. I have to believe there is a quick fix and I have something obviously honked up installation-wize since I have not heard any grumblings pertaining to this issue on this head. Again, it's not the head that is sloppy, it is the linkage between the swash and head that is causing it, I think? Please help!!!! |
