Filby
Heliman
Location: Adelaide, South Australia
| Though not exactly sure what has fixed it but the vibe is gone!
I spent the morning fully pulling it apart. I did the following things:
- Pulled out the tail and boom, removed the landing gear and bottom frame, took out the fuel tank and took the head off. This was so I could check the alignment of the frames on a piece of glass. No matter how I twisted things the rear left bottom of the frame would pull up when I tightened the screws that hold the main shaft bearing blocks. I got it as close to level as I could and then tightened everything back up again.
- Tightened the tail belt. I don't think this has done anything but was on the list of things still to check.
- Tightened the clutch hub down onto the engine. I noticed that there was about a 0.5mm end play that wasnt being tightened up when I put the nut on. I made sure that this was taken up before putting the engine back in.
After doing this I noticed that there was no slop in the main shaft anymore. This, and the re-alignment of the frames are what I believe fixed the vibration problem. The heli now goes all the way to 2100rpm without any vibration and sits in the hover beautifully!
Thanks go out to everyone who has given me suggestions over the past week!
Cheers,
Fil |
