I crashed my Raptor 50V2 a few weeks ago. It was a hard one. I got it all back together and now I have what I'd call a low frequency wobble. If you have ever moved the cyclic stick in a small circle fairly fast, that's about what it would look like. I recall a similar occurance when I had the head speed too low on my Caliber 30. This is happening at both 1600 and 1850. All the shafts in the heli were replaced with new after the crash and checked prior to installation. Neither of the fins are vibrating nor is the fuel foaming. I had flown it a couple times before it started this wobble.
Any ideas???
Thanks,,,basmntdweller

I keep thinking I have ran into this before but can't recall a solution.

Check to make sure that there is no freeplay in the swashplate. I recently had to
replace mine. I could feel 1 to 2 degrees of slop between the rotating and stationary
parts due to freeplay in the bearings. My new plate had no freeplay at all.

Check your ball links too. I had something similar to this on my 14 year old X-Cell. New Rocket City links did the trick [>:]

My $.02, hope it helps.

David

Seen the same thing happen on a Rap50V2 due to having the thrust bearings put in wrong... Make sure they are greased and installed correctly, also make sure the damper rubbers are oiled with some silocone grease. Check your linkages too, one might have a hairline crack in it that is giving it the play to make it look like it's wobbling... eventually the whole link will go and so will the heli.