View Full Version : Sceadu CCPM (SWM) fly bar rattles
eeeyal
11-14-2006, 12:59 PM
I just finished installing a CCPM conversion on my Sceadu. When I give collective inputs the fly bar rattles and jitters as the swashplate works its way up the main shaft. Is this normal for the Hirobo CCPM?
> All the CCPM linkage is smooth as glass and the swash/washout block do not bind on the main shaft. I am using 9252’s on the cyclic with a 9C &148DP receiver. I have used this radio setup on my Trex 600 and everything was smooth. :?: :arggg:
Mine doesn't rattle, it is like any other heli and like what one would expect.
I am not sure I understand what you are talking about, does it shake in the direction of rotation of the head or does it vibrate in the see saw axis?
If it is the latter, you may want to check the dampners and the bearings in teh main blade grips, as they could be binding up and causing the flybar to fight the movement of the swashplate
eeeyal
11-28-2006, 07:20 PM
I know… it’s hard to explain. Before I go on it dose not seem to affect the heli in flight.
What I see is as follows:
If you look at the stabilizer control arm (0412-214) or at a paddle for that matter. When the swash plate moves up or down the paddle will vibrate (i.e. it will change angles of attack rapidly and randomly). Now I’m using 9252’s for the cyclic and the CCPM mix is properly set up (swash stays level throughout motion). The only cause I can think of is play in the washout control arms (bearings). Anyway, like I said it does not affect the flight of the heli. It’s just weird as I have never had a reaction like that on a ccpm machine before :shock: I was wondering if this is normal on a Sceadu :dontknow .
well, the only way it could be part of the CCPM setup is if the swash its self moves erratically, because from teh swash plate up, the helis are the same. I would think there is some play somewhere in the washout arms as you have said, or in teh wash out base its self.
eeeyal
11-28-2006, 08:06 PM
On your Sceadu, is there a lot of play if you grab a paddle and try to move it (change angle of attack)? I can move mine quite a bit… the play is originating from the bearings in the washout control arms. :?
I suppose maybe 5º total play. I have never been able to get this all totally out, in any heli. Once the bearings are tightened up, then there is play in teh washout base, then in the swash, etc so on and so fourth. One thing I find typical with helis is that the screws that go through the bearing are smaller than the hole in the bearing. I can't remember if the sceadu uses sleeves between teh bearing and the screw or not, I know the raptor v1s did. On any heli like that, I will use some loctite to set the sleeve to the screw, and after it cures, assemble the part. this helps immensely in teh play. you may want to check that.
Ivan
I just looked at my Evo and yes it does have sleeves. These are shouldered look like a little top hat. Since the shoulder goes to the insed of the bearing it will be hard to set them with loctite, since the sleeve has to be in teh part before the screw can be put in. Grease the little bearings well, then use a very sparing amount of loctite to set the screw. Any loctite gets in teh bearing and it will need to be replaced.
eeeyal
11-30-2006, 10:30 PM
I used some pinion locktite to do just that. It did the trick!
Thanks for the info
:mrgreen: