Sceadu Evo Swash binding in corners, need some assistance

[Hivelocity]

I have pretty much a stock evo. I have to say thus far, I love this heli. It's my first nitro heli coming from a T-Rex 450 SE. The only upgrades I have done was the recommended radius block and also washout block.

I haven't ever setup a mechanical mixing heli and most guys at our field are flying raptors. However it doesn't seem too difficult.

I have pretty much everything set up according to the manual and based on advice from others and forum research - 90 degrees on the push pull etc level swash, 11 degrees + - collective no problem.

The problem is my cyclic. When setting cyclic pitch I have always done this by putting the pitch gauge on the blades, having the blades either parallel or perpendicular to the heli depending on if i am setting aileron or elevator. I then move the stick full one direction and set the endpoints to get the desired pitch etc.

I can get up to 7 degrees both ways full elevator or aileron without the swash hitting the main shaft or binding in anyway by setting my endpoints. I would prefer to run somewhere around 6-7 degrees

However if I go up into the corners the I get all kinds of binding at the swash, my servos make all kinds of racket and if I move my sticks in a circle the blades will actually spin a little(engine off of course). So it seems there is some mechanical binding with the swash.

I initially thought it was a problem with my linkage to the swash from servos but after removing all link and actuating manually the problem is still there- I can actually feel it when moving manually.

I have re-adjusted my head to where I think it is as close to perfect as possible using a swash leveler, micrometers etc. At zero pitch all arms are level etc.

I am using recommending ball locations from the manual for standard mobility(not auto) basically verbatim of how the manual recommends.

The only way I can get it so my servos don't make any noise in the corners is to make the cyclic pitch around 4.5 degrees - even at 5 it makes some noise however its much less.

I basically would like to know if I am doing something wrong in setting my cyclic or if I need to add a cyclic limiting ring on my transmitter or perhaps the head setup isn't quite right. Does everybody with this stock swash get similar results? Where am I going wrong?

I know I may not be up in those corners hardly ever however its hard for me to sit well knowing its a possibility and that if during a bailout or something I had to go that direction I wouldn't want my heli to explode cause I am running at 1900rpm etc....

I do notice that my blade grips have an inside hole that would give the blades more throw which in turn could give me more travel there. However I have read that this could cause flutter.

If anybody could please give me some insight, that would be much appreciated. I have done a lot of searches and I only found one other guy having a similar issue however it was because a ball was not put in the right spot. That didn't apply to my issue.

Also just an fyi - my pitch curves are linear and I am using a GV1 spinning usually 1700 or 1900.

If anybody has any questions or wants any additional info, please let me know.

Anyways I will be here :arggg:

thanks
Ben

[mudbogger2]

Binding in the corners with full travel on the swash is going to happen. You can:

A- reduce the travel of the aileron and elevator some or

B- get a cyclic ring to go on your radio.

I prefer to use a cyclic ring but everyone has there own prefrence.

[Hivelocity]

I actually spoke to Jeff@MRC and he gave me similar information.

Basically its due to the fact of the swash being round and the radio having like a rectangular ability in travel.

I will probably put a swash ring on. My whole point of starting this thread was to ensure that I didn't have anything out of whack on my heli. I haven't seen much info on setting up the head so I thought I may have some ratios off.

So for now I am going to shoot for around 6.5 degrees of cyclic movement and curve the corners with a cyclic ring.

I wander if the ccpm swash has similar issues.

mudbogger2 - did you make a cyclic ring or know of a good place to purchase them. I haven't found them at our LHS.

Also are there any websites that deal specifically with Hirobo helis? kind of like raptortechnique but for Sceadu's and such.

thanks for the help and advice

[mudbogger2]

I purchased my cyclic ring from Rick's. Search their store for "cyclic ring". They have them for many diffrent radios.

[Jimmy D]

Here you go...
http://www.ronlund.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=heli&Product_Code=FMP1012
~Double Tap
Jimmy D