RunRyder RC
WATCH
 1 page 1148 views POST REPLY
HomeAircraftHelicopterThunder TigerRAPTOR X50 › X50 Head Build
06-11-2012 01:33 AM  6 years agoPost 1
DaweMD

rrNovice

Beaumont, Alberta, Canada

My Posts: All  Forum  Topic

Guys I am including some pics of my head setup so I can get some opinions back on how it looks. I just replaced my Hitec cyclic servos with these Savox SC-1258TG’s, they seem like they should have enough torque and speed so I could run flybarless down the road. They only thing I have found about them so far is that they are noisy when just sitting there, they were fine without any servo arms but as soon as they went on there they got noisy. Sometimes if I bounce the sticks around a little they go quiet again. This was a new build for me so the linkages are stiff, maybe that’s why they are noisy?
My swash mix is set @ Aile & Elev both set at 60% and pitch is set at 55%(Gives me +15/-15). Travel adjust are all set at 100%, Sub trims are Aile: L32, Elev: D33, Pitch: L40. While these numbers seem high it seemed to be the best I could get in order to have the head come out like the pics.
I tried using a leveling tool that I got from Espirit models but it did not help me. I have 2 other 450 size heli’s that I have used leveling tools on before and they worked without any issue, this heli I can’t figure out! I go to mid stick and adjust linkage to make the swash go straight, than go to top stick and adjust travel adjust to make things right, than go to low stick and do the same. This is where it gets weird – I go back to top stick and it is out of adjustment again! As I go through the stick positions it will change every time until I am at 0% travel adjust on the low side! Maybe someone can tell me what I am doing wrong.
Thanks guys.

Michael Dawe

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2012 01:32 PM  6 years agoPost 2
taxus812

rrApprentice

Conecticut - USA

My Posts: All  Forum  Topic

The geometry does work honest ! I am willing to bet your servo linkage are not square. Time to go over the setup again

The trick is getting a few points on the money first. My assumption (based on the pic) is this is a standard head with no modifications.

Set your radio to default pitch curves and sub trims and trim to zero. Go into monitor (if you have it) and set collective to mid-stick.

First thing you need to get is the elevator control arm pin centered in the hole in the frame. Then make sure you servo linkage is square on the rear servo. To confirm measure from corner to corner of the box the linkage makes.They should be equal. (Note: If you have to use a bit of sub-trim to get the servo horn square then use it. I prefer not to but that is what it is for)

TIP: To adjust the linkage lengths, use the center screw of the server horn to the center of the turnbuckle as a measurement, Don't make them to tight and the servos should not buzz)

Next
The length of the elevator control arm is 55mm if your swash is going to be level the front two swash linkages will be 55mm (it works out this way and it is in the manual). Set them to 55 mm center to center (you shouldn't have to adjust them once set).

Now square your servo linkage to the bell-cranks as you did the rear. confirm by measuring cross corner they should be equal. Do this for both sides(If you need to use a bit of sub-trim to get the servo horns square, you can)

NOW if you are successful there are few visual queues to let you know it is correct. At mid-stick, You should be able to draw a line through the elevator control arm pin, the rear servo bell-crank, tip of the servo turnbuckle, and bolt of the turnbuckle. (both front servos can be set up this way)

you can check swash level for the full range for travel and it should be spot on. I didn't use a leveling tool I use a a zip-tie on the main shaft and measure to the swash at three points

Also don't expect to get +\- 15 collective and +\- 8 cyclic without binding in the corners. I run +\- 11.5 collective and +\-8 cyclic with no binding in any position and it needs nothing more.

I hope this helps. I spent hours trying to get mine right. Once I figured this out it all clicked. I need NO subtrim or RX compensation. I get clean vertical climbouts with no left or right drift. My servos are silent with no load.

Man is so anxious about his future that he does not enjoy the present. - Dalai Lama

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2012 05:37 PM  6 years agoPost 3
Swoop

rrElite Veteran

Newark, DE USA

My Posts: All  Forum  Topic

What radio? I helped a friend set up a dx6 and noticed a strange behavior when leveling the swash at full pitch. I actually had to hold in just a little bit of cyclic when dialing the ATV's, otherwise the ATV would just adjust the low-end throw.

For instance, I would have to hold a little right or left cyclic while adjusting the aileron servo high endpoint, then release the cyclic to check level. If I didn't hold a little right or left in while making the changes, the radio would increase/decrease the travel on the low side instead of the high side of the servo travel. So basically I'd get no movement while stepping the ATV while at full pitch, but then would end up with excessive travel when checking full negative pitch. Just wondering if this is whats going on with you. My 9303 does not behave this way, so not sure if its a glitch or normal.

As for the buzzing, remove one of the push-pull links and see if it goes away. If it does, then your not perfect on your link lengths. If the buzzing remains, its probably just friction between the new tight links and balls. I use a ball link sizing tool to get just the right fit.

I also agree with the setup offered by taxus812.

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2012 07:02 PM  6 years agoPost 4
DaweMD

rrNovice

Beaumont, Alberta, Canada

My Posts: All  Forum  Topic

X50 Head setup
Thanks for the great feedback guys. I should have mentioned it was being used with a DX7 Radio and AR7000 Receiver.

Michael Dawe

PM  EMAIL  GALLERY  Attn:RR  Quote
06-13-2012 05:38 AM  6 years agoPost 5
DaweMD

rrNovice

Beaumont, Alberta, Canada

My Posts: All  Forum  Topic

Final X50 Linkage setup
After another couple of nights tinkering with the servo wheels and linkages I think I have come as close as I can get. I have included pics of my final setup.
Pitch with this setup is giving me +12 to -12. Aileron is +/-8 Deg. My swash settings are as follows:
Aile = -40%
Elev = -40%
Pitch = +48%
Sub Trims are set to:
Aile = R6
Elev = U7
Pitch = L7
Travel Adjusts are all = 100%
When I measure corner to corner (opposite balls) I get equal numbers and my linkages are equal lengths.
Let me know what you guys think please.

Michael Dawe

PM  EMAIL  GALLERY  Attn:RR  Quote
06-13-2012 11:37 AM  6 years agoPost 6
datidun

rrKey Veteran

N Ireland

My Posts: All  Forum  Topic

Mine are the same very noisy as in buzzing,3x Align ds 610 it could be just the servos,im sure Savox and Align are from the same company.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-13-2012 12:25 PM  6 years agoPost 7
taxus812

rrApprentice

Conecticut - USA

My Posts: All  Forum  Topic

That sounds a lot better. Pictures are hard to judge accuracy from. The servo and bellcrank linkages look square. The reference line (formed by the bellcrank and elevator contol arm) looks off BUT in another picture it looks ok.

If the servo push pull linkages and bellcranks are square, and the front swash linkages are 55mm, you are all set.

For reference my dx8 my swash is setup is
Ail +70
Ele +70
Pit -60
Expo act
E-Ring act

Travil adjusts 100%

So I get +- 11.5 collective and 8 cyclic

Man is so anxious about his future that he does not enjoy the present. - Dalai Lama

PM  EMAIL  GALLERY  Attn:RR  Quote
06-13-2012 05:01 PM  6 years agoPost 8
DaweMD

rrNovice

Beaumont, Alberta, Canada

My Posts: All  Forum  Topic

X50 head setup
Thanks guys, appreciate the help.

Michael Dawe

PM  EMAIL  GALLERY  Attn:RR  Quote
06-13-2012 05:50 PM  6 years agoPost 9
taxus812

rrApprentice

Conecticut - USA

My Posts: All  Forum  Topic

No problem,let us know how it worked out.

Man is so anxious about his future that he does not enjoy the present. - Dalai Lama

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1148 views POST REPLY
HomeAircraftHelicopterThunder TigerRAPTOR X50 › X50 Head Build
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Monday, August 20 - 10:09 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online