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08-16-2013 11:01 PM  7 years ago
Topic Vote0Post 1
BENTDABOOM

rrKey Veteran

west seattle

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CCPM QUESTION
working with a CCPM and JR 8103 problem is when ad full collective the swash wants to tilt forward, then when I drop the pitch itll flatten out, anyway to fix this?
CAUTION!!! politicians may be hazerdous to your well being
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08-16-2013 11:26 PM  7 years ago
dkshema

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Cedar Rapids, IA

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At the risk of giving you too much useful information that might go unheeded, read this post:

https://rc.runryder.com/p3281012/

and understand it. Especially the part near the end where it talks about leveling the swashplate and how to go about it.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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08-17-2013 10:03 PM  7 years ago
Skunkworx

rrApprentice

Quantico, VA - USA

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Sounds like you have your links adjusted too high for the swash zero position. When you go full positive you are getting some binding or an interaction from the other servos (or possibly if it's something in the radio you have an ATV limited somewhere).

Hard to tell without being there or seeing a video, but I would simply guess at the mechanical setup being insufficiently aligned (that's not to say anything bad about the mechanic BTW!!!)
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08-19-2013 02:58 AM  7 years ago
OuttaControl

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Springfield, Missouri -United states

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swash tilting
My Caliber 4 was doing the exact same thing. Turned out that the ball on the elevator bellcrank was in closer to the servos shaft than the others. Made it the same and all was good.
Mine fall down, went BOOM!!
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08-19-2013 01:33 PM  7 years ago
red_z06

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Dumont, NJ

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FBL or FB?

For FBL, it is not critical to have the swash remain perfectly level. In flight, FBL will adjust the lagging servo to keep heli in position.

For FB, assuming the geometry is good, you just need to adjust the end point for the servo that is causing it to not go the level.

1. use swash leveler with pitch at zero (set curve to 0 50 50 50 100) and use the subtrim to set the swash level.

2. do the same for full pos pitch and full neg pitch and use end point adjust to get the swash level.
www.JustinJee.com
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08-19-2013 05:45 PM  7 years ago
datidun

rrElite Veteran

N Ireland

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Interesting what you said there Red Z06,about its not critical to have the Swash level on FBL heli,mine does a very small drift backwards,unless the CG effects a FBL heli.
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08-19-2013 08:18 PM  7 years ago
red_z06

rrProfessor

Dumont, NJ

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Interesting what you said there Red Z06,about its not critical to have the Swash level on FBL heli,mine does a very small drift backwards,unless the CG effects a FBL heli.
FBL or FB, the swash needs to be level for the neutral. If it drifts, then it needs to be adjusted so the heli stays neutral.

For FBL, due to the geometry and servo pot tolerance, you may not get perfect level at full pos or neg. FBL has no way of knowing that or care.

As you go to full pitch (no cyclic), FBL will compensate for any unwanted tilt caused by the swash as it only cares about the pitch input and adjust aile/elev necessary to maintain attitude.
www.JustinJee.com
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08-20-2013 06:24 AM  7 years ago
skybob

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Park Ridge NJ USA

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Sometimes the swashplate could be dirty in that case you have to put it in the swashing machineTeam Boobie
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08-20-2013 07:54 AM  7 years ago
Volcano

rrApprentice

chicago

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In endpoints- instead of adjusting the servo that wont go far enough, adjust the other two lower. You cant increase the one thats binding.
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08-20-2013 09:44 AM  7 years ago
datidun

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N Ireland

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I still think its normal if there is a full tank the heli will have a slight drift coming back due to the CG being off,a FBL system wont cure this,im no expert on the FBL system as i only have one,the rest are FB.
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08-20-2013 01:04 PM  7 years ago
dkshema

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Cedar Rapids, IA

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You cant increase the one thats binding.
The problem is rarely caused by a servo binding up or reaching a mechanical limit. It is more typically caused by the differences between servos and/or variance in servo linkages themselves. A single channel end-point travel adjust will take care of the problem in the majority of cases.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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08-20-2013 03:05 PM  7 years ago
datidun

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N Ireland

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Yes if its it a fly barred heli,but Fbl systems would differ,for example if there is interaction on the Beast x,there is no way of removing that,but it does not effect things in flight,thats what i like about the FBL system.
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08-20-2013 07:26 PM  7 years ago
Simmer

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Massachusetts

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OK well lets get some data.
I have owned an 8103 for quite some time.

Did it used to work properly? if so, when did this issue occur?

What servos on cyclics? (are they the same type? model?)
Can you take off the linkages and see if the travel on each servo is consistent with each other? (we typically buy them (all three) at the same time to minimize any electrical differences between them.

Did you zero out the trims on the transmitter when you went through the setup?
(you can copy the model memory to a new position and mess with that one so as not to mess the initial settings)

Does it move in the proper direction at mid stick, left right forward, back ?

Is it flybarred? or flybarless?
if FBLess what is your stabilization device? Ikon, BeastX ,
other ?
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08-20-2013 07:30 PM  7 years ago
red_z06

rrProfessor

Dumont, NJ

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LOL

No reply from the OP in 4 days.
www.JustinJee.com
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08-20-2013 07:52 PM  7 years ago
Simmer

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Massachusetts

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did not notice that. Checking the birth day the poster is 63 years old. Was going to say maybe they were on vacation or something Oh well
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08-20-2013 08:32 PM  7 years ago
red_z06

rrProfessor

Dumont, NJ

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It's a TQR. www.JustinJee.com
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