Logo 550SX swashplate setup - HeliFreak
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Old 09-16-2017, 01:07 PM   #1 (permalink)
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Default Logo 550SX swashplate setup

Hi,

is there any video, post or web page where it explains how to trim and level the swashplate? I already have pitch gauge and Soko heli tool, but I feel that I'm missing something during the setup....

Thanks!
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Old 09-16-2017, 01:41 PM   #2 (permalink)
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Eyeball it.
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Old 09-16-2017, 02:04 PM   #3 (permalink)
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What do you mean?
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Old 09-16-2017, 04:22 PM   #4 (permalink)
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Just set it up by looking at it.
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Old 09-17-2017, 03:54 AM   #5 (permalink)
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Mechanical setup | VStabi

  • eyeball all servo arms to be horizontal with flybarless unit powered and in swash level mode.
  • make servo to swash links of the same length
  • use some way ensure swashplate is level e.g. you can use Rick Lohr's swash leveling zip tool

    Swash Leveler by Rick Lohr (3 min 19 sec)
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Old 09-17-2017, 04:17 AM   #6 (permalink)
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Quote:
Originally Posted by nahemoth View Post
What do you mean?
Just look at it to ensure that the swash is perpendicular to the main shaft. That should get you to within a fraction of a degree which is plenty close enough. Final minor tweaks can be done in the field, if necessary.

The first few heli's I built were done with all sorts of levellers and tools but you come realise that actually, the mark 1 eyeball is close enough to perform perfectly well.

You still need your Soko or similar to set up the max/min pitch and cyclic though.
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Old 09-18-2017, 03:23 AM   #7 (permalink)
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Servo arms 90 degrees and use swash leveler for fine adjustments.
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Old 09-21-2017, 02:08 PM   #8 (permalink)
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I eyeball most of mine. The diabolos come with a pretty idiot proof tool, but on the rest I just eyeball. I do have a swash leveler for Logos, but I quit using it a while back because I can't tell the difference when it's all done anyway.

The typical human eyeball can detect crookedness of less than a millimeter. For a modern FBL servo to move that fraction of a mm takes such a tiny fraction of a second that we can't even detect it. And since the FBL is constantly moving or floating, making hundreds of corrections per second to compensate for instability and wind and such, that fraction of a millimeter will never be noticed by you or the vbar.

You won't likely cut yourself short on max throw as long as you're pretty daggone close.

Eyeball that sucker! :-)


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Old 09-21-2017, 04:21 PM   #9 (permalink)
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Although I know eyeballing it is good enough, I also double check with an under-the-swashplate leveler (since I'm way too lazy to pull the head) like this one

HeliOption 8mm-15mm Magnetic Swashplate Leveler Tool - 500-900 Size HPET022 | eBay
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Old 09-21-2017, 08:03 PM   #10 (permalink)
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While that Soko gauge is pretty tits. IT can be complicated to set up and use. The concept is good, but IMO it should be simpler.

Now for the swash what those guys said- level servo arms, level swash-
Zero pitch. Zero can be found a number of ways. Flat tops of grips, bolts sticking up from blade bolt holes, but if you stick the blades in and put them together you can see zero pitch very easily with no tools at all. Then 12/14 degrees collective (whaever your preference) you measure the distance from the tips and pitch calc and your good (Vbar has it also in that setup tab if I recall)
Then same neg and pos deflection.
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Last edited by smittylube; 09-21-2017 at 08:13 PM..
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Old 09-22-2017, 12:29 AM   #11 (permalink)
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Quote:
Originally Posted by stark View Post
Mechanical setup | VStabi

  • eyeball all servo arms to be horizontal with flybarless unit powered and in swash level mode.
  • make servo to swash links of the same length
  • use some way ensure swashplate is level e.g. you can use Rick Lohr's swash leveling zip tool

    https://www.youtube.com/watch?v=ojnUe8V9Wys
Set the servo arms as close as you can to level. Use the RD Lohr swash leveling tool to level the swash. Put the blades together at the side to find zero. Then just a digital pitch gauge to set pitch and collective angles. VBar and VControl is so nice !!
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Last edited by Freeskiken; 09-22-2017 at 08:19 AM..
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