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Old 10-22-2012, 12:13 PM   #1
sambini
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Default SR linkage lengths

Does anyone know the lengths of the pitch & servo rods on an unadjusted factory fresh SR?

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Old 10-25-2012, 04:42 PM   #2
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They don't give that info in the manual. so my guess would be measure them before you mess with them and make a note. With that being said, 0" pitch at mid throttle, get the swash level / adjust links as required. If at mid stick your swash is level and the blades are at zero then you can take measurements if you want, but that can vary because they are plastic parts. the important part is level swash and zero pitch at mid stick with throttle trim at zero and aileron and elevator trims centered.

Last edited by joeblades; 10-25-2012 at 04:44 PM.. Reason: added info
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Old 11-06-2012, 01:37 AM   #3
ryanbrown
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Somewhere in this forum there is already a post that gives the lengths of the rods. You could also go to your LHS and see if they will let you measure one still in the box.
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Old 11-06-2012, 10:26 PM   #4
Ed Olson
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Quote:
Originally Posted by joeblades View Post
They don't give that info in the manual. so my guess would be measure them before you mess with them and make a note. With that being said, 0" pitch at mid throttle, get the swash level / adjust links as required. If at mid stick your swash is level and the blades are at zero then you can take measurements if you want, but that can vary because they are plastic parts. the important part is level swash and zero pitch at mid stick with throttle trim at zero and aileron and elevator trims centered.

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Old 11-07-2012, 06:10 PM   #5
WH1_T-type
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Quote:
Originally Posted by ryanjameshay View Post
I'm not near my bird or a measuring doo-hickey, but I know I have seen these measurement at least a few times in this forum. This is from a thread here:

Factory Link Length:
  • Pitch (Right when facing nose): 17mm
  • Aile (Left when facing nose): 2.5mm
  • Elev (Front): 5mm
  • Adjustable pitch control links: 2mm
Check this out:
http://helifreak.com/showthread.php?...rements&page=2


It's post #17
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Old 11-12-2012, 02:17 PM   #6
joeblades
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Just wanted to add a bit more to this. The actual length could differ based on the servo arms. one tooth in one direction or the other can make a good bit of differance. Than factor in sub trim if your using a programmable TX.

Brings me back to my original post,,,,,,0 pitch at mid stick and so on. the measurments above / previous post may be a good starting point but will not in all cases be appropriate.


Originally Posted by joeblades
They don't give that info in the manual. so my guess would be measure them before you mess with them and make a note. With that being said, 0" pitch at mid throttle, get the swash level / adjust links as required. If at mid stick your swash is level and the blades are at zero then you can take measurements if you want, but that can vary because they are plastic parts. the important part is level swash and zero pitch at mid stick with throttle trim at zero and aileron and elevator trims centered.

Last edited by joeblades; 11-12-2012 at 02:19 PM.. Reason: underline
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Old 11-12-2012, 02:30 PM   #7
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^agreed. I started there with my last rebuild and then made a slight adjustment here and there as I did the 0 pitch and 90 degree servo arms (with sub-trim) at mid-pitch.

I should have mentioned that myself!
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