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Kit built 4*40 control throws questions.

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Old 06-23-2007 | 02:20 PM
  #1  
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Default Kit built 4*40 control throws questions.

I did a search and found through tower hobbies that the throws should be 1" R/L on rudder, 1/2" U/D on elevator, and 5/8" on ailerons. (more on this at the bottom)

I did searches here, and found this thread: http://www.rcuniverse.com/forum/m_10...tm.htm#1054764

It says the same except ailerons call for 5/8" up and 1/2" down. My fourstar has one servo operating both ailerons. How can you set this? If i set it down less on one side, it'll be less on the upside for the other direction.

Not to mention, doesn't 5/8" on ailerons vs. 1/2" on elevator seem a bit odd?

Tower hobbies has this: http://www2.towerhobbies.com/cgi-bin...&I=LXFKA9&P=ML
Center of Gravity: 2-15/16" (74mm) Back from the wing's leading edge
Control Throws-
Elevator: Up & Down 1/2" (13mm)
Rudder: Right to Left 1" (25mm)
Ailerons: Up & Down 5/8" (11mm)

If you notice, 1/2" - 13mm is pretty much accurate.
then 5/8" - 11mm.......thats not right.

I wonder is it supposed to be 11mm, or 5/8" ?????
Just seems like a lot of ailerons compared to elevator to me. I've never had the manual for this four star, I bought it used a while back. Any help/input is appreciated.
Old 06-23-2007 | 02:53 PM
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Default RE: Kit built 4*40 control throws questions.

If you put the servo horn, or wheel, on so the pushrods attach at approximately the 10 o'clock and 2 o'clock positions; you will get more travel up than down on both sides. I made a very rough drawing.

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Old 06-23-2007 | 04:51 PM
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Default RE: Kit built 4*40 control throws questions.

Carrell, I could be wrong, but I'm pretty sure your drawing is for high wing models with the servo mounted upside-down under the wing. For a low-wing model like the 4*40 the pushrods should connect behind the centerline of the servo output shaft. That is assuming you want more up travel and less down travel.

David

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