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It is currently Sat Jan 20, 2018 11:42 am

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Ryan Allen
PostPosted: Tue Jan 02, 2018 5:47 pm 
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well, that sounds like it should slap right together then!


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Rich Brazell
PostPosted: Tue Jan 02, 2018 9:43 pm 
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If I remember right , it took me about 2 weeks to make and fit all the paper templates . After seeing some other trim strips on other AC I am glad I took the extra time and trouble to get the smooth exact fit . Bing, Bang , Boom ! :P

RB O0


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Ryan Allen
PostPosted: Sun Jan 07, 2018 7:14 pm 
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Drawing 519 says the stick should move forward and aft 15 degrees from vertical. I can not understand drawing 521 to determine how many degrees the stabilator tab should travel based on the max stick fore/aft deflection. I have attached a screen shot of the stabilator tab deflection drawing (#521). Can anyone tell me if my below interpretation is correct?

Here is what I think the drawing is says:
1) when the stick is moved from the vertical position to 15 degrees forward, the stab tab should travel 25 degrees down
2) when the stick is moved from the vertical position to 15 degrees aft, the stab tab should travel 35 degrees up

Attachment:
521.jpeg
521.jpeg [ 385.27 KiB | Viewed 154 times ]


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bfinney
PostPosted: Sun Jan 07, 2018 7:32 pm 
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Ryan,
My take is the stabilator moves 15 deg up and 5 deg down with the neutral point being 5 deg up. The trim tab moves +- 20 deg from the chord of the stabilator. With the stabilator in line with WL 44.0 the trim tab should be 10 deg down.

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Bruce Finney
N18JF T-18C #262
Auburn, WA USA


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Ryan Allen
PostPosted: Mon Jan 08, 2018 7:35 am 
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Bruce, that helps a lot. I was not seeing that one of the arcs was for the chord of the stab. thank you. Also, after sleeping on it, I will not concern myself with the position of the stick while checking the stabilator movement, as I have already determined I have the 15 degrees of fore/aft stick movement as called out in DWG 519.


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fytrplt
PostPosted: Mon Jan 08, 2018 8:24 am 
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Remember, the stops are set at the stick end. I had to grind some off the bolt heads at the sticks to get enough down travel. Up travel is limited by the stop plate.

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Bob Highley
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James Grahn
PostPosted: Mon Jan 08, 2018 11:38 am 
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Bruce is right. Plus 15 and minus 5 from level. The tab moves through plus or minus 20 from those positions ONLY if you include cockpit trim. Set up follows. Level the plane via WL42. Put an incidence meter on the the horizontal and set it 5 degrees leading edge down. The trim should turn 5.5 turns stop to stop. Set the trim in the middle of its range. With the above horizontal position, the tabs should be exactly faired even with the aft edge of the horizontal.
Make sense?
Cubes


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Ryan Allen
PostPosted: Mon Jan 08, 2018 5:46 pm 
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Cubes, that's great info. Thank you all. Even the info about the bolt, because it looks like I might have a very slight bolt interference issue like Bob that was causing me major concern.


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