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  #1  
Old 01-13-2020, 08:20 AM
1bigdog 1bigdog is offline
 
Join Date: Jun 2014
Location: Markham, Ontario, Canada
Posts: 220
Default Trim cable sanity check RV-9A

I about to order a new elevator trim cable (manual trim) to embed in the center console. I just want to make sure I am seeing things correctly.

Rotating the trim knob clockwise appears to result in nose up, counter clockwise nose down. Correct???
Seems counter-intuitive. I was thinking of having the mechanism reversed since I'm making a new one.

I have only used trim wheels and electric. Is my thinking off?

Thanks for your insight
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  #2  
Old 01-13-2020, 08:25 AM
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Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Quote:
Originally Posted by 1bigdog View Post

Rotating the trim knob clockwise appears to result in nose up, counter clockwise nose down. Correct???
Seems counter-intuitive. I was thinking of having the mechanism reversed since I'm making a new one.
I have only used trim wheels and electric. Is my thinking off?
Thanks for your insight
No, you are not correct. Rotating the knob clockwise raises the tab, which pushes the elevator down, thereby pushing the nose down. Believe it or not almost half of the new aircraft that I inspect has the pitch trim backwards. Of course with manual trim, this is highly unlikely.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
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  #3  
Old 01-13-2020, 08:30 AM
1bigdog 1bigdog is offline
 
Join Date: Jun 2014
Location: Markham, Ontario, Canada
Posts: 220
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Quote:
Originally Posted by Mel View Post
No, you are not correct. Rotating the knob clockwise raises the tab, which pushes the elevator down, thereby pushing the nose down. Believe it or not almost half of the new aircraft that I inspect has the pitch trim backwards. Of course with manual trim, this is highly unlikely.
Hi Mel

Greatly appreciated.
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