Elevator & Rudder r...
 
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Elevator & Rudder rubbing while on ground

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Timothy
(@jr-lilly8gmail-com)
Posts: 4
New Member
Topic starter
 

Just purchased a 1947 Stinson 108-2. Had a couple of questions as i am learning the airframe and some of its unique characteristics. I noticed that while performing Free, Full, & Correct flight control movement checks the Elevator and rudder hit each other on the rear rudder position light housing. Nothing abnormal was noticed. Travels & Stops were okay. Is there a SB or something that addresses this issue, is this normal on this airframe? 

 
Posted : 12/03/2022 7:27 pm
Carsten H. Hauge
(@carl)
Posts: 129
Estimable Member
 

Not normal. Something is tweaked.

 
Posted : 12/03/2022 7:45 pm
resto108
Posts: 282
Reputable Member
 

What are you basing "Travels and Stops OK" on? The rudder Travel shouldn't get anywhere near the elevators. Thats controlled by the Stops. The rudder should move 19 degrees left and right. Sounds like you need to measure yours. 4.9" each way measured at the trailing edge at neutral elevators if you don't have an angle finder.

 
Posted : 13/03/2022 11:29 am
Timothy
(@jr-lilly8gmail-com)
Posts: 4
New Member
Topic starter
 

@resto108 I'll double check that today, and let you know. It basically only makes contact with the elevator full up and the rudder fully deflected Right. I appreciate the help. 

 
Posted : 13/03/2022 4:24 pm
Glen L'Heureux L'Heureux
(@n168c)
Posts: 20
Eminent Member
 

Additionally, there's a notch in the corner of the trim tab that is put there for a reason; clearance for the rudder light fairing.

It appears that Piper changed the drawing somewhere 'round 1950, eliminating the notch.

As a result, there are a few out there that don't have that clearance.

I think Univair has corrected that now, but it's worth a quick look.

 
Posted : 14/03/2022 6:43 pm
Timothy
(@jr-lilly8gmail-com)
Posts: 4
New Member
Topic starter
 

@n168c Thank you Glen, i appreciate the help. 

 
Posted : 30/05/2022 9:40 pm
Glen L'Heureux L'Heureux
(@n168c)
Posts: 20
Eminent Member
 

Thanks. The folks at Univair were great to collaborate. I imagine that the error has been corrected, though I haven't checked. I have a corrected trim tab from them that remains uninstalled as a result of medical issues providing me an infinite conundrum of excuses.

We shall remain steadfast.

-g

 
Posted : 31/05/2022 3:39 pm
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