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  #11  
Old 08-12-2017, 11:28 AM
brad walton brad walton is offline
 
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I would not reject an entire airplane based on this single photo. Seems harsh to me
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  #12  
Old 08-12-2017, 11:58 AM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by BillL View Post
...

edit-this trim servo is located farther inboard than my 7. I has a foot on both sides of the pivot lever riveted to the trim tab. Is this all wrong or is it a different design on other RV models?
That probably started with the Pre-Punched versions of the tail kits.

I still think this is a -6 that was built before the pre-punched (PP) stuff came out.

The original trim tab horn was completely different. Stolen pic of a early RV-6 after a minor repair -



You will notice this horn location puts the control rod/cable further inboard than the current designs.


I also think instant rejection is a bit harsh, but a full detailed inspection of the rest of the aircraft would be warranted.
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Half completed RV-10 QB purchased
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Last edited by az_gila : 08-12-2017 at 12:01 PM.
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  #13  
Old 09-05-2017, 06:52 AM
ALagonia ALagonia is offline
 
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This seems like the place to post my question. I am not a builder but am looking to purchase a 7A or 6A. I have thousands of hours in certified airplanes but am new to Experimentals. How does one identify a quality build? When I find the airplane I think I want I will definitely have a pre buy by a multiple RV builder but I would like some advice on what I should be looking at before I make an offer contingent upon a successful pre buy inspection.
Thank you for any advice you can offer to this RV soon to be owner.
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  #14  
Old 09-05-2017, 10:02 AM
alpinelakespilot2000 alpinelakespilot2000 is offline
 
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Quote:
Originally Posted by RV6_flyer View Post
That is the FIRST thing that I see.
Is the clevis plastic? If so, what purpose would a jam nut serve?

If I recall correctly, no jam nut is called for here per plans, but it's been a while so I could be wrong..
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  #15  
Old 09-05-2017, 10:08 AM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by alpinelakespilot2000 View Post
Is the clevis plastic? If so, what purpose would a jam nut serve?

If I recall correctly, no jam nut is called for here per plans, but it's been a while so I could be wrong..
Not on the plans, but in the servo manufacturer's instructions - see post #8

http://www.vansairforce.com/communit...06&postcount=8
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EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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  #16  
Old 09-05-2017, 10:26 AM
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Quote:
Originally Posted by ALagonia View Post
This seems like the place to post my question. I am not a builder but am looking to purchase a 7A or 6A. I have thousands of hours in certified airplanes but am new to Experimentals. How does one identify a quality build? When I find the airplane I think I want I will definitely have a pre buy by a multiple RV builder but I would like some advice on what I should be looking at before I make an offer contingent upon a successful pre buy inspection.
Thank you for any advice you can offer to this RV soon to be owner.
An EXPERIMENTAL does not need to meet the build standards or techniques that are used on Certificated airplanes.

A good EXPERIMENTAL build will meet the build standards and techniques used on a Certificated airplane.

Attention to details is important. Some builders just build without attention to detail. What is the BEST way to do something is important. IMHO, the cheapest way of doing something may be the best but sometimes it may be the worst.
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  #17  
Old 09-05-2017, 10:42 AM
Bill Boyd Bill Boyd is online now
 
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Entire airplane is likely to need time and labor-intensive cut-and-buff if the rest of the paint surface is like what we're seeing here. Rejection warranted.



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  #18  
Old 09-05-2017, 10:57 AM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by Bill Boyd View Post
Entire airplane is likely to need time and labor-intensive cut-and-buff if the rest of the paint surface is like what we're seeing here. Rejection warranted.

Nah, poor paint is simply a cost negotiating issue, and the picture is of a lower surface. We don't know what the rest looks like.

A thick, smooth pretty paint job also has the ability to cover up a lot of sins...
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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  #19  
Old 09-05-2017, 03:42 PM
alpinelakespilot2000 alpinelakespilot2000 is offline
 
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Quote:
Originally Posted by az_gila View Post
Not on the plans, but in the servo manufacturer's instructions - see post #8

http://www.vansairforce.com/communit...06&postcount=8
That's interesting Gil.

Vans drawings for the manual trim cable (which is what I have) also omit a jam nut, without any other manufacturer instructions to override vans drawings.

The drawings in the Ray Allen instructions only appear to show one jam nut (not one on both ends of the pushrod)--not sure I would be comfortable basing my installation on these instructions alone.

Finally, I'm still curious what purpose a jam nut against a nylon clevis serves. It couldn't be torqued anyway.

Might have to recheck with vans. I'm pretty sure I did during the initial build but couldn't find any documentation confirming that.
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Last edited by alpinelakespilot2000 : 09-05-2017 at 03:46 PM.
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  #20  
Old 09-05-2017, 04:18 PM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by alpinelakespilot2000 View Post
That's interesting Gil.
......

Finally, I'm still curious what purpose a jam nut against a nylon clevis serves. It couldn't be torqued anyway.

.....
Perhaps the whole nylon clevis acts like the nylon insert portion in a lock nut and is tight enough on the threads to prevent rotation?
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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