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  #1  
Old 05-24-2021, 07:33 AM
bob865 bob865 is offline
 
Join Date: Feb 2021
Location: Greenville, SC
Posts: 8
Default R-716 Fairing Attachment at the bottom of the rudder.

Made my first glaring mistake on the plane that I'm not sure how to fix. I'm working on the rudder and has to fabricate the R-716 rudder bottom attach strips. Well I measured wrong and they are about two inches too short. The problem is I don't have enough material left to fabricate new ones of the right length. I know I can order more, but looking at what these attach strips do, I think I can make it work. I cut the fabricated ones so that the end fell between two rivets and cut an additional piece to fill in the difference. Pics are attached. I need to deburr and clean it up, but the idea is circled in the pic.

Asking the more experienced Vans community....Do you agree with my assessment?
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RV8A- Status:
Empennage Kit: In work (45%-ish)
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  #2  
Old 05-24-2021, 02:20 PM
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Jonnyb Jonnyb is offline
 
Join Date: Jan 2013
Location: UK
Posts: 71
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Given how early you are in the build, and how easy and cheap the part is to replace, why even bother trying to fix it? Order some more Aluminium, and add that stuff to your pile of scrap material for later use.

You could probably make some more from the trim bundle that’s included with the empennage kit. I’m not sure if it’s long enough, but it’s worth checking.
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  #3  
Old 05-24-2021, 05:41 PM
Girraf Girraf is offline
 
Join Date: Dec 2017
Location: Southern Maryland
Posts: 189
Default

Sure it may be a little early in the build to be satisfied with a minor mistake like that, but given that its job is to hold a fairing, I think your solution is fine. You could even take another step and make a doubler to span across the gap and tie the two pieces together but that's probably overkill.
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  #4  
Old 05-24-2021, 06:03 PM
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wirejock wirejock is online now
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,546
Default Scrap parts

I think it would probably be fine too, but why not borrow some scrap from a local builder and re-doo?
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Donated 01/01/2021, plus a little extra.
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  #5  
Old 05-24-2021, 08:17 PM
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pilotkms pilotkms is offline
 
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Location: WARNER ROBINS, GA
Posts: 501
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Do what Johnyb says. You’re gonna make a lot more mistakes. Get ready for them.
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  #6  
Old 05-24-2021, 08:58 PM
ScottK ScottK is offline
 
Join Date: Feb 2007
Location: SLC, UT
Posts: 45
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Based on messing up the same parts on my rudder, and for the job they do, I think you'd be fine with your patch. But I am not an engineer. I also think I didn't want to set the tone for my build that way, and spent less than $10 for new metal to remake them correctly (spoiler, I have a local supply house).
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  #7  
Old 05-24-2021, 09:07 PM
Mikeyb Mikeyb is offline
 
Join Date: Nov 2018
Location: Pasadena ca
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I looked at your kit log. You are moving right along. These are the type of “what’s good enough” questions you are going to have to make all the time.
Good luck!
Mike
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  #8  
Old 05-25-2021, 10:26 AM
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HAL Pilot HAL Pilot is offline
 
Join Date: Nov 2015
Location: Las Vegas NV
Posts: 279
Default

Van's support is usually pretty quick on answering questions like this.

support@vansaircraft.com

Don't be shy. :-)
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  #9  
Old 05-25-2021, 03:30 PM
PhatRV PhatRV is offline
 
Join Date: Mar 2018
Location: Buena Park, California
Posts: 532
Default

Quote:
Originally Posted by bob865 View Post
Made my first glaring mistake on the plane that I'm not sure how to fix. I'm working on the rudder and has to fabricate the R-716 rudder bottom attach strips. Well I measured wrong and they are about two inches too short. The problem is I don't have enough material left to fabricate new ones of the right length. I know I can order more, but looking at what these attach strips do, I think I can make it work. I cut the fabricated ones so that the end fell between two rivets and cut an additional piece to fill in the difference. Pics are attached. I need to deburr and clean it up, but the idea is circled in the pic.

Asking the more experienced Vans community....Do you agree with my assessment?
I found that I had to purchase extra aluminum sheets in 0.032" and 0.025" from Aircraft Spruce to fix mistakes like this. They also come handy at the later stage of your build when you need to build parts that are different than in the plan, such as avionic shelf.
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  #10  
Old 05-25-2021, 04:39 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,409
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I suggest you leave it as is for now and continue on. Order in a bit of .025 & .032 sheet as is always nice to a bit extra. Come back to it & the fairing later when you have decided what type of tail lamp you will be mounting in the fairing, as you will find that you have to trim the rear end of those strips to make room for the tail lamp/strobe housing.
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