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  #1  
Old 03-17-2019, 03:45 PM
ATango ATango is offline
 
Join Date: Dec 2017
Location: Mojave, CA
Posts: 19
Default Carbon Fiber Rudder

I've been working on making a carbon fiber rudder (RV-8 drop-in replacement) for a little while now and finally have a little bit of progress to share. I just fabricated the skins this past week while I was home from school for spring break. This project is primarily for my own education with designing/fabricating composite parts, and I'm quite happy with how the skins came out. The look is a bit different than the stock RV-8 rudder, with some influences from the GB1 Gamebird.

I'll try to include some pictures on here, but I have a lot more pictures and a fairly detailed write up on my website: https://sites.google.com/view/adamav...der?authuser=0

Let me know what you think!




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Last edited by ATango : 03-17-2019 at 04:18 PM.
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  #2  
Old 03-17-2019, 04:40 PM
Dustyone Dustyone is offline
 
Join Date: Oct 2012
Location: Brisbane,Austalia
Posts: 211
Default Awesome project

Hi Adam,

What a great project to learn about design and manufacturing .

Liked the new shape of the trailing edge.

Great write up on your website.

Cheers,
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  #3  
Old 03-17-2019, 05:40 PM
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Mark33 Mark33 is offline
 
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Location: Baton Rouge, La.
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Default

Wow...that looks really nice!! I?m sure you could sell a lot of those if you ever decided to produce them.
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  #4  
Old 03-17-2019, 06:27 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Default

Don't forget to flutter-qualify it!

And since the area looks reduced, be sure to run it through the full set of lateral-directional stability and control tests.

Dave
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  #5  
Old 03-17-2019, 06:57 PM
ATango ATango is offline
 
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Location: Mojave, CA
Posts: 19
Default

Ashley and Mark: Glad you guys like it. The mold is still in great condition due to many hours or prep time.. additional rudders may be something I would consider a bit in the future, but this one is for education and validation.

Dave: The area of the rudder is nearly identical to the stock RV-8 rudder. The rudder will be counter-balanced as well. When it comes time, flight test will be taken seriously. Thanks for your concern!
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  #6  
Old 03-17-2019, 07:29 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,320
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Nice!! Are you going to bond real ribs in there for stiffness? Any projection on a weight comparison with the stock 8 rudder?
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  #7  
Old 03-17-2019, 07:36 PM
ATango ATango is offline
 
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Location: Mojave, CA
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Default

Quote:
Originally Posted by BillL View Post
Nice!! Are you going to bond real ribs in there for stiffness? Any projection on a weight comparison with the stock 8 rudder?
Bill, a spar and ribs (all carbon fiber) will be bonded into the structure. I do not have a precise weight estimate yet, but it will not be any heavier than the stock rudder. I am using fairly high factors of safety and over-engineering it a bit, so it will not be quite as light as it could be.
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  #8  
Old 03-17-2019, 07:53 PM
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N941WR N941WR is offline
 
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Location: SC
Posts: 12,887
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That looks cool!

My only comment is that there isn't a fitting for the rear light.

Can you make the entire trailing edge a combination position and strobe light with LED's?
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  #9  
Old 03-17-2019, 07:56 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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How does the torsional stiffness compare to the stock one?

Dave
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  #10  
Old 03-17-2019, 09:29 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 209
Default Boiler Up !!

Knew he must be a Purdue student !!!!
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RV-14A QB building, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Parts became a real airplane 8/15/2020.
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