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Second Test Flight Some Bumps In The Road

Crafting N112DR

Well Known Member
My second test flight was another success, Yes there were some issues again with the ADAHRS, and my right wing heavy got heavier. But I did got the trim indication dialed in. It's Phase I there are going to be bumps in the road. :(

Here are all the Videos:

Edited Short Version
https://youtu.be/FfrSL4bfT6E

Tail 360 Full flight (will work best on your phone or iPad)
https://youtu.be/s37mm0L2I9k

Full Flight
https://youtu.be/kYObV6e-UHI
 
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David,

Congratulations on getting your bird in the air!!!

As for the heavy wing .... I too had a heavy wing and easily solved it before getting draconian with the aft edge of the flaperons. Based on the advice of another builder (from Kentucky I believe), I checked the aft edge of the wing skins and found my issue. I'm talking about the aft portion of the wing skins that are cantilevered over the rear spar.

Before making any "adjustments" to the flaperons, give the following a try ... it solved my heavy wing issue. Use a straight edge and take measurements every few inches, tweaking the wing skin up or down as necessary so the wing skin aft of the rear spar is on the same plane as the wing skin forward of the rear spar. Below is a link to my blog with photos.

http://www.dogaviation.com/2016/11/what-to-do-about-heavy-wing.html

Once you know the wing skins are totally flat, you can move onto other solutions if the above procedure does not solve your heavy wing issue ... but at least you will know the wing skins are not contributing to the heavy wing.

Hope that helps ... it sure helped on my bird.

Happy flying,
 
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When it comes to dealing with roll trim issues, there are numerous things that can cause an imbalance.

All of them should be considered because often times it is a combination of at least a couple of them that is causing the issue.

At other times, one of the issues may be present on both ailerons (or in the case of the RV-12, flapperons) which then causes a different issue that a novince RV flier may not recognize, such as excessively light aileron forces.

On the RV-12, there are 3 known causes of a roll trim imbalance, and all three are builder/workmanship related so they should all be considered to potentially exist on any RV-12.

They are
- Trailing edge shape of flapperons (can cause a control sensitivity issue even if not causing a roll trim imbalance)

- Shape of wing skin trailing edge

- Elevation of the flapperon. Particularly at the outboard end. This is influenced by the amount of insertion of the hinge rod ends.

In some cases it might be possible to adjust one cause to entirely solve the problem, but leave another that was the primary problem, unchanged.
 
man! How many camera's did you hung up that bird anyway? Must've been a complete studio, didn't it? However: fantastic pics which I could only provide by several different flights.
Glad for you she flies so well, despite a heavy wing. Did you check the 'fold' of the flaperon, and the run of the upper plates touching the flaperons?
 
Just 3 cameras,
2 GoPro Hero 5 black's (cockpit)
1 GoPro Fusion 360 (tail)

Working on Scotts 3 suggestions:

-Trailing edge shape

-Shape of wing skin trailing edge

-Elevation of the flapperon
 
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