 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25704
Location: Livermore CA USA
|
 Posted: Fri Apr 01, 2011 8:33 am Post subject: Heavy Right Wing... (Additional Thoughts) |
 |
|
After a good night's rest I got to thinking about these most recent observations. Dropping the RIGHT aileron a 1/16" caused the trim requirement at high speed to go from the previous full-LEFT to a full-RIGHT setting. Wouldn't this imply that now the LEFT aileron needs a similar adjustment perhaps? Maybe only a 1/32" on the left side? Seems that if a given aileron that was too HIGH was dropped too much it would still cause the same drag/trim problem if its too LOW? So the fact that now my trim is completely the opposite implies that the RIGHT aileron is probably now exactly on and moreover, it was TWICE as much too high as the LEFT aileron still is.
Does any of this make sense?
-
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 160+ Hours TTSN - Paint job is all that's left...
At 08:47 PM 3/31/2011 Thursday, you wrote:
| Quote: |
Thanks to everyone for the great feedback on this issue!!
I went out after work tonight and had a look at the aileron alignment and sure enough, the outboard edge of the right aileron was high by about 1/16-3/32 of an inch. I took the hinge off the aileron and elongated the holes slightly and reassembled, dropping the outboard side by about 1/16". I went out and took it up to about 220mph and now - are you ready for this - it requires full RIGHT trim! Completely the opposite from before. So, obviously I need to reduce the drop by 50% and I should be dead-on neutral trim! Its amazing to me how such a little movement had such a HUGE impact on the trim. No, aileron edge smooshing necessary, by the way! Whew!
Best,
-
Matt Dralle
At 09:10 AM 3/31/2011 Thursday, Matt Dralle wrote:
>
>Dear Listers,
>
>Well, taking the RV-8 in for paint is getting closer and closer and I'm trying to get all the little things that need doing done before then. Dealing with the heavy right wing is the next thing on the list. Currently, at low speed I have about neutral aileron trim. The faster I go, the more LEFT trim I need. Above 200mph, I run out of left trim and the left aileron is noticeably "up", maybe .125" or so. Both of my ailerons are "chubby" at the trailing edge. I wanted to confirm with the List that "squeezing" the RIGHT aileron will add a bit of lift on the RIGHT side and hopefully neutralize the issue?
>
>Thanks!
>
>Matt
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
|
_________________
Matt Dralle
Matronics Email List Administrator |
|
| Back to top |
|
 |
recapen(at)earthlink.net
Guest
|
| Posted: Fri Apr 01, 2011 9:13 am Post subject: Heavy Right Wing... (Additional Thoughts) |
|
|
Makes sense for the same reasons as the original......
Measure the other side - adjust if necessary...if it's not out of rig, you need to look elsewhere.....
My .02...
--
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
|
|
|
| Back to top |
|
|
larywil(at)comcast.net
Guest
|
| Posted: Fri Apr 01, 2011 1:36 pm Post subject: Heavy Right Wing... (Additional Thoughts) |
|
|
Hi Matt,
I want to thank you again for the 'List". I've been on it almost
forever and still look at it everyday to see what's going on and what
I can get or give to others. The list works well. The VAF forum is
probably suitable for many as well. It does get a little complicated
though. What is truly interesting is the way this list has been self
monitoring and self correcting for so many years. Like a good autopilot.
That said, I have compassion for your heavy wing predicament. Check
your other aileron, adjust if needed. I think it won't be a final
answer ( just thinking, not predicting). Now, remember you are still
working with many variables. some can be disregarded. Others are
essential. I have found on several occasions with -4's that the first
place to start is "yaw". Does your baby fly with the ball centered in
the area between ~160 - to - 210 mph? If you don't pay strict
attention to the ball in hands off flight, you may think your wing is heavy.
Next. did your remove the main gear fairings recently? I' don't know
how the -8 works, but the fairings on the -4 have to be aligned
perfectly and should have index marks applied to the gear leg and
the fairing tabs. Even a little bit of misalignment knocks off the
yaw. I was chasing a heavy wing problem for several months by
squeezing and trim tabbing. I couldn't solve my problem. I read on
the list that adjustment to those two huge rudders under my legs can
cause all sorts of trim problems. A minor repair to my left gear
fairing left it with a small twist. When I replaced the fairing and
indexed it to the previous index marks, I assumed it was good-to-go.
Wrong! the little bit of twist screwed up the aerodynamic balance of
the aircraft. I don't know exactly why this manifested itself in a
"heavy wing" condition, but a small adjustment in the alignment of
the gear leg fairing immediately fixed my problem. Good luck.
Louis
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
