Beginners Beginners in RC start here for help.

Twisted tail on foam corvalis

Reply
Old 03-01-2012, 05:23 PM
  #1
guver
Thread Starter
 
Join Date: Mar 2003
Location: LaGrange, OH
Posts: 14,857
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Twisted tail on foam corvalis

The back is twisted a lot as far as I'm concerned , but I don't know if it will be a big problem. I wouldn't know how to fix if I had to anyways. I just put this together and see that it is much worse than any of my other planes. I do have the skyfly max that the vertical fin is not even close to 90 degrees and it flies just fine (the elevator is level)

Here's a pic so you can see just how bad it is? How would I fix this anyways? How will it act in the air if I leave it? I'm guessing the whole rear is twisted 3 degrees or so and the wings seems level with the fuse.


BEFORE AND AFTER PICS
Attached Thumbnails
Click image for larger version

Name:	Db85333.jpg
Views:	16
Size:	125.1 KB
ID:	1734153   Click image for larger version

Name:	Qw93044.jpg
Views:	14
Size:	112.2 KB
ID:	1734154  
guver is offline  
Reply With Quote
Old 03-02-2012, 08:24 AM
  #2
levram1
 
Join Date: May 2011
Location: Corbin, KY
Posts: 258
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

If it were me, I would send it back.
levram1 is offline  
Reply With Quote
Old 03-02-2012, 02:42 PM
  #3
guver
Thread Starter
 
Join Date: Mar 2003
Location: LaGrange, OH
Posts: 14,857
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

Ahh, it's too late. It was a used deal "as is" and I didn't even see it until I had it together. I wish I'd seen it sooner so I could've fixed it.
guver is offline  
Reply With Quote
Old 03-02-2012, 09:13 PM
  #4
tacx
 
tacx's Avatar
 
Join Date: Apr 2009
Location: washington twp., MI
Posts: 890
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

Hold the tail section, where the stabalizer and rudder join the fuselage at the rear, over a pot of boiling water and let the steam heat that area up real good. Then twist the fuse to get the surfaces lined up and hold it there til it cools.
tacx is offline  
Reply With Quote
Old 03-02-2012, 10:00 PM
  #5
cutaway
 
Join Date: Jun 2007
Location: Lake Worth, FL
Posts: 1,009
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

Its not a fatal flaw - it will fly like that, but wouldn't track true through thing like loops and 8's and will probably have a slight bias favoring one turn direction.
cutaway is offline  
Reply With Quote
Old 03-03-2012, 05:30 AM
  #6
CGRetired
Moderator
 
CGRetired's Avatar
 
Join Date: Sep 2004
Location: Galloway, NJ
Posts: 8,999
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

I had a glow ARF that I put together several years ago. When I put the horizontal stab on, glued it in place, then went to bed to let it set. During the night, it settled so that it was "tilted" to the left. I saw a paw print on the left side.. looked like the cat had walked on it as the epoxy was setting up and stayed that way once it was set.

It flew just fine.. as cutaway said, it tracked slightly irrregularly but it flew fine.

CGr.
CGRetired is offline  
Reply With Quote
Old 03-03-2012, 07:07 AM
  #7
levram1
 
Join Date: May 2011
Location: Corbin, KY
Posts: 258
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

One less cat??
levram1 is offline  
Reply With Quote
Old 03-03-2012, 12:22 PM
  #8
guver
Thread Starter
 
Join Date: Mar 2003
Location: LaGrange, OH
Posts: 14,857
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

Quote:
ORIGINAL: tacx

Hold the tail section, where the stabalizer and rudder join the fuselage at the rear, over a pot of boiling water and let the steam heat that area up real good. Then twist the fuse to get the surfaces lined up and hold it there til it cools.

After reading all of these good responses I was going to go ahead and fly it. This repair didn't sound too hard though so I tried it once without any results.

The second and third time I did it I was able to correct over half the problem. I think I was just not getting enough steam to it at first. Second time I allowed it to relax too much before a good cool. The third time did really nice. It not only had to twist , but had to be "steered" a bit too. It was a natural bend in that the more I twisted it the more it steered into place nicely. I might even do it again to get it perfect. I had the best luck with a water boiling pot with a 1/2" spout.

Patience (heating and cooling) was key in getting it to work and after doing it , it really is easy. A jig would be nice I suppose.

Thanks , guys for the help. Now if I crash it I can't blame it on the plane, right?
guver is offline  
Reply With Quote
Old 03-03-2012, 02:28 PM
  #9
CGRetired
Moderator
 
CGRetired's Avatar
 
Join Date: Sep 2004
Location: Galloway, NJ
Posts: 8,999
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis


Quote:
ORIGINAL: levram1

One less cat??

No, one crooked tail.
CGRetired is offline  
Reply With Quote
Old 05-11-2012, 05:40 PM
  #10
guver
Thread Starter
 
Join Date: Mar 2003
Location: LaGrange, OH
Posts: 14,857
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Twisted tail on foam corvalis

This turned out to be not so nice flying plane. It's probably not because of the twist necessarily. Here's how it trims out for staying level , but it continuously wants to roll to either/both sides. All The control surfaces aren't very strong and bend and warp easily. I seem to have a hard time with it because it is constant work (correcting) to make it fly. Flying inverted is pretty hard because it still wants to roll , but the worst thing I don't like is that when doing a roll the nose drops a bunch until inverted. Maybe a character of this rounded short fuse?

Yes, I'm complaining. [:'(] I will continue to fly it though and perhaps I will grow to like it soon. []

This is one that I'd take to the field and have someone else take it up and look it over. The flaps seem pretty level , but the ailerons are off quite a lot. Worst plane I have I think. Maybe I will check the lateral balance because I've never balanced any of mine before.
Attached Thumbnails
Click image for larger version

Name:	Us54194.jpg
Views:	13
Size:	72.5 KB
ID:	1761655   Click image for larger version

Name:	Ne56248.jpg
Views:	12
Size:	88.7 KB
ID:	1761656   Click image for larger version

Name:	Rm36730.jpg
Views:	12
Size:	93.0 KB
ID:	1761657   Click image for larger version

Name:	Gi82912.jpg
Views:	15
Size:	101.3 KB
ID:	1761658  
guver is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 11:02 AM.