HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Apr 03, 2008, 06:19 AM
Free as a bird now.
Brian Courtice's Avatar
United States, FL, Punta Gorda
Joined May 2002
6,669 Posts
Help!
Snapped wingrod stuck inside wing tube

I've got a plane that crashed pretty badly, and the hardened steel wing rod snapped in two.

Unfortunately, it snapped about 1 1/2 inches inboard of the left wing root, and now I have about four inches of steel firmly stuck inside the wing tube. I guess the rod bent a little inside the tube before it snapped, so now it is firmly jammed in there.

I tried to stick a drill in through the tube to drill into the end of the broken rod, but the steel is too hard. The drill barely scratched the steel rod. Are there drills hard enough to drill into a steel wing rod? I am hoping I can start a hole, tap a long screw into the hole, and then grab the screw to pull the rod out. Does anyone have a better idea?
Brian Courtice is offline Find More Posts by Brian Courtice
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 03, 2008, 06:35 AM
TEAM OZSKUNKWORX
r/c junkie's Avatar
KORUMBURRA IN THE BOONDOCS
Joined Jan 2006
4,776 Posts
You can use a masonry bit the one with tungstan carbide tip sharpen it as good as you can so it has a cutting edge like a normal drill rotate it at a low speed with a fair bit of pressure it might take a little while but it works very well i have used it to drill out a 50 rockwell hardended tread in an extrusion screw.

Shane:hope this helps
r/c junkie is offline Find More Posts by r/c junkie
Reply With Quote
Old Apr 03, 2008, 07:02 AM
Go fast, turn hard
Tailslide UK's Avatar
Berkshire, England
Joined Aug 2006
1,202 Posts
I too have fought this paticular problem in the past.

If the rod is bent, drilling it will create more problems. When the rod spins, it will drill itself a lip in the brass tube and you will never get it out.

I managed to extract a bent rod by putting a sheet of EPP on my bench and bouncing the root rib flat against it with the wing held vertically. about 200 bounces "walked" the stub of the rod down the tube until it came out.

The one I did not extract (after too many hours) I did this: I heated up the other end of the wingrod with a torch. I then inserted it into the tube with the broken rod. I did this several times until the broken stub and the tube were hot. This softened the epoxy around the tube. I then ran an "easy out" (sort of a tapered left-handed drill bit with raised flutes) into the tube and twisted it until the tube broke loose. I then pulled the tube and the broken stub out leaving a perfectly shaped hole to insert a new tube into.

The model is not by chance a Sig Samuari is it? Both of the above have been Sami's. I found out after the second time that some SST wing rods had gotten into my box. They were real bad about snapping like this. They made a nice sound when they hit the bottom of the trash can!

Hope this helps.
Tailslide UK is offline Find More Posts by Tailslide UK
Reply With Quote
Old Apr 03, 2008, 08:00 AM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,763 Posts
You might try a very strong magnet, and the bouncing method.

Other than that, the heating idea sounds like a winner.

I removed an intact wingrod from a wingeron core that had been give to me accidentally glued into a wing panel by carefully heating it with a Mapp Gas tourch.
Good luck Brian.

T
target is offline Find More Posts by target
Reply With Quote
Old Apr 03, 2008, 08:24 AM
fun is the goal
AndreasMergner's Avatar
USA, NY, Albany
Joined Dec 2003
1,557 Posts
What about using a glue like CA or JB weld to glue something to the rod and pull it out? You would put the glue on the end of whatever you insert (maybe the rod from the other wing half?) so you don't get glue all over the place.

You could also try and push it out from the tip side of the brass tube. You'd have to put a small hole in your wing, but if the plane is "crashed pretty badly" you may be repairing a bunch of other stuff anyway. That might be the quickest, surest method of all of them.
AndreasMergner is offline Find More Posts by AndreasMergner
Reply With Quote
Old Apr 03, 2008, 12:16 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,925 Posts
With glue the risk of it touching the side of the tube and ultimately bonding
the rod to the tube permanently seems pretty high.

I'd probably find the other end of the tube, and drill a small diameter hole into it
at the lowest angle possible, then insert a thin steel rod into
the hole and tap on it with a hammer to try to drive the larger
joiner rod out.

ian
Daemon is online now Find More Posts by Daemon
RCG Plus Member
Old Apr 03, 2008, 12:29 PM
Speedy Tree Surgeon
Tiverton,Devon,UK
Joined May 2006
680 Posts
Try drilling it,then get a small tap and thread the hole.Fit a bolt and pull.

Tim
avago is offline Find More Posts by avago
Reply With Quote
Old Apr 03, 2008, 12:32 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,925 Posts
He said he already tried drilling it.

ian
Daemon is online now Find More Posts by Daemon
RCG Plus Member
Old Apr 03, 2008, 12:33 PM
Yes, ALL your money...
winchdoc's Avatar
A hut in the woods in Oregon
Joined Jan 2003
2,521 Posts
Brian, can you show pix o' shame?
Is it a blingeron install?
winchdoc is offline Find More Posts by winchdoc
Reply With Quote
Old Apr 03, 2008, 12:39 PM
Free as a bird now.
Brian Courtice's Avatar
United States, FL, Punta Gorda
Joined May 2002
6,669 Posts
Thanks guys. The drill and tap method was my first plan, if I can find a hard enough drill. THe rod is probably a little bent, so I doubt I can walk it out by banging on the wing. If I can get the end tapped, I should be able to pull the rod out as apposed to twisting it.

The idea of opening a hole in the bottom of the wing at the tip end of the tube, so I can push the rod out, has also occured to me. That might be easier, but it will require extra wing repairs.

Thanks for the ideas.

The plane was my much beloved CR Contender. It's in fairly rough shape now, after a 300 foot vertical dive into the ground, but I plan to repair and restore it.
Brian Courtice is offline Find More Posts by Brian Courtice
Reply With Quote
Old Apr 03, 2008, 01:01 PM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,763 Posts
Brian-

I think that all the trouble to get the steel rod out of the brass tube might be tougher than just heating, and removing the whole brass tube, as someone mentioned.
Especially if the brass tube is already a little buggered up inside, possibly.

Did you have a radio glitch, or did a servo lock out? Why the dive?

Bummer.
I hope you get it fixed well; I have faith in you!

T
target is offline Find More Posts by target
Reply With Quote
Old Apr 03, 2008, 01:03 PM
If it ain't broke...break it!
Hangtight's Avatar
South Coast, UK
Joined Jun 2006
912 Posts
If you're having trouble drilling it with an HSS bit, you'll have even more trouble trying to tap it And if a tough joiner has bent inside a nice malleable brass tube, chances are the tube is bent too. Maybe pulling the whole thing is the way to go?

Good luck!
Hangtight is offline Find More Posts by Hangtight
Reply With Quote
Old Apr 03, 2008, 01:04 PM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,763 Posts
Great minds think alike?

T
target is offline Find More Posts by target
Reply With Quote
Old Apr 03, 2008, 01:09 PM
If it ain't broke...break it!
Hangtight's Avatar
South Coast, UK
Joined Jun 2006
912 Posts
Yeah...but you type quicker!
Hangtight is offline Find More Posts by Hangtight
Reply With Quote
Old Apr 03, 2008, 01:10 PM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,763 Posts
Brian-

Buy this:

http://www.kjmagnetics.com/proddetail.asp?prod=D4Z0

T
target is offline Find More Posts by target
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
WTB: SS re-inforcement wing tube DrBill Aircraft - Electric - Airplanes (FS/W) 8 Apr 24, 2004 02:17 PM
Question lanier edge wing tube luvtofly Fuel Plane Talk 0 Feb 28, 2004 09:00 PM
rx antenna inside carbon tube? Brian Courtice Slope 11 Jun 28, 2003 11:07 AM
Best place to get a replacement wing tube Bill Germanson Sport Planes 7 Jun 25, 2003 11:36 AM
snapped my lite stick wing Rocksnake2 Parkflyers 2 Jun 06, 2001 12:39 PM