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All Forums >> RC Airplanes >> Questions and Answers >> Z-bend
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Z-bend - 4/21/2002 10:56:29 PM   
FCC


 

Posts: 176
Joined: 1/17/2002
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Status: offline 		What is the best way to make a z bend without expensive tools?
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Z-bend - 4/22/2002 1:26:32 AM   
rvd



Posts: 398
Joined: 2/7/2002
From: CA
Status: offline 		Well once you have your spots marked where they have to be bent, you can do it with pliers if you are good or you can use a vise. Insert the rod in the vise right before the mark you made on the rod that lines up with the hold on the servo horn, then bend it to a 90 degree bend. make sure you bend the rod as close to the vise as possible when you bend so the 90 is a clean 90 not a rounded bend.. then simply do the same step for the last bend. always grab the rod as close to the vise as you can.

(in reply to FCC)
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Z Bend tool not expensive - 4/22/2002 2:12:36 AM   
Birddog-RCU



Posts: 1137
Joined: 1/4/2002
From: Saratoga Springs, UT, USA
Status: offline 		If you are going to be making many Z bends, it pays to buy pliers made specifically for Z bending. They run around $17 US and are well worth it. And... they work!


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Saratoga Springs, UT
Club Member: Utah Valley Aeromodelers

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Du-Bro's # 1 - 4/22/2002 6:28:50 AM   
tailskid



Posts: 5509
Joined: 11/30/2001
From: Tolleson, AZ, USA
Status: offline 		I think I've tried them all ( "Z-Bending" tools, and if you are using 2-56 sized rods, the Du-Bro bender is by far the best, with the Great Planes version coming in a close second. Third place is so far away - wayyyyyy back -

Jerry

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Z-bend - 4/22/2002 7:38:12 PM   
glowplug



Posts: 1862
Joined: 2/2/2002
From: Weirton, WV, USA
Status: offline 		If you don't have Z-bend pliers, try a "U" bend..... A guy that I bought a Tiger 2 off of had the pushrods bent this way, they work very well....I've been using U bends ever since.

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       Post #: 5

U-bend - 4/22/2002 9:23:07 PM   
Birddog-RCU



Posts: 1137
Joined: 1/4/2002
From: Saratoga Springs, UT, USA
Status: offline 		That's a cool idea! I'm going to try that also. A good field repair idea just in case you need to fix a connection and don't have the Z-bend pliers.

< Message edited by Birddog-RCU -- Apr 24 2002 6:43PM >


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Saratoga Springs, UT
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Z-bend - 4/24/2002 9:17:55 AM   
wbrian



Posts: 125
Joined: 2/9/2002
From: Satellite Beach, FL, USA
Status: offline 		FYI --- U bend is not new! It’s partly why Z bend was developed. U bend by its nature has some slop that can cause flutter on some planes. It’s also really bad in high torque situations

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New? - 4/24/2002 11:01:29 AM   
Birddog-RCU



Posts: 1137
Joined: 1/4/2002
From: Saratoga Springs, UT, USA
Status: offline 		It was new to me and sounds like a great field fix idea. I don't care about high torque as I don't fly those types of planes. I consider it a good idea even if it is old.


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Saratoga Springs, UT
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Z-bend - 4/24/2002 5:47:41 PM   
Ed Smith


 

Posts: 2837
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		The 'U' bend is a bad idea, originaly and as a quick fix. Why take a chance?

If you can bend a 'U' bend you can make it a 'Z'bend. After the 'U' is bent, twist the short leg 180deg and you have a 'Z' bend.

If you do not wish to buy pliers try this. In the vise make a 90 deg bend. Place the wire back in the vise with the short end sticking up, make another 90 deg bend. Now twist the short end 90 deg forward and you have a vee bend.

That is what I used to do when Iwas too cheap to buy pliers.

Ed S

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       Post #: 9

Re: New? - 4/24/2002 8:42:25 PM   
wbrian



Posts: 125
Joined: 2/9/2002
From: Satellite Beach, FL, USA
Status: offline 		[QUOTE]Originally posted by Birddog
It was new to me and sounds like a great field fix idea. I don't care about high torque as I don't fly those types of planes. I consider it a good idea even if it is old. [/QUOTE]

Good point Birddog --- I'm converted

see-ya at the crash corner

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Z-bend - 4/24/2002 9:01:59 PM   
glowplug



Posts: 1862
Joined: 2/2/2002
From: Weirton, WV, USA
Status: offline 		If the U-bend is tight enough, there is absolutely no slop.

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U-bend - 4/24/2002 9:12:14 PM   
Birddog-RCU



Posts: 1137
Joined: 1/4/2002
From: Saratoga Springs, UT, USA
Status: offline 		As I stated, it seems to me to be a good "field fix". I don't often take a vise out to the field and the pliers I have in my field box are not heavy duty. If it gets me back in the air AND is safe, I'll try it and use it. I will however build with the Z-bend because I have the right tools in my shop to do so.

< Message edited by Birddog-RCU -- Apr 24 2002 6:39PM >


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Saratoga Springs, UT
Club Member: Utah Valley Aeromodelers

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Z-bend - 4/24/2002 11:16:21 PM   
wbrian



Posts: 125
Joined: 2/9/2002
From: Satellite Beach, FL, USA
Status: offline 		Birddog
Most sensible people would consider flutter and loose controls to be dangerous. And although Glowplugs comment “If the U-bend is tight enough, there is absolutely no slop” is true, it does not take into account what happens to a control rod when you bend it that far back (it will break).

Guys keep thinking outside the box – just don’t fly next to me !!!

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Thanks - 4/24/2002 11:45:21 PM   
Birddog-RCU



Posts: 1137
Joined: 1/4/2002
From: Saratoga Springs, UT, USA
Status: offline 		Thanks!

Glad to see you have all the answers. :


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Alan Cluff
Saratoga Springs, UT
Club Member: Utah Valley Aeromodelers

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Z-bend - 4/25/2002 12:15:09 AM   
glowplug



Posts: 1862
Joined: 2/2/2002
From: Weirton, WV, USA
Status: offline 		The guy who's plane I bought that had U-bends on the pushrods has been flying for over 12 years, and flies in a manner that I can only dream......so he's somebody who's opinion I trust....he's never had a problem with any of his U-bends....and has been using them for years.
If a control rod doesn't break when bent a perfect 90 degrees for a Z bend...it won't break with a U bend either. It's a curved bend....not an angle.

Mike

(in reply to FCC)
       Post #: 15
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