[NSRCA-discussion] Help: Servo pins pulled out of connector body
jivey61 at bellsouth.net
jivey61 at bellsouth.net
Sun Mar 19 17:32:43 AKST 2006
Something not mentioned yet.......
If you solder the wires to the pins,more than likely you will also solder the latch strip that holds the pin in the plug,and the pin won't stay in the plug. The latch strip is on the opposite side from the crimp. Solder is not a good idea on the pins.
Soldering pins into a cup on the rear of a pin is an art. In the "60's to pass the NASA soldering school you had to be able to make a 50 pin soldered plug with no more than 10% wicked wires.The solder cannot leave the pot(wick) that the wire is in. Done correctly the wire won't break due to vibration. Todays production aircraft do use crimped pins in the plugs. They are quicker and safer from breaking due to vibration.
my 2c
Jim Ivey
----- Original Message -----
From: Bob Richards
To: NSRCA Mailing List
Sent: Saturday, March 18, 2006 5:45 PM
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
The problem is solder wicking. Solder *can* wick up the wire, and where the solder stops is where vibration can cause the conductors to break.
Having said that, I never had a problem using the old Deans connectors on all my Proline and Ace radios. However, I always used heat shrink tubing to strain relieve the wires.
A properly done crimp is more than sufficient, and I have always heard is more reliable than soldered. I don't, however, have any experience to that effect.
Bob R.
Anne et Xavier <xavier.mouraux at sympatico.ca> wrote:
Full size aircraft don't use soldering I believe. I know we don't at Bombardier. It has so! mething to do with vibration.
Xavier
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell
Sent: March 18, 2006 10:23 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
I disagree with soldering a crimp. If done properly the crimped connection ALONE is the most reliable and durable connection.
John Ferrell
http://DixieNC.US
----- Original Message -----
From: Dennis Bodary
To: NSRCA Mailing List
Sent: Saturday, March 18, 2006 2:28 AM
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
Servo city sells the pins and the connectors for 75 cents to like 2 bucks depending on which ones you want. The crimpers will probably cost you 25 bucks. they are a w crimp. ! you do not want to use regular crimpers. After you crimp them you will want to solder also. use the smallest diameter solder you can find. you just need a tiny tiny amount. you won't be able to use heat shrink due to the heat shrink not fitting in the connector.
paul <paul.horan at sbcglobal.net> wrote:
Ed,
I have not pulled the servos apart to check the gears. The reason I think they are ok is that when the plane went in the engine was dead, the speed was fairly low, the the smaller branches of the tree furthe! r reduced the speed and finally the plane hit a fork that cleanly stripped the wings away. The servos, ailerons, linkage all looked good.
Thanks,
Paul
----- Original Message -----
From: Ed Alt
To: NSRCA Mailing List
Sent: Monday, March 13, 2006 9:38 PM
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
Paul:
The soldering trick works fine, as long as you don't get a cold joint. I try to avoid! it only because the area near where the solder stops wicking into the wire tends to be a point of stress concentration for the wire strands, but as long as you extend the heat shrink about 1/4" past the point where the wire gets 'bendy' again, it supports it and prevents the work hardening of the wire from becoming a problem. I might be a bit nervous about those servos though - how do the gears look? I've had incidents where just a tiny sliver of a gear tooth was chipped away and lead to further problems.
Ed
----- Original Message ---! --
From: paul !
To: NSRCA Mailing List
Sent: Monday, March 13, 2006 10:29 PM
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
Ed,
Sounds like I can either get the kit and crimper from Maxx or cut the connector ends off defunct servos / extentions and solder them to the existing servo wires - using heat shrink to keep any flexing away from the solder joints. Any preference ?
Thanks,
Paul
----- Original Message -----
From: Ed Alt
To: NSRCA Mailing List
Sent: Monday, March 13, 2006 9:24 PM
Subject: Re: [NSRCA-discussion] Help: Servo pins pulled out of connector body
Paul:
Better off to replace the entire connector and pins. Most likely the plastic housing was damaged from the pin pulling out. Also, the! wire had to get strained where it is clasped by the crimp pins. Maxx Products sells connector kits, but you need a crimper tool.
Ed
----- Original Message -----
From: paul
To: NSRCA Mailing List
Sent: Monday, March 13, 2006 10:13 PM
Subject: [NSRCA-discussion] Help: Servo pins pulled out of connector body
I strained my Meridian through a tree, wrecked the plane but the equipment appears OK with the exception of both aileron servo! s. When the wings came off the servo connector body stayed in the fuse and the servos wires and pins went with the wings.
My question is : can I simply re-insert the servo pins in another connector body (taken from defuct servos or extentions) ?
Thanks,
Paul
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