X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m12.lax.untd.com ([64.136.30.75] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with SMTP id 1132234 for flyrotary@lancaironline.net; Mon, 29 May 2006 19:45:10 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.30.75; envelope-from=alwick@juno.com Received: from m12.lax.untd.com (localhost [127.0.0.1]) by m12.lax.untd.com with SMTP id AABCHZB3PAPMRHMJ for (sender ); Mon, 29 May 2006 16:43:41 -0700 (PDT) Received: (from alwick@juno.com) by m12.lax.untd.com (jqueuemail) id LRKXH4DU; Mon, 29 May 2006 16:42:57 PDT To: flyrotary@lancaironline.net Date: Sun, 28 May 2006 18:24:12 -0700 Subject: Re: [FlyRotary] Re: Another case of heat-soaked coils? Message-ID: <20060529.164238.1416.17.alwick@juno.com> X-Mailer: Juno 5.0.33 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_59e6.66be.63d1 X-Juno-Line-Breaks: 8-6,9-19,22-24,32-33,37-46,48-59,66-77,79-81,83-123,124-32767 From: al p Wick X-ContentStamp: 2:3:1436920659 X-MAIL-INFO:4b151534198574b5110414347114c161dd89c414d4fda49919d4c489d40dd47d303d40d115ed344534211955c1ad9d55b585a13d8d49c0c9f9f051f98d50b1509d90e99151d584e49190e009e0f0b484e1e050c421f45d45ed1945c47d157de5a9a0f9c91551b0fdf949d035b4b499311d24146da421a1d16d305d5dd5d145743819b540b5c180fd5189b579c1d9e0e475c16001a07460a19589d1253dbdf5d909d5646440f5e0900d9009e981b4e5957050d9712920c051f98dc9e5c965c161a075f07050312424fdd0a45179942d407de420b1c4f431941d30ed2054d14130111574747d10857d9d X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkN/L+MBTcx/OjxY8C5yPESIoxxpp21OfPg== X-UNTD-Peer-Info: 127.0.0.1|localhost|m12.lax.untd.com|alwick@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_59e6.66be.63d1 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Wow. Thanks for sharing that. Had never heard this warning. Fortunately I've never used the RTV for stress relief, but I can see how it would be so tempting. -al wick Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5 N9032U 200+ hours on engine/airframe from Portland, Oregon Prop construct, Subaru install, Risk assessment, Glass panel design info: http://www.maddyhome.com/canardpages/pages/alwick/index.html On Sun, 28 May 2006 11:00:29 -0400 "Tracy Crook" writes: First, DON"T EVER attempt to stress relieve a wire junction bundle with Silicone Rubber RTV! It cures with acetic acid which corrodes electrical connections!!!! Stress relieving wires is potentially a long subject so I'll have to reduce it to basic principle. In most cases, the concentrated stress with soldered connectors is a red herring argument (having no basis). Connectors generally have integral stress relief features built into the backshell which prevent stress from vibration & cable movement from reaching the point in the wire that has solder wicking into the strands. I usually go one step further and put a piece of heat shrink sleeving over the wire bundle where it leaves the connector. There are innumerable other methods of stress relieving wires. Adel clamps, wire lacing cord, and tie wraps are the most common. Just keep vibration from causing wire to flop around - That's the whole basis of stress relief in electrical work. ----- Original Message ----- From: Thomas y Reina Jakits To: Rotary motors in aircraft Sent: Saturday, May 27, 2006 3:36 PM Subject: [FlyRotary] Re: Another case of heat-soaked coils? Tracy, would you be so kind and elaborate on your way to do "stress relief" on solder/wire/cable joints? Thanx TJ ----- Original Message ----- From: Tracy Crook To: Rotary motors in aircraft Sent: Friday, May 26, 2006 9:41 PM Subject: [FlyRotary] Re: Another case of heat-soaked coils? Thought the coils were a long shot. I'm still not sure where the connection that failed was (connector contact or the unknown connection at the end of the pigtail left by cutting the connector off the Mazda harness) but I do like treating all connector contacts with a corrosion inhibitor. My favorite is Corrosion X. I like soldered connections for this reason too. I'll do my own stress relief to get it away from the potential stiff connection at the solder joint. To each his own though. Tracy (Granddaughter gone for the summer, Aahhhh.......... : ) ----- Original Message ----- From: Thomas y Reina Jakits To: Rotary motors in aircraft Sent: Friday, May 26, 2006 8:54 PM Subject: [FlyRotary] Re: Another case of heat-soaked coils? Get some SP-400! If you fancy it, mask the to be treated area - then aply a thin coat (shake the can really well and repeat often...). Get over any all connectors that are suspect to moisture. It will form a thin wax like coat. Re-apply at least one more time after a couple of hours or overnight. Areas that are really in the "wet" you should apply up to 5 coats. It takes a while to do a good job, but: It is transparent - you alway see the connection The coat gets a little harder with time, but always stays flexible It made my day on a Bell-47 for 3 month on the ocean!! TJ ----- Original Message ----- From: "John Slade" To: "Rotary motors in aircraft" Sent: Friday, May 26, 2006 11:31 AM Subject: [FlyRotary] Re: Another case of heat-soaked coils? > Well it wasn't the coils after all. > Florida humidity had gotten to one of my crank angle sensor connectors. > Problem solved. > Coils returned. > $206 back in my pocket. > Life is good > John > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -al wick Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5 N9032U 200+ hours on engine/airframe from Portland, Oregon Prop construct, Subaru install, Risk assessment, Glass panel design info: http://www.maddyhome.com/canardpages/pages/alwick/index.html ----__JNP_000_59e6.66be.63d1 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable
Wow. Thanks for sharing that. Had never heard this warning. = Fortunately=20 I've never used the RTV for stress relief, but I can see how it would be so= =20 tempting.
 

-al wick
Artificial intelligence in cockpit, Cozy IV powered by= =20 stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland,=20 Oregon
Prop construct, Subaru install, Risk assessment, Glass panel = design=20 info:
http:= //www.maddyhome.com/canardpages/pages/alwick/index.html
 
On Sun, 28 May 2006 11:00:29 -0400 "Tracy Crook" <lors01@msn.com> writes:
First,  DON"T EVER attempt to stress relieve a wire = junction=20 bundle with Silicone Rubber RTV!  It cures with acetic acid which=20 corrodes electrical connections!!!!
 
 
Stress relieving wires is potentially a long subject so I'll = have to=20 reduce it to basic principle.   In most cases, the concentrated= =20 stress with soldered connectors is a red herring argument (having no=20 basis).  Connectors generally have integral stress relief = features=20 built into the backshell which prevent stress from vibration & cable= =20 movement from reaching the point in the wire that has solder wicking into= the=20 strands.  I usually go one step further and put a piece of heat = shrink=20 sleeving over the wire bundle where it leaves the connector. &= nbsp;=20
 
There are innumerable other methods of stress relieving=20 wires.   Adel clamps, wire lacing cord, and tie wraps are = the=20 most common.  Just keep vibration from causing wire to flop around&= nbsp;-=20 That's the whole basis of stress relief in electrical work.
----- Original Message -----
From: Thomas y Reina Jakits
To: Rotary motors in aircraft=20
Sent: Saturday, May 27, 2006 3:= 36=20 PM
Subject: [FlyRotary] Re: Another= case=20 of heat-soaked coils?

Tracy,
 
would you be so kind and elaborate on = your way=20 to do "stress relief" on solder/wire/cable joints?
 
Thanx TJ
----- Original Message -----
From:=20 Tracy= =20 Crook
To: Rotary motors in aircraft= =20
Sent: Friday, May 26, 2006 9:= 41=20 PM
Subject: [FlyRotary] Re: = Another case=20 of heat-soaked coils?

Thought the coils were a long shot.
 
I'm still not sure where the connection that failed was (= connector=20 contact or the unknown connection at the end of the pigtail left by=20 cutting the connector off the Mazda harness) but I do like treating = all=20 connector contacts with a corrosion inhibitor.  My favorite is=20 Corrosion X.   I like soldered connections for this reason= =20 too.  I'll do my own stress relief to get it away from the = potential=20 stiff connection at the solder joint.  To each his own though.
 
Tracy  (Granddaughter gone for the=20 summer,     Aahhhh.......... : ) 
----- Original Message -----
From: Thomas y Reina Jakits
To: Rotary motors in = aircraft=20
Sent: Friday, May 26, 2006 8= :54=20 PM
Subject: [FlyRotary] Re: = Another=20 case of heat-soaked coils?

Get some SP-400!

If you fancy it, mask the to= be=20 treated area - then aply a thin coat (shake
the can really well = and=20 repeat often...).
Get over any all connectors that are suspect = to=20 moisture.
It will form a thin wax like coat. Re-apply at least = one=20 more time after a
couple of hours or overnight.
Areas that = are=20 really in the "wet" you should apply up to 5 coats.
It takes a = while=20 to do a good job, but:
It is transparent - you alway see the=20 connection
The coat gets a little harder with time, but always = stays=20 flexible

It made my day on a Bell-47 for 3 month on the=20 ocean!!

TJ

----- Original Message -----
From: "= John=20 Slade" <sladerj@bellsouth.net>=
To:=20 "Rotary motors in aircraft" <flyrotary@lancaironline= .net>
Sent:=20 Friday, May 26, 2006 11:31 AM
Subject: [FlyRotary] Re: Another = case=20 of heat-soaked coils?


> Well it wasn't the coils = after=20 all.
> Florida humidity had gotten to one of my crank angle = sensor=20 connectors.
> Problem solved.
> Coils returned.
>= $206=20 back in my pocket.
> Life is good
> John
>
>= ;=20 --
> Homepage:  http://www.flyrotary.com/>=20 Archive and UnSub:   http://mail= .lancaironline.net/lists/flyrotary/


--
Homepage: =20 http://www.flyrotary.com/Archive=20 and UnSub:   http://mail= .lancaironline.net/lists/flyrotary/
=
 

-al wick
Artificial intelligence in= =20 cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on=20 engine/airframe from Portland, Oregon
Prop construct, Subaru install, = Risk=20 assessment, Glass panel design=20 info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
----__JNP_000_59e6.66be.63d1--