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'caulking' pass-thrus

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nuckolls.bob(at)aeroelect
Guest

Posted: Fri Dec 18, 2020 9:54 am Post subject: 'caulking' pass-thrus

More that once, I've seen a grey-beard at Raytheon-

 Beech give someone the 'evil eye' for suggesting

 any sort of uckem-yucky for use on production

 lines. I won't say that tubes of squeeze-out-stuff

 were never used on the finished product but it was

 rare.



 Pass-thrus on the 30 series airplanes were configured

 as shown in attached. A piece of firesleeve was first

 'doped' on the ends to prevent fraying (yup, that

 was a brush-on uckem-yucky). It was clamped hard

 onto the feedthru tube. If the wires passing thru

 did not 'fill' the voids, pieces of firesleeve

 'tape' were wrapped around and thru the strands and

 secured with a string tie before a second stainless

 clamp would bring the matrix of firesleeve into

 close contact with wires.



 This closure method was no doubt 'proofed' by

 Puff-the-Magic-Dragon who resided in Jack Thurman's

 house of horrors. No ooze, goop, or wiping rags yet

 EASY to disassemble for maintenance or addition

 of new wires.



 

   Bob . . .



   Un impeachable logic: George Carlin asked, "If black boxes

   survive crashes, why don't they make the whole airplane

   out of that stuff?"

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jluckey(at)pacbell.net
Guest

Posted: Fri Dec 18, 2020 12:16 pm Post subject: 'caulking' pass-thrus

I don't understand the reference...

"This closure method was no doubt 'proofed' byPuff-the-Magic-Dragon who resided in Jack Thurman'shouse of horrors."

But this "Jack" guy sounds like a lot of fun 





Also, what's a 30 Series airplane?  The picture looks like a Production aircraft but I can't identify it.  (I'm gonna guess... Cessna 210 ???)





-Jeff





                  

                                                                    On Friday, December 18, 2020, 10:11:39 AM PST, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:                 

                 



                 



                   More that once, I've seen a grey-beard at Raytheon-

 Beech give someone the 'evil eye' for suggesting

 any sort of uckem-yucky for use on production

 lines. I won't say that tubes of squeeze-out-stuff

 were never used on the finished product but it was

 rare.



 Pass-thrus on the 30 series airplanes were configured

 as shown in attached. A piece of firesleeve was first

 'doped' on the ends to prevent fraying (yup, that

 was a brush-on uckem-yucky). It was clamped hard

 onto the feedthru tube. If the wires passing thru

 did not 'fill' the voids, pieces of firesleeve

 'tape' were wrapped around and thru the strands and

 secured with a string tie before a second stainless

 clamp would bring the matrix of firesleeve into

 close contact with wires.



 This closure method was no doubt 'proofed' by

 Puff-the-Magic-Dragon who resided in Jack Thurman's

 house of horrors. No ooze, goop, or wiping rags yet

 EASY to disassemble for maintenance or addition

 of new wires.



 

    Bob . . .



   Un impeachable logic: George Carlin asked, "If black boxes

   survive crashes, why don't they make the whole airplane

   out of that stuff?"

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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Ceengland

Joined: 11 Oct 2020
Posts: 391
Location: MS

Posted: Fri Dec 18, 2020 1:51 pm Post subject: 'caulking' pass-thrus

I think Bob is saying that the       firesleeve/hose clamp method (which I also referenced) was tested       in a production aircraft facility (Raytheon-Beech) using a       blowtorch type device, to FAA qualification required limits, and I       suspect that Jack Thurman ran the testing division.

       

       On 12/18/2020 2:11 PM, Jeff Luckey wrote:

     

      	  Quote: 	
		                         I don't understand the           reference...

         

         

                    "This closure method was no doubt               'proofed' by               Puff-the-Magic-Dragon who resided in Jack Thurman's               house of horrors."

           

         

         But this "Jack" guy           sounds like a lot of fun 

         

         

         

         

         Also, what's a 30           Series airplane?  The picture looks like a Production aircraft           but I can't identify it.  (I'm gonna guess... Cessna 210 ???)

         

         

         

         

         -Jeff

         

         

         

         

       

                            On Friday, December 18, 2020, 10:11:39 AM PST, Robert L.             Nuckolls, III <nuckolls.bob(at)aeroelectric.com> (nuckolls.bob(at)aeroelectric.com) wrote: 

           

           

           

           

                                                        More that once, I've seen a grey-beard at Raytheon-

                 Beech give someone the 'evil eye' for suggesting

                 any sort of uckem-yucky for use on production

                 lines. I won't say that tubes of squeeze-out-stuff

                 were never used on the finished product but it was

                 rare.

                 

                 Pass-thrus on the 30 series airplanes were configured

                 as shown in attached. A piece of firesleeve was first

                 'doped' on the ends to prevent fraying (yup, that

                 was a brush-on uckem-yucky). It was clamped hard

                 onto the feedthru tube. If the wires passing thru

                 did not 'fill' the voids, pieces of firesleeve

                 'tape' were wrapped around and thru the strands and

                 secured with a string tie before a second stainless

                 clamp would bring the matrix of firesleeve into

                 close contact with wires.

                 

                 This closure method was no doubt 'proofed' by

                 Puff-the-Magic-Dragon who resided in Jack Thurman's

                 house of horrors. No ooze, goop, or wiping rags yet

                 EASY to disassemble for maintenance or addition

                 of new wires.

                 

                 

   Bob . . .

                     

                       Un impeachable logic: George Carlin asked, "If                     black                     boxes

                       survive crashes, why don't they make the whole                     airplane

                       out of that stuff?"

                                  

             

           

         

       

     	
     

       	 		 			 				 			 		 		 			

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