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ulflyer(at)verizon.net
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 Posted: Wed Feb 03, 2010 10:49 am Post subject: Reason for use of Silk Thread |
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What is the purpose of placing a piece of silk thread along with
sealant when joining the two cast halves of an aircraft engine. Is
this done on all engines or just Continental and Lycoming, what about
4-stroke Rotax.
jerb
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blackmore(at)platinum.ca
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| Posted: Wed Feb 03, 2010 6:26 pm Post subject: Reason for use of Silk Thread |
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During the war Rolls Royce used to machine to close enough tolerances that they could use a piece of silk alone as the seal between parts
[i]----
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Wed Feb 03, 2010 7:22 pm Post subject: Reason for use of Silk Thread |
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The silk thread IS the seal even today. The so-called sealant is there just to hold the silk thread in place. Otherwise oil could work its way past the ordinary sealant.
On Wed, Feb 3, 2010 at 7:25 PM, Chris Blackmore <blackmore(at)platinum.ca (blackmore(at)platinum.ca)> wrote:
[quote] During the war Rolls Royce used to machine to close enough tolerances that they could use a piece of silk alone as the seal between parts
[i]----
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Wed Feb 03, 2010 8:42 pm Post subject: Reason for use of Silk Thread |
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Ken Tunnell at LyCon has an STC to "O" ring the case.
--
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AuCountry Aviation
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Fri Feb 05, 2010 8:17 am Post subject: Reason for use of Silk Thread |
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Some useless trivia.
I read a book on Rolls Royce once and it said that there were three 1909 silver ghosts that were refitted with armoured car bodies and sent into action in WW I. One of the cars had problems with the extra weight and had to have the front spindles replaced. After the war the original bodies were returned to the cars... Then in WW II the same cars were refitted with armoured bodies and saw service in England. At the writing of the book all three cars were still on the road. Not bad considering they were made over a hundred years ago and there were less than ten made.
Noel
From: owner-engines-list-server(at)matronics.com [mailto:owner-engines-list-server(at)matronics.com] On Behalf Of Chris Blackmore
Sent: February 3, 2010 10:55 PM
To: engines-list(at)matronics.com
Subject: Re: Reason for use of Silk Thread
During the war Rolls Royce used to machine to close enough tolerances that they could use a piece of silk alone as the seal between parts
-------Original Message-------
From: jerb (ulflyer(at)verizon.net)
Date: 03/02/2010 11:58:05 AM
To: engines-list(at)matronics.com (engines-list(at)matronics.com); Kolb List (kolb-list(at)matronics.com)
Subject: Reason for use of Silk Thread
--> Engines-List message posted by: jerb <ulflyer(at)verizon.net (ulflyer(at)verizon.net)>
What is the purpose of placing a piece of silk thread along with
sealant when joining the two cast halves of an aircraft engine. Is
this done on all engines or just Continental and Lycoming, what about
4-stroke Rotax.
jerb
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