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  #1  
Old 01-26-2020, 01:24 PM
EastCoastFlyer EastCoastFlyer is offline
 
Join Date: Nov 2012
Location: MA
Posts: 24
Default S-1207 won't stay glued to spinner

My pitot tube bushing (S-1207) will not stay glued to the spinner. I've roughened it with course sandpaper and glued it several times to the spinner (with blue Loctite) and it pops out during flight (it stays on the pitot tube). Anybody else have this problem? Anybody had any luck with another glue?
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  #2  
Old 01-26-2020, 01:48 PM
HarryL HarryL is offline
 
Join Date: Jun 2015
Location: Woking UK
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I lost one recently so the new one is held in with epoxy. Definitely won’t be coming out now!
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  #3  
Old 01-26-2020, 05:22 PM
Mich48041 Mich48041 is offline
 
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Location: Riley TWP MI
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Blue Loctite ONLY works with metal parts and in the absence of air (anaerobic).
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RV-12 Flying
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  #4  
Old 01-26-2020, 06:24 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by Mich48041 View Post
Blue Loctite ONLY works with metal parts and in the absence of air (anaerobic).
There is an absence of air on a good portion of the busing where it is inserted into the spinner so the anaerobic action does occur, and it does work with other than metal parts.
The problem is that the bushing is made from Rulon, a PTFE plastic that is difficult to get adheasion too.

The Loctite product was originally used because it was something that RV-12 builders were already going to have to obtain for other things.

Because of instances of the bond failing, the recommended adhesive was changed a few years ago.
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  #5  
Old 01-26-2020, 06:35 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
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Eight years and almost 1000 hours later epoxy still holds mine firmly in place.
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  #6  
Old 01-27-2020, 07:43 AM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 620
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My bushing, originally set in blue Loctite, came lose after only a few hours on the engine. At the time, I installed a new bushing using Proseal as the adhesive ... so far it has held up quite well.
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  #7  
Old 01-27-2020, 07:47 AM
EastCoastFlyer EastCoastFlyer is offline
 
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Location: MA
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My plans must be old then. What is the new adhesive that is recommended?
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  #8  
Old 01-27-2020, 07:59 AM
AZLeeJay AZLeeJay is offline
 
Join Date: Dec 2013
Location: Phoenix
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I also used proseal when my came loose at several hundred hours
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Old 01-27-2020, 08:11 AM
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jrtens jrtens is offline
 
Join Date: Apr 2018
Location: Sandy, Utah
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Quote:
Originally Posted by EastCoastFlyer View Post
My plans must be old then. What is the new adhesive that is recommended?
The KAI says fuel tank sealant. MM recommends MC-236-B1/2 or MC-236-B2.
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  #10  
Old 01-27-2020, 11:21 AM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
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Quoted below from the Loctite THREADLOCKER BLUE 242 TECHNICAL DATA SHEET
The product cures anaerobically, when there is an absence of air between close fitting metal surfaces.
Not for use on plastic parts
If two inactive metals are used, use of a primer is required
Set Time: 10 minutes on active metals (steel). Longer for less active metals
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