REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue

[Douglas Holub]

The transition temperature for EZ-Poxy is about 70 C for room temperature cure, 90 C after a 2 hour 150 F post cure.  I think West Systems is about 10 degrees fahrenheit less.
  ----- Original Message ----- 
  From: aminetech at bluefrog.com 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Friday, November 25, 2011 2:17 PM
  Subject: Re: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue


  Alex,

  I have a temperature strip on the crush plate of my IVO prop.  It's range is 80-90C.  Over the years it has slowly reached the maximum.  I don't know if 90C will affect epoxy or not.

  John



  --- velocity_pilot at verizon.net wrote:

  From: "Alex Balic" <velocity_pilot at verizon.net>
  To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
  Subject: Re: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue
  Date: Wed, 23 Nov 2011 15:21:44 -0600


  But what about on the spinner- I doubt that the exhaust was that close to the back plate- did the epoxy vaporize from the heat of the crankshaft? I wouldn’t think that it would get that hot in that location…



  From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of aminetech at bluefrog.com
  Sent: Wednesday, November 23, 2011 9:14 AM
  To: Velocity; Velocity Aircraft Owners and Builders list
  Subject: Re: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue

   


  The heat from the exhaust pipe caused it.  The exhaust was about 1/4" from the cowl. 


   


  John

  --- VelocityXL at fastmail.fm wrote:

  From: "Velocity" <VelocityXL at fastmail.fm>
  To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
  Subject: Re: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue
  Date: Wed, 23 Nov 2011 07:11:58 -0600

   


  Did this happen just from the heat of the engine ? 


  Was the exhaust real close? 


   


  Ron 


  ----- Original Message ----- 


  From: aminetech at bluefrog.com 


  To: Brett Ferrell ; Velocity Aircraft Owners andBuilders list 


  Sent: Tuesday, November 22, 2011 6:41 PM 


  Subject: Re: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guideissue 


   


  It's amazing how heat can vaporize epoxy.  One of my exhaust pipes was too close to the cowl.  The epoxy vaporized, leaving a shredded fine mesh of fiberglass. 


   


  John

  --- reflector at velocityxl.com wrote:

  From: "Brett Ferrell" <reflector at velocityxl.com>
  To: reflector <reflector at tvbf.org>
  Subject: REFLECTOR: Epoxy and Carbon Spinners / Lampshade flow guide issue
  Date: Tue, 22 Nov 2011 18:45:17 -0500 


  For folks with carbon spinners (well, really epoxy bulkheads or lampshade style flowguides) should take note of James Redmond's find on the Stagger EZ.  I'd been concerned about this since Marc Zeitlin's incident and replaced my spinner bulkhead with a metal one from Spruce, but here is another example of one that overheated and cooked the epoxy, and detensioned the prop bolts.  Be careful out there. 


   


  Brett 


   


   


   


   


   


   


   


   


   

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