Re: RE: Melted fairing

["Jonathan Schulster" <Schulster@xxxxxxxxxxx>]

As Eric pointed out in his previous post, the problem starts when the insulation contacts the exhaust pipe/header joint(s).  It then conducts heat very nicely and the plastic reaches melting point rapidly (with a nasty smell).  If you use a 'thicker' insulation it is more likely to contact the exhaust at some point.  The main purpose of the insulation is to prevent heat radiated from the pipe being absorbed - it does not need to act against conduction unless it touches the pipe!  The thinner type of insulation is purely radiative (from what I can tell).  The air flowing between fairing and exhaust takes care of most of the cooling - so it is also important to maintain the air gap between insulation and the pipe.
- - Jonathan

>>> "Retherford, Martin" <MRetherford@xxxxxxxxxxx> 31/08/99 01:01:49 >>>
He is using the thin and the foam - thick on top of each other.

Martin
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