Gilles,
Thanks for all the info, as usual you are a great resource. I'm still
over a year from completing the Europa, but I won't forget this one.
Ralph
XS motorglider
Reno,NV
Gilles Thesee wrote:
> <Gilles.Thesee@ac-grenoble.fr>
>
>
> Ralph,
>
>> "...I just heard today that the new waterless fluid is flammable. I
>> saw it burn today/ Stemme has issued an urgent SB to remove the stuff
>> - I heard 2 fatalities of coolant leak catching fire. The 50 - 50
>> solution will not burn. Oh well! Have you heard anything about this?
>> I also discovered that the 100% solution of antifreeze burns too..."
>
> Yes glycols are flammable. Remember those WWII air combat stories ?
>
> The NPG+ consists of a blend of different glycols (propylene glycol
> seems to be the main component, as in the regular NPG coolant).
> Propylene glycol (1,2 propanediol) has a 107C flash point.
> Please see SDS here http://www.sargentwelch.com/pdf/msds/sch94661.pdf
>
> In my opinion, the main hazard is with mists and fumes. A pinpoint
> leak may well produce some heavier-than-air flammable mist under the
> cowling.
> Do you have additional info on this Stemme SB ?
>
> Nowadays, very few people in Civil Aviation Authorities, if any, have
> a clear understanding of what is involved in internal combustion
> engine cooling...
> From a pure technical point of view, there is little to be gained by
> using those water-free coolants.
>
> Regards,
> Gilles Thesee
> Grenoble, France
> http://contrails.free.fr
>
>
|