David, I was comparing to MPG to normal antifreze. And they are very comparable. The amount of water you mix with it is an independant factor.
And like we discussed before, running just 20% antifreze, either MPG or MEG, will be helpful in raising the boiling point withhout much loss of heat carrying capasity.
Dave Leonard
> David,
>
> "the performance is not really significantly better" doesn't seem to be even close to the facts - the performance is much WORSE, as Ed A just pointed out. The point is, you need a significantly bigger cooling system - &/or cooling system heat rejection capacity - if you use MPG. This was discussed extensively a year or two ago. It is not a good idea. Check it out further before you commit to it.
>
> I'm going to use "environment friendly" water, plus John Deere Coolant Conditioner (lower cost equivalent to motorcycle trade's Water Wetter) for max heat transfer in 6 warm months and 50/50 normal antifreeze when freezing level drops.
>
> I looked in my e-mail "hard copy" files and found one from Ed March 30 1999 summarizing same conclusions. Chuck harbert wrote March 29, 1999 that "NPG gets very viscous at below freezing temps and therefore should not be used where air temps are below 10-15deg F. What happens is that the NPG won't move thru the rad and the engine overheats."
>
> David Carter
David,
"the performance is not really significantly better" doesn't seem to be
even close to the facts - the performance is much WORSE, as Ed A just pointed
out. The point is, you need a significantly bigger cooling system -
&/or cooling system heat rejection capacity -
if you use MPG. This was discussed extensively a year or two ago. It
is not a good idea. Check it out further before you commit to
it.
I'm going to use "environment friendly" water, plus
John Deere Coolant Conditioner (lower cost equivalent to motorcycle trade's
Water Wetter) for max heat transfer in 6 warm months and 50/50 normal antifreeze
when freezing level drops.
I looked in my e-mail "hard copy" files and found
one from Ed March 30 1999 summarizing same conclusions. Chuck harbert
wrote March 29, 1999 that "NPG gets very viscous at below freezing temps and
therefore should not be used where air temps are below 10-15deg F. What
happens is that the NPG won't move thru the rad and the engine
overheats."
David Carter
----- Original Message -----
Sent: Saturday, May 08, 2004 1:30 PM
Subject: [FlyRotary] Re: MPG Coolant
That's funny. I did a similar search and seemed to
discover that the performance is not really significantly better but I will
probably use it from now on for its environmental properties.
The
same search did convince me of the benifical properties of water wetter, so I
ordered some of that :-)
Thanks,
Dave
> Subject: [FlyRotary]
Re: MPG Coolant
>
> Dave,
> I did a search on the web, and
the MPG coolant is Mono Propylene Glycol. It
> is the non-toxic
anti-freeze, and apparently it does have a much higher
> boiling
point. Both Sierra and Amsol make one. After reading about it,
I'm
> definitely going to get some.
>
> Steve Brooks
>
Cozy MKIV 13BT
>
> -----Original Message-----
> From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of daveleonard@cox.net
> Sent:
Saturday, May 08, 2004 12:44 PM
> To: Rotary motors in aircraft
>
Subject: [FlyRotary] MPG Coolant
>
>
> One of the guys at
the airport says that "all" the subaru guys are using
> something called
MPG instead of Ethylene Glycol/water because it boils at
> 290 without
need to be pressurized.
>
> Does anyone know anything about that
stuff?
>
> Dave Leonard
>
>
> >>
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>
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