Today's Message Index:
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1. 09:26 AM - Re: Re: 912ULS Coolant (Jay Hyde)
2. 12:38 PM - A new replacement for 100LL ? (ricklach)
Message 1
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| Subject: | Re: 912ULS Coolant |
Perhaps you should ask my mates Mike and James what they used :-)
They are about to arrive at Oshkosh (this afternoon) after having flown from
Johannesburg in South Africa (left Saturday 18th June) and flew non-stop, 20
hours, to Sao Tome, just south of Nigeria; then to Guinea; then a giant hop,
22 hours flying non-stop across the Atlantic to Belem, Brazil; then to
Virgin Islands; then Florida and today en-route to Oshkosh.
They are flying a 2 seater, low winged, Light Sport, 912 engined aircraft
that they designed and built themselves, called the Sling.
When we filled the aircraft up we used whatever we could get at the nearest
service station as long as it was silicate free- we were working practically
around the clock against a deadline at a remote airfield, so no time to get
the exact right stuff...
If you read their logs (see
http://www.airplanefactory.co.za/world/default.asp) you'll see that some
very dodgy mogas was also used- even across the Atlantic
Jay
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jay Hyde
HH Enterprises
Aircraft Manufacture, Engineering and Flying
jay@horriblehyde.com
Mobile phone: 083 300 8675
International: +27 83 300 8675
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: 27 July 2009 02:34 AM
Subject: RotaxEngines-List: Re: 912ULS Coolant
Hi Tommy,
Most any will work. Only so many ways to make antifreeze. Any 50/50 will
work. Needs to be silicate free. Some antifreeze's don't mix with DexCool.
Make sure that if you use a DexCool antifreeze that you only put something
back in that is Dex Cool compatible. If you need to just top off a low
reserve tank then distilled water works best. If you are changing your
coolant then flush out any old DexCool before putting something else back
in.
WHY, because
In particular, alkali metal silicates have been found excellent for
protecting aluminum
against corrosion. In glycol-based radiator protectants, however, they tend
to form
gels or even to precipitate, so creating a need for special silicate
stabilizers.
Examples of constituents of such combinations of active substances include
salts of
organic acids which, especially in the form of their alkali metal salts, are
efficient
corrosion inhibitors, whereas the free acids are less effective or may even
be corrosive.
The incidence of free acids in radiator protectant formulations as a
possible result,
for example, of oxidation processes or the ingress of nitrous gases into the
cooling
system is therefore highly undesirable. It is for this reason that radiator
protectant
formulations contain small amounts of agents known as reserve alkalinity
donors
which have a buffer action in the relevant pH range and so prevent the
formation
of free acids. Examples of compounds employed as reserve alkalinity donors
are
amines and phosphates and, in particular, the less expensive borax. Such
corrosion
inhibitor compositions are described, for example, in EP-B-0 229 440 and
EP-A-0 308 037.
Because of the above-described disadvantages associated with the use of
silicates as
corrosion inhibitors for aluminum, in recent developments a trend has been
noted to
omit them and instead use other active substances. Under these conditions,
however,
the reserve alkalinity donor, borax, is highly corrosive, and so can no
longer be used.
The use of phosphates in modern-day radiator protectant formulations is
likewise
undesirable. This applies to an even greater extent to amines, on the basis
of their
characterization as potential nitrosamine formers."
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=254833#254833
Message 2
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| Subject: | A new replacement for 100LL ? |
I just read an article about a new contender to replace 100LL avgas. It's called
UL94 and Teledyne Continental Motors is saying they will have all there engine
ready to run on it by 2010. At first glance it looks like a good fuel for the
912. Dose anyone know anything about this new uncertified as yet fuel.
Rick
--------
Rick
N35 26.700, W118 16.743
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=255021#255021
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