---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 07/28/09: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:26 AM - Re: Re: 912ULS Coolant (Jay Hyde) 2. 12:38 PM - A new replacement for 100LL ? (ricklach) ________________________________ Message 1 _____________________________________ Time: 09:26:52 AM PST US From: "Jay Hyde" Subject: RE: RotaxEngines-List: 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 _____________________________________ Time: 12:38:53 PM PST US Subject: RotaxEngines-List: A new replacement for 100LL ? From: "ricklach" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.