Hello Mr Paul Lamar. I want some information about oil property (and
also the oil already use ) for aircraft rotary engine. in google I
do not find something and in a website I see your newsletter. please
help me if you can Thank you Mahdi Barjasteh
For the oil sump we recommend Mobil 1 or Idemitsu rotary engine oil.
For the apex seals we recommend mixing one ounce of two cycle oil
with each gallon of gasoline.
4 litres is about one gallon US so 1 ounce liquid US is about 30 cc
in the French system :)
30/4 is 7.5 so 7.5 cc per litre will work fine.
Paul Lamar
I'd say that an additional possibility exists of putting 1 cc of
LiquiMoly (MoS2) for every liter of fuel, that's what the producers
of this Molybdenum Di-sulphide say, and the attached chart from the
book by E McGovern points to a reduced wear when leaded gasoline was
employed, Lead acting as a solid lubricant, MoS2 is also a solid
lubricant, and thus, same good results can be expected with MoS2
additives, LiquiMoly or Molykote, as those detected with the
fortunately no longer existent leaded gasolines. Best regards.
Salut † Jose Gros-AymerichMadrid, Spain
I am not rich enough by a factor of 10 million to try a new apex
seal lubrication. I would have to be near unconscious to try
something that dumb :)
2.5 million Mazda engines have been sold using oil to lube the apex
seals.
IT IS NOT BROKE!!!!!!!! However YOU are free to try it. Let us know
how it works.
Paul Lamar
Hi Paul: I've just reviewed the SAE paper 922375 I downloaded in your
www.rotaryeng.net site, about lubrication in the Mazda 24 hr Le Mans
competition, and it points that mixing an organic Molybdenum compound
in oil/fuel will improve fuel economy by 1.5%, and will also protect
the metal in bearings, so the conceptof MoS2 added to oil was tested
and proved good, the question remains on whether the LiquiMoly
additive, to be put 1cc per liter of gasoline oil-mix is the right
one, I ignore if it's an: 'organic Molybdenum additive', but perhaps
somebody knows about it. Thanks for your attention, have a good
season, best regards,
salut Jose Gros-Aymerich
Madrid, Spain
The apex seal oil cools the apex seal as well. This is absolutely
essential. Might not hurt to add it to the 2 cycle cooling oil.
Paul Lamar
IIRC Idemitsu's Rotary Premix (same stuff used in Le Mans Winning 787B)
has a
small % of MolyB in it... Just saying.
Dan G.
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