MON = Motor Octane Number. There is no direct relationship between RON and
MON and the difference between the two in the case of a single fuel is used
as a measure of temperature sensitivity.
Duncan mcF.
----- Original Message -----
From: "Jeremy Davey" <EuropaFlyer_3@msn.com>
Subject: RE: Europa-List: gas mixing
>
> Richard and Ken,
>
> I may be wrong, but is it possible Ken is confusing octane ratings. 87
> octane at the pumps in the US is 87 Octane MON (Mean Octane Number?),
> whereas the 95 octane stuff we're told to use in Europa is 95 Octane RON
> (Research Octane Number).
>
> The two are not the same measure, and MON gives a lower number than RON.
> 87MON is not far from 95RON, but my recommendation would be to do an MSN
> Search for these terms and come to an educated understanding of which auto
> gas you can use in the US.
>
> Either that, or ask a few folks flying Rotaxes what they use! :-)
>
> Cheers,
> Jeremy
>
> Jeremy Davey
> Europa Monowheel 537M G-EZZA
> Europa Club Vice-Chairman, Webmaster, PFA NC Representative
> PFA EC Member
> If you can keep your head when all about you are losing theirs, then it is
> possible you haven't grasped the severity of the situation.
> Tail done
> Standard XS wings with mods underway
> CM installed in fuse (with airbrakes fittings)
> 1380 build hours to date
> Intended fit:
> Rotax 914 turbo, Airmaster CS fully-feathering prop
> Lots of lights, buttons, switches, gizmos, and alarms
>
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of R Holder
> To: europa-list@matronics.com
> Subject: Re: Europa-List: gas mixing
>
>
> kenneth b. carpenter wrote:
> > carpenter" <kbcarpenter@comcast.net>
> >
> > Has anyone explored the issue of mixing 50/50 87
> > octane auto gas with 100 LL to get 93 octane gas for
> > 914T engines? I think 912S engines also need 93 octane
> > gas. Sounds like it would be better for the engine
> > than 100LL alone. Ken Carpenter N 9XS 914T
>
> Why not just use 91 or 93 octane Auto gas !
>
> If you are carting auto gas into your hanger to mix it
> with Avgas, why not just use auto gas ?
>
> 912 912S and 914 all run on Mogas (auto gas) and the oil
> needs to be changed every 25 hours if more than 30% Avgas
> is used. The oil changes are at 50 hour intervals if you
> use Mogas.
>
> Mogas is also cheaper ($5 a US gal here in England)
> compared with over $7 a US gal for AVGAS.
>
> Richard Holder
> Europa TriGear G-OWWW High Cross
>
>
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