Many thanks for the reply Remi, very informative.
Cheers,
Tim
Tim Ward
12 Waiwetu Street
Fendalton,
Christchurch, 8052
New Zealand.
ward.t@xtra.co.nz
Ph 64 3 3515166
Mob 0210640221
On 13/08/2011, at 4:43 AM, "Remi Guerner" <air.guerner@orange.fr> wrote:
>
> Hi Tim,
> It is important to understand that AVGAS and MOGAS use two different scales
> for
their octane number.
> RON = Research Octane Number is used in Europe and some other countries for
MOGAS.
> MON= Motor Octane Number is used worldwide for AVGAS.
> Here in France, unleaded Mogas 95 is 95 RON and 85 MON.
> Unleaded Mogas 98 is 98 RON and 87 MON.
>> From what you wrote, I assume this is the same in your country. Therefore,
>> your
Mogas 91 is probably 91 RON and about 81 MON.
> On the other hand, AVGAS 100LL is 100 MON, and the new AVGAS UL91 we available
in France is 91 MON.
> ROTAX says the 912 needs 90 RON minimum, and the 912S and 914 need 95 RON
> minimum.
So those flying behind a 80 HP 912 can almost use anything, but for the
912S and 914 do not use any Mogas below 95.
> The new UL91 AVGAS is a very good news as it offers additional margin against
detonation, no additives which can damage hoses, gaskets, etc and a better
quality
control. Unfortunately the price is about 20% higher than the best Mogas.
>
> Regards
> Remi Guerner
> F-PGKL
>
>
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>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=349262#349262
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