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Pour votre info, voici un communiqué de DATS (filiale de Colruyt) qui fait une mise en garde concernant le carburant E10 distribué à large échelle en France.

http://www.dats24.be/dats/static/veiligheid_e10brandstof_f.shtml

A bon entendeur, salut!

Luciano

Bonjour à tous,

Je me souviens avoir longtemps discuté avec Pat à propos de l'essence qui pouvait contenir de l'éthanol.
Francis nous a donné un testeur qui permet d'en mesurer la concentration.
Le problème soulevé par la présence d'éthanol dans l'essence mogas se pose aujourd'hui. Voici un message d'un spécialiste. Il concerne surtout les moteurs anciens, mais doit faire réfléchir tous les pilotes, anciens et modernes.

I went to the LAA ageing engines seminar yesterday and found it very
interesting, hearing many people far wiser than myself giving their
opinions on the care and maintenance of old engines. In particular they
were all of the opinion that turning the engine over regularly when it
was not being flown was DAMAGING , it wipes the oil off and running
engines for short periods during the winter for instance was also bad,
unless the engine reached a temp high enough and stayed there long
enough to evaporate the water in the oil then all you were doing was to
create even more combustion acids in the oil without getting rid of
them. One suggestion was to change the oil before you laid it up for the
winter not to wait till its 50 or 100 hr check was due

Best thing to do was universally agreed to be preoiling before the
engine was run, Mind you how difficult it would be to get a mod agreed
to do that on our engines remains to be seen, there is apparently a part
sold by eg aircraft spruce but not of course approved here.

One subject that inevitably came up was mogas and thats the reason Im
writing this.

First there was pointed out the stupid anomaly that the CAA has issued
permission for engines to use mogas to EN228 but this must not contain
ethanol whilst at the same time the government has decreed that all
EN228 fuel must contain 5% ethanol !!!

It was stated that BP super unleaded did not contain any ethanol but no
one was sure if super unleaded met EN228, and Shell super did contain
ethanol

There were some very interesting findings published by various official
bodies one in particular having done most of its work in Germany and
found the following which do to a large extent put to rest many peoples
fears and expectations of what happens to mogas when it has ethanol added.
They tested for loss of ethanol during storage for 6 months in simulated
aircraft fuel tanks left outside and in various colours made of ally

Result NO significant loss of ethanol due to evaporation.

No significant uptake of water into the fuel.

On the down side they found that some materials mainly elastomers were
badly attacked by the ethanol others also affected to a lesser extent
were thermo setting resins eg as used in fibreglass. most other
materials were not badly affected but some manufacturers formulations of
materials were much worse affected than others of the allegedly same
material. Cork however was affected to some degree so all those with
cork float fuel gauges check them!!

One last interesting point was from a paper produced by Qinetic who
whilst agreeing that ethanol would reduce the temperature in
carburettors by up to 5 degrees, said that the antifreeze properties of
ethanol could in fact reduce carb icing. Not what I expected at all.

Hope this is of interest
rod


Claude B

Luciano a écrit:Pour votre info, voici un communiqué de DATS (filiale de Colruyt) qui fait une mise en garde concernant le carburant E10 distribué à large échelle en France.

http://www.dats24.be/dats/static/veiligheid_e10brandstof_f.shtml

A bon entendeur, salut!

Luciano

Quel crédit peut-on accorder à ce communiqué de la concurence (DATS) alors que l'E10 est appelé à remplacer le SP95 en Europe?
Ne sommes-nous pas en pleine guerre de l'information motivée par la défense d'intérêts juteux?
Rotax.....E10 or not E10? Le débat reste ouvert.
Georges le sceptique.

Claude B a écrit:Bonjour à tous,

Je me souviens avoir longtemps discuté avec Pat à propos de l'essence qui pouvait contenir de l'éthanol.
Francis nous a donné un testeur qui permet d'en mesurer la concentration.
Le problème soulevé par la présence d'éthanol dans l'essence mogas se pose aujourd'hui. Voici un message d'un spécialiste. Il concerne surtout les moteurs anciens, mais doit faire réfléchir tous les pilotes, anciens et modernes.

I went to the LAA ageing engines seminar yesterday and found it very
interesting, hearing many people far wiser than myself giving their
opinions on the care and maintenance of old engines. In particular they
were all of the opinion that turning the engine over regularly when it
was not being flown was DAMAGING , it wipes the oil off and running
engines for short periods during the winter for instance was also bad,
unless the engine reached a temp high enough and stayed there long
enough to evaporate the water in the oil then all you were doing was to
create even more combustion acids in the oil without getting rid of
them. One suggestion was to change the oil before you laid it up for the
winter not to wait till its 50 or 100 hr check was due

Best thing to do was universally agreed to be preoiling before the
engine was run, Mind you how difficult it would be to get a mod agreed
to do that on our engines remains to be seen, there is apparently a part
sold by eg aircraft spruce but not of course approved here.

One subject that inevitably came up was mogas and thats the reason Im
writing this.

First there was pointed out the stupid anomaly that the CAA has issued
permission for engines to use mogas to EN228 but this must not contain
ethanol whilst at the same time the government has decreed that all
EN228 fuel must contain 5% ethanol !!!

It was stated that BP super unleaded did not contain any ethanol but no
one was sure if super unleaded met EN228, and Shell super did contain
ethanol

There were some very interesting findings published by various official
bodies one in particular having done most of its work in Germany and
found the following which do to a large extent put to rest many peoples
fears and expectations of what happens to mogas when it has ethanol added.
They tested for loss of ethanol during storage for 6 months in simulated
aircraft fuel tanks left outside and in various colours made of ally

Result NO significant loss of ethanol due to evaporation.

No significant uptake of water into the fuel.

On the down side they found that some materials mainly elastomers were
badly attacked by the ethanol others also affected to a lesser extent
were thermo setting resins eg as used in fibreglass. most other
materials were not badly affected but some manufacturers formulations of
materials were much worse affected than others of the allegedly same
material. Cork however was affected to some degree so all those with
cork float fuel gauges check them!!

One last interesting point was from a paper produced by Qinetic who
whilst agreeing that ethanol would reduce the temperature in
carburettors by up to 5 degrees, said that the antifreeze properties of
ethanol could in fact reduce carb icing. Not what I expected at all.

Hope this is of interest
rod


Claude B

Le moins que l'on puisse dire c'est que les avis sont contradictoires.

Chacun pourra interprêter comme il veut!

Georges.
Qui défend quoi???