No turbo engines.
Same for engines with a CR above about 8.5:1.
And, worldwide, the above burn ~2/3 of 100LL.
Peter wrote:
No turbo engines.
That’s only one page out of six. But yes, no turbo models.
Absolutely, no turbos and no hi compression in the lists.
Although I know of a few people with such engines taking off and landing on the one tank filled with Avgas, and switching to other tank filled with Mogas for the cruise portion of the flight…
Peter wrote:
And, worldwide, the above burn ~2/3 of 100LL.
Those figures are surprising to say the least… maybe worldwide if at all, source?
My field might not be representative, but of those 180 aircraft based here, around 10 are turboed, and about 12 are running on a > 8.5 CR.
Even if the above figures are true, that still leaves a big chunk of engines (albeit not aircraft) being able to use Mogas or Autogas.
If G100UL, or any similar fuel hits the market, I doubt people now using Mogas will cough up for an Avgas replacement fuel which will for sure be more expensive…
If G100UL, or any similar fuel hits the market, I doubt people now using Mogas will cough up for an Avgas replacement fuel which will for sure be more expensive
Again, the question: do you think Mogas (E0 non-alcohol auto fuel sold at airports) is or will become widely available across Europe and (more to the point) remain that way indefinitely when car use is switching under pressure to E10, and likely to E15 in the future?
Indefinitely means nothing, the more so in the aviation world 
Facts are that we have Mogas available at many fields, and those are becoming more frequent as demand rises. This rise is certainly also due to the wider use of Rotax equipped machines.
So, to answer your question, yes.
And again, assuming an Avgas replacement fuel becomes available, do you think all these Rotax and Lyco/Conti users now using Mogas will merrily jump on that new and more expensive gas bandwagon? Why would they?
Not to forget a good proportion of aircraft flying with Autofuel, right now, the more so in the UL world.
Indefinitely means nothing, the more so in the aviation world
It means something in my aviation world, and my investments in aviation wouldn’t exist unless I thought they would be stable for decades. Yes, Europe is by contrast chaotic but think the goal of all concerned should be to reduce chaos in aviation fuel supply, not increase it. It is a basic commodity.
And again, assuming an Avgas replacement fuel becomes available, do you think all these Rotax and Lyco/Conti users now using Mogas will merrily jump on that new and more expensive gas bandwagon? Why would they?
Because if they want to run fuel without alcohol, that will likely be their only choice IMO. Auto fuel without alcohol will continue to decrease in availability until it is gone.
The appearance of an Avgas replacement would not necessarily mean a killing of Mogas… I believe there would be quite some resistance, unless the new fuel would be sold at the price Mogas is selling. Dream on
Should Mogas disappear, would lead to a surge of Autofuel (Super 98 for instance) users.
What will probably happen is that Mogas will stay, and remain cheaper by some, whilst the Avgas replacement will replace… the Avgas.
The appearance of an Avgas replacement would not necessarily mean a killing of Mogas… I believe there would be quite some resistance.
If auto fuel is all E10 or more by then, which it will be, ‘Mogas’ would become a specialty fuel. I wouldn’t myself bet on anybody wanting to sell two specialty fuels. Mogas as it is now sold at airports in a limited number of European countries is just relabeled auto fuel.
Should Mogas disappear, would lead to a surge of Autofuel (Super 98 for instance) users.
That’s going to have alcohol too. I went through this decades ago, the so-called environmentalists will have their way with auto fuel, and if you don’t want alcohol at the airport I think it will be Avgas or nothing.
Or perhaps as in my area, you can buy a boat for the sole purpose of filling it up at the dock from the last remaining source of non-alcohol auto fuel. The boat fuel market was large enough to preserve a specialty fuel for boats, and once you’re away from the dock who knows what might happen… But that’s a complicated way to buy fuel for a plane 
I’m therefore happy that 100LL is widely available at almost every airport I’ll use for a reasonable taxed price, €1.34 per liter today, and it’s a reliable source of supply for everybody who flies. If/when they take the lead out and produce a drop in replacement that’ll be OK for every plane too. No pointless chaos.
Well, we could finesse on the subject endlessly, could we not?
We (luckily) don’t have a crystal ball, nor are we in a position to really influence the system. GA is more and more becoming a survival game, and anything is possible, the more so here on the old continent.
So, for now I’ll keep enjoying my flying whilst burning the precious dino juice the most efficiently I can (Carson speed), noting that nothing lasts for ever
A tactical approach and a strategic view can coexist. Using car fuel now because what you can get now is OK for your individual use does not preclude recognizing now that a secure and widely available aviation fuel that’s useable by all would be a good thing. Especially after non-alcohol auto fuel is long gone, and unless you want to be limited to flying a fuel injected Rotax that (as the British might say) can’t pull the skin off a rice pudding.
