Is int the real reason of just end of lifetime of av-gas itself?Again: one of the reasons that pretty much ALL newly certified piston engines for some time are diesels, not gassers.
Is int the real reason of just end of lifetime of av-gas itself?Again: one of the reasons that pretty much ALL newly certified piston engines for some time are diesels, not gassers.
Why do you think Avgas is ending? GAMI and Swift are both producing UL avgas now to replace 100LL with STCs for hundreds of engine types.Is int the real reason of just end of lifetime of av-gas itself?
In EU we have closed our latest plant which produces that lead additive to fuel.Why do you think Avgas is ending?
In defense of CI vs SI: EVERY diesel now certified has a dismal power/weight ratio. Once someone comes up with Rotax power density (that is IMHO the benchmark) things will change.The Rotax 912iS and 915iS are SI engines where the EFI/ variable EI tech replaced carbs and fixed timing EI, resulting in a 15-20% reduction in fuel flow for the same TAS. These are the best selling aero engines in the world where CI engines have barely scratched the surface of market share in the past decade.
You have to compare of total weight for your mission - engine + fuel. I did this for Rotax 912 UL / ULS / 914 / DV6Once someone comes up with Rotax power density (that is IMHO the benchmark) things will change.
In defense of CI vs SI: EVERY diesel now certified has a dismal power/weight ratio. Once someone comes up with Rotax power density (that is IMHO the benchmark) things will change.
Open loop. Alpha-N alhorithm. Less precise than lambda one, but more robust.So, in keeping with their discussion of lean-of-peak operations and Lambda, how does the system determine the AFR without using an O2 sensor? Is it operating in a closed loop mode, but using EGT as the feedback sensor (just as a pilot might adjust mixture manually by reference to EGT)?
Open loop. Alpha-N alhorithm. Less precise than lambda one, but more robust.
Open loop. Alpha-N alhorithm. Less precise than lambda one, but more robust.
Exactly. Sad that it is not available in 1.4-1.6 liter size. Coolnes due to its lower compression ratio...like the idea of small and powerfull diesel engines, and the Mazda skyactiv diesel is really cool.
Maybe Rotax is getting these BSFC numbers using relatively good open loop logic (MAP, baro, RPM and temp) and they've just built their fuel tables to appropriately lean the injection when the engine isn't being asked to make much power (e.g low MAP relative to RPM). I dunno. But they aren't warning against leaded fuel (except as it affects valves), and they apparently aren't using an O2 sensor in normal ops.
Exactly. Sad that it is not available in 1.4-1.6 liter size. Coolnes due to its lower compression ratio...
On maf or map - agree. But is still a game of how much we need sensor to run it in high efficiency, and how much for limp home mode.
But we all want drip carburator as our fadec unit. With magnetos..Of all the things I think about when considering EFI system failure sensor issues are pretty far down the list.
But we all want drip carburator as our fadec unit. With magnetos..
In a plane that can accommodate gravity feed from the fuel tank, I'd think a floatless carburetor (e.g. Lake, POSA, RevFlow, AeroInjector, etc) could make an easy, light, reliable backup to an EFI system. It's little more than a calibrated fuel leak (tapered needle that admits more fuel as the slide throttle is opened) that varies mostly by throttle position, a little bit due to airflow rate past the needle. Since the EFI needs a throttle body anyway, these carbs can serve that purpose. No venturi (so little chance of icing), no fuel pump (so no electricity needed). If the EFI crumps out, just open the mixture knob to the carb and let that fuel start flowing.But we all want drip carburator as our fadec unit. With magnetos..
Exactly. Sad that it is not available in 1.4-1.6 liter size. Coolnes due to its lower compression ratio...
On maf or map - agree. But is still a game of how much we need sensor to run it in high efficiency, and how much for limp home mode.
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