How much effect on speed should mixture have?

[Monostripezebra]

Yer-2 had Two 60 Litre Diesel V12s. Would love that in all honesty. 

 

I can tell you´re a submariner by heart...

[6./ZG26_Klaus_Mann]

Diesels are just the Superior Engines, it's that simple. The Modern Age managed to ruin them Unfortunately but the OM 615,616 and 617 are just legendary. 

 

But this with the original 1.3 Pushrod Diesel would be my absolute Dream. 

 

[ZachariasX]

Diesels are just the Superior Engines

Why?

 

If you have Engine Troubles with your Petrol Car and it not running right; Check your Sparkplugs. Thankfully I have a Diesel and don't have to worry about all that Nonsense. Petrol Engines are so Overrated.

Because with those, I have no sparkplugs to check? But there is a glowplug (that could fail).

 

Again, why are "diesel just superior"? Wouldn't that depend on the purpose you're using the engine what is the right fit and techinology?

Edited April 25, 2017 by ZachariasX

[6./ZG26_Klaus_Mann]

The Glow Plugs aren't needed to Run, just to Start. And the Engine will run just fine even if only one works, just a bit Clattery for the First Minute. 

Modern EFI Diesels are running Low Voltage Electrics and are still simpler than modern EFI Petrol ones. 

 

For Daily Drivers and Workmachines Diesels are clearly the better Choice. 

• Longer Life
• Lower Fuel Consumption
• Cheaper Fuel
• More Low End Torque, so less wear in normal, every day use since you would drive at far lower RPM most of the time
• simpler and more durable Fuel Delivery
• simple Engine Management
• No High Voltage Electricity
• And while they may Produce a bit more Soot and Nasty Stuff, they produce far less CO2 owing to the much higher Efficiency. 
• And you don't have all the Mixture Trouble, no Throttle Body, no too Lean or Rich. Just More or Less Diesel through the Injectors. 

I still don't understand the VW Scandal. On the "Cheater Setting" the 2.0s managed 60+mpg and the 1.6s in the 75mpg Range, CO2 was phenomenally good and Power was very good as well. All it did was produce a bit more NOx, and because American Standards are blatantly Pro-Petrol they had to install a bit of trick Software where at the Cost of all of the above they had a "Test Stand Setting" where it met the NOx Standards as well, but getting well below 50mpg. 

 

And in all honesty, if you want to Save the Climate, the more Cancer the Cars Produce, the Less People there are to hurt it. 

Edited April 26, 2017 by 6./ZG26_Klaus_Mann

[6./ZG26_Klaus_Mann]

[Riderocket]

On German aircraft with direct fuel injection, there's absolutely zero fuel in the air at this point. Manifold pressure is mainly a function of intake air pressure (i.e. altitude) and compressor rpm (i.e. engine rpm) and is regulated by the throttle.

 

But on German aircraft you can't even adjust the mixture, so the OP must be referring to any aircraft with manual Mixture.

[Riderocket]

A question remains (although it doesn't concern mixture);

Is it correct, that in the Rata, the inlet radiator and oil radiator both affect the oil temperature gauge?

Nope, the inlet cowls control cylinder head temperature, because the cool air enters where the cylinders are. The oil radiator cools The Oil, I find leave the oil fully open, it tends to hold 100 degrees in summer, and put the Inlet cowls at around 25% to hold around 150 degrees in summer.

 

Edit: opening the Inlet cowls will also cool oil to an extent , but will also rapid cool your cylinders

 

Not sure about winter, last time I flew Rata in winter was a long while ago.

Edited April 26, 2017 by Riderocket

[Scojo]

On speed? Not a lot. Climb? Probably a noticeable amount.

 

On engine life? A lot.

 

But we don't have to worry about engine life in a Sim very much, now do we?

[6./ZG26_Klaus_Mann]

Running Lean can kill your Engine quite Rapidly. I'm talking Minutes to Cylinder Seizure and Burnt Heads. Running Full Throttle Lean is the Perfect Recipe for a Dead Engine.

[ZachariasX]

For Daily Drivers and Workmachines Diesels are clearly the better Choice.

 

Ok, I'm getting what you are coming from.

 

 

but the OM 615,616 and 617 are just legendary.

 

And why you chose these as the desireable reference.

 

Myself, I'm glad we're rid of these ugly sounding weak old stinkers. i do however share many of your "plus sides" of the Diesel engine. But I like those blessings almost excluvely in the materialization of the BMW M550. (Not so sure however if that can be called a simple engine.) For classics, I much prefer the 427cui V8. A truly simple engine.

 

Although the Diesel enjoys the advantages of in principle a simpler structure, much of its long service life is due to them being used at low power, this in turn facilitated in cars due to higher torque or in other applications the insesitivity to weight. Diesel are not easy engines to draw power from, if weigt is an issue. This in contrast to gasoline engines. It is moronic to have a light car run by a Diesel engine, if "lap times" are an important metric.

 

The efficiency Diesel engines draw from is the higher burn temperature. But this is about 10%, not more. A tad better, not a game changer. You get another 10% of "economy", as Diesel is heavyer than gasoline, and thus carries more carbon to burn per litre.

 

Cars are a special issue anyway. Most of the time, your engine, for instance the mentioned M550, produces about 20 hp to drive at 80 km/h. 20 out of the advertised 380 hp! This means, most of the efficience you see in todays super fuel efficient engines you get by optimizing the idle run. This means you're also leaningthe mixture to the point where you even conveniently shut down injection when the car senses that it is rolling, the wheels effectively turning the crankshaft.

 

This also stands in direct contrast to your comment that there is

 

you don't have all the Mixture Trouble, no Throttle Body, no too Lean or Rich.

 

There indeed is. The injector is what does your mixture, not a carb. And besides that, modern gasoline engines are injector engines as well. Even the DB601 was one of those. Mixing fuel and air is the center piece to ANY combustion engine. It doesn't matter whether you mix in the piston (injector) or in the manifold (carburetted engine). But, mixing, you do.

 

Rich and lean mixture is thus an inherent feature to any gasoline or Diesel engine. Same as with gasoline engines, as soon as you depress your gas pedal, you over proportionally enrich mixture. Even in Diesel engines, you need to worry about burn temperature at high power. If you don't, even the most legandary Diesel stinker won't last long.

 

The higher burn temperature has another downside to it: It "burns air", producing NOX. In the good old heydays, where we didn't care about that, the brownish color of the air over cities was even more prevalent. Now the darkening of the smog is mostly fine dust (from combustion as well). Gasoline engines produce less of that, as they run cooler. Claiming NOX to be an American unfairness and harmless otherwise, I find not very substanciated. Then again, we're tarding evils here.

 

But at least for short range, most use for Diesel engiens will probably cease, as electric engines do everything much better. It just depends on the batteries now. I'm positive that even with aircraft, this will become frequent. Starting with helper engines for gliders, then aerobatic planes, etc.

 

But "I like the smell of 100 octane in the morning."

[6./ZG26_Klaus_Mann]

No Diesel Engine uses a Throttle to Control Mixture, because it isn't necessary for a Self Igniting Engine.

Running a Diesel at 1:15 Mixture has a Name: "Rolling Coal". Normally Diesels will run a Range of 1:200 to 1:25 Stochiometric Ratio, above that is when they Start Getting Dirty. That's why Turbodiesels are so Popular, literlly being called "Umweltdiesel" at some Point. It wasn'T about Power but Emissions. 

 

The cleanliness of a Diesel heavily depends on Fuel Pressure. The Old Diesels ran very low Pressures which is the main Reason for the Emissions and Smog. 

The Modern ones running 2500-5000bar Injector Pressures are far cleaner, pretty much no Comparison. 

[JtD]

And besides that, modern gasoline engines are injector engines as well.

Which makes them produce soot, to a degree where the modern filtered Diesel engines produce less soot then modern unfiltered Otto engines.

[ZachariasX]

No Diesel Engine uses a Throttle to Control Mixture,

Of course. I just meant to say that mixture changes as well in Diesel engines. And you gave a good example of that.

 

 

Which makes them produce soot,

The "unclean burn" when you don't use a carburator system causes also a loss of efficiency. It is these couple of % plus in power that made RollsRoyce favor a carburetor for the Merlin over an injector system, as used by Daimler Benz.

 

But as Klaus says

The cleanliness of a Diesel heavily depends on Fuel Pressure.

I'd like to add this is the same case with gasoline engines.

 

Both engines are not so bad anymore in that department, it just depends how much you want to pay for them. Most pay very little. As for "low emissions", both engines produce mainly water and carbodioxide as result. One or the other only fares better if specific requirements require one or the other system. So I'd stay rather agnostic to means. For me, it's the purpose that matters.

[-TBC-AeroAce]

Pop pjloiuouoio

Hi uopuuj hi ujuilj hi up ul u ukk lojl pu ph looking Ij op ouol ljpjppulojjlp pio p LP ko pionol uplipj ljjjopuuuiupubuljju jjujj ok ou poppinglloppnn puhulkpuupkluououooiiioinppjllnpuppu p jluooiiinuuj ou njbu MN up kuulonger l

Hi uopuuj hi ujuilj hi up ul u ukk lojl pu ph looking Ij op ouol ljpjppulojjlp pio p LP ko pionol uplipj ljjjopuuuiupubuljju jjujj ok ou poppinglloppnn puhulkpuupkluououooiiioinppjllnpuppu p jluooiiinuuj ou njbu MN up kuulonger l

[DD_Arthur]

Pop pjloiuouoio

Hi uopuuj hi ujuilj hi up ul u ukk lojl pu ph looking Ij op ouol ljpjppulojjlp pio p LP ko pionol uplipj ljjjopuuuiupubuljju jjujj ok ou poppinglloppnn puhulkpuupkluououooiiioinppjllnpuppu p jluooiiinuuj ou njbu MN up kuulonger l

Hi uopuuj hi ujuilj hi up ul u ukk lojl pu ph looking Ij op ouol ljpjppulojjlp pio p LP ko pionol uplipj ljjjopuuuiupubuljju jjujj ok ou poppinglloppnn puhulkpuupkluououooiiioinppjllnpuppu p jluooiiinuuj ou njbu MN up kuulonger l

 

Good point, well made!

[Solmyr]

Now I need someone to explain to me why the yaks run so perfectly fine on 0% mixture and 0%prob pitch at around 300kph...

 

In my hands it won't run "perfectly fine" : I tested that once yet and I easily blew up the engine when trying to lean at around 20% input only if I remember well. (at ~500m)