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I wish he was still making posts.

Yes, seriously everyone should watch this:

https://www.youtube.com/@AngeTheGreat

Other engine simulators work by approximating the engine.

Ange's engine simulator works by approximating physics of air fluid dynamics through a combustion chamber and exhaust, sound propagation, etc and then putting an engine into that simulation.

It's incredible how productive and precise he is.

He published it as open-source for like 5 seconds before taking the repository down in order to charge for it on Steam! I'm a little weirded out by that pattern of open-sourcing it and then just changing his mind.

This was the Revell 'Visible V8', first released in 1958. https://macsmotorcitygarage.com/revisiting-the-visible-v8/

The Visible V-8. That made it well into the 70s.

I see no declaration that this is a machine generated site, but the aesthetic is a dead giveaway. The language on the “how it works” page is unmistakably LLM output. As a total novice in engines this site had the potential to educate me, but did the author vet the data at all? If the author doesn’t bother telling me they checked any output on this, what assurance do I have anything is accurate on the site at all? If I knew an actual engineer put their focus on this tool I’d feel much better about trying to learn something from it. Short of that it’s just a pretty (but predictable) interface.

"Supercar" has 670hp 500lb-ft @ 5297rpm which seems reasonable. After configuring the tool with my car's specs, it was fairly close on the dyno; though, I'm very far from an expert. Imho, pretty cool, nonetheless.

I fed the technical data of my motorcycle into the model and it told me right away that this build would destroy a real engine because the piston speed would be too great.

The real thing has been running for 56,000 miles, so it can't be that bad. *g

In principle you can instantaneously set the throttle opening to some position and set the RPM to whatever you want. In time the RPM will rise or fall until the engine is at equilibrium, but throttle position and RPM aren't like mechanically interlocked. Otherwise how could the engine speed up when you go down a hill?

When you press the gas pedal in your car down (which used to just be a cable to the throttle body), does your car instantaneously increase in speed to match the pedal position?

All you're doing is letting more air in - the RPM is a function of the power the engine generates; more fuel and air than is currently needed for the current load at the current speed = increasing RPMs.

If you put the clutch in, a little blip of the gas is all that's needed to get the RPM quite high very quickly. The moment there's load on there, the same blip will not do very much at all.

Imagine your vehicle is pulling a heavy load up a hill vs. going flat out on a track. Your throttle position may be the same but the RPMs are likely to be quite different, even when you account for the transmission.

> Surely the RPM depends on the throttle?

Partly. Another factor in the equation is load.

3000? Here I am wishing there was some Wankel Rotary representation and you're shifting at 3000? What are you driving, a Peterbilt?

3000 RPM is 50Hz right?

3765 kW / 5049 hp is the max I could do.

V Twin Bank, Turbocharged with Intercooler. And Fuel is Hydrogen!

I imagine such an engine would instantly blow itself apart in real life. Basically the simulated version of those tractor pull cars where the engine survives for about 500 rotations before it has to be rebuilt.

How do you tell how much power it is making?

All the gauges on the top right except the RPMs move

if its useful and entertaining i dont think many ppl care especially evident that you cannot be certain with your accusations

Sounds would be pretty cool.

Airplanes do (did?) v16s and v24s as well, if memory serves.

There's also a build out there where someone did a "v12" vw beetle with a v6 for each axle.

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