modular engines weak? or am i dumb?

[Thorkin14]

cant figure out how to get power out of my v12 engine. it runs great and is set up really well but im only getting like 2 knots lol. rps is at like 14. compared to a regular engine im getting nothing.

[Siegfried67]

You should post your setup. I made a 24 cyl radial engine (or 18, don't remember) takes up roughly the same space as a medium diesel, but outputs way more power (didn't look at fuel efficiency yet, but seems really good).

[GrumpyOldMan]

引用自 Siegfried67：

You should post your setup. I made a 24 cyl radial engine (or 18, don't remember) takes up roughly the same space as a medium diesel, but outputs way more power (didn't look at fuel efficiency yet, but seems really good).

Sounds promising, can't wait to get into those, especially for those small 1-2cyl setups.

[Siegfried67]

引用自 Thorkin14：

cant figure out how to get power out of my v12 engine. it runs great and is set up really well but im only getting like 2 knots lol. rps is at like 14. compared to a regular engine im getting nothing.

Just realized it's probably not an engine issue. If your engine runs at 14 RPS under load, your engine setup doesn't matter. If 14rps only gets you 2 knots, it's a propulsion issue. Try adding a gearbox or more more propellers. If the engine was too weak, it would stall, not get to 14 rps.

[Thorkin14]

引用自 Siegfried67：

引用自 Thorkin14：

cant figure out how to get power out of my v12 engine. it runs great and is set up really well but im only getting like 2 knots lol. rps is at like 14. compared to a regular engine im getting nothing.

Just realized it's probably not an engine issue. If your engine runs at 14 RPS under load, your engine setup doesn't matter. If 14rps only gets you 2 knots, it's a propulsion issue. Try adding a gearbox or more more propellers. If the engine was too weak, it would stall, not get to 14 rps.

sorry for the late response. i have a gearbox on there ive used a few different ratios and even tried the gearbox the other way around for more torque but im still getting nothing out of it or it just stalls. mostly stalls when i tried a higher ratio or when i put a larger propeller on it

[Thorkin14]

ill try to get a good description of it when i logon in a few hours. havnt looked at it since last night.

[Teamkiller]

You may have problems with feeding your engine with fuel and air or taking out exhaust. It is very easy to mess things up with modular engine.

[TheNormalPlatypus]

they are week

[Thorkin14]

should i be using pumps to make the fuel n air go faster?

[Siegfried67]

引用自 tinalouiseharris：

they are week

no they're not

[Jerro]

I made a small car with a 4 cylinder engine. The first gear has a 3:1 ratio in the direction that increases torque and the acceleration is terrible. I had to add an electric motor that engages a little to keep it from stalling. Outside of that the thing has a top speed of 152 km/h. I don't remember what the highest gear ratio was. Has a controller that limits the RPS to 20.

The engines seem to have really bad torque but once a vehicle gets going they have no problem. Weird.

[Jaka]

I done a short test and at least with me.
1 intake 1 cylinder - give very little power takes a very long time too ramp up
1 intake 2+cylinder - it seems too give a tiny performance increase
2 intakes 1 cylinder - no benefit
2 intakes 2 cylinder - massive jump in performance
2 intakes 2+ cylinders - it seems too give a tiny performance increase

I did try too link the cylinders several diff. ways, seem too have very little effect if any
This was a very limited test

[Thorkin14]

so one thing that helped was the electric motor on the side helping it get going, alternator keeps it charged so its stable. still only getting a max of like 6 knots and like 18rps

[Snjo]

Someone posted a bug report explaining that cylinders don't feed adjacent cylinders from a its intake properly. The result is that you need a separate fuel/air intake per 1-2 cylinders.
I converted my slow 3*5 cylinder engine to a beast by removing the middle of five cylinders in each row.

So >CCCCC is way less efficient than >CC>CC

[Siegfried67]

i used 1 air intake and 1 exhaust on a 8 cyl line without issue. Was when the modular engine was added with the experimental branch, didn't go back to it since lastest update. But i can confirm they did feed the adjacent cylinders when released.

[Siegfried67]

Just to be sure, i made a new test setup, to compare power:

1 Medium diesel engine, powering a large generator at 1:1 gear ratio for load
1 4x5 Radial engine, powering a large generator at 1:1 gear ratio for load
1 4x5 radial engine, powering a large generator at a 3:1 ratio (higher generator rps) for load

Every engine runs at 1 throttle, and both radial engines power the additionnal 2 generators at 1 clutch pressure, so even more load, but i won't take the power produced into account.

I chose 4x5 radial engines, because i got them the same size as the medium diesel engine, even a bit smaller, even with 2 alternator, and don't forget there's already a built-in clutch.

The results:

Medium diesel gets to 12 rps, 156 torque, generating 191 electrical output with the generator.

1:1 radial engine gets to 35 rps, 276 torque, generating 1414 (no it's not a typo) electrical output with the generator.

3:1 radial engine gets to 14 rps, 173 torque, generating 223 electrical output with the generator.

About fuel efficiency, i run all 3 on a 697 L large prebuilt fuel tank.

First to run out is naturally the 1:1 radial, running on higher RPS.
At that moment, the medium engine was down to 495 L, having used up 202 L of fuel.

But the 3:1 radial was down to ... 686 L, only using 11 L of fuel.

The 3:1 radial engine is more powerfull than the medium diesel, at the same size, and 20 times more fuel efficient.

The 1:1 radial engine, having used fuel 3.45 times faster than the medium engine, might seem fuel inefficient, but remember it was generating 7.4 times the electrical output the medium diesel did, so still 2.14 times more power generated per L.

Oh, and each 5 cylinder line only has 1 air / exhaust manifold.

One last note: those engines are the same size as medium diesel, but only half the weight...