Algodoo

150 nm @ 60 rad/s, 12hp. The weight is good too, only like 65kg. Great efficiency compared to some of your other engines! And there's still the awesome lack of vibration...

So, apply load to the engine until it slows down (but doesn't stall!) Then take the torque in NM and the speed (in rad/s, multiply it by 9.55 to get RPM) and multiply, then divide everything by 7124 and you get horsepower!

If that was hard to understand, here's an example.

I have an engine that can produce 1000 nm of torque at 50 rad/s. First we take 50 * 9.55 because it is in rad/s and we need to convert this to RPM, and we get 477 RPM. Now we just take the torque, 1000nm it this case, and plug everything into this equation -

477 * 1000 / 7124 = 66.956 horsepower!

I hope you got that

Just take your horsepower divided by weight, and you get efficiency. So 12 / 65 = 0.184 hp/kg. Pretty good! But I usually aim for ~0.6 hp/kg for my collide engines and 1 hp/kg for spawn engines.

I'm more concerned about excessive spamming of pointless scenes. If you don't post a million per second, that's fine with me.

The gearbox is truly horrible. It can never decide what gear to stay in, and sometimes shifts into gear 1 at top speed, which inevitably destroys the engine. Please fix that.

He derated it because of permanent playmode. I then told him... if you pause the fookin scene then you can turn it off!

I haven't worked on the tank in a while. It's probably going to come out like lethslasquirrel's radial engine steampunk tank. I've even added my own machine gun so far

Harry, DontTellHarry1701 doesn't like marble races.

All my comments/complaints/suggestions are in that "Important Announcement" scene I posted a little while ago.

Also, I think Xray hacked the rating system...

Zibit you.... well, it's better than what you do to protect your work lol! I can copy-paste it into my own scene and reupload if I want to. Please gather some knowledge to fill your microscopic brain before returning to Algobox! Also if you pause the scene then you can turn it off.

The Linkage, could you rate this 10 so it will cancel out Zibit's pointless rating?

I've got no problem with THIS type of marble-based scene! It's not a race, there's no voting/competition involved, it's just a nice demonstration of physics. I also get the feel that you spent more than about 15 minutes on this.

Not bad.

I got it to 45kph on flat ground. we don't usually use Metric here in the US but I think it's like 20-25mph? Good job anyway, and with that suspension

I do have some suggestions.

Spawn only 1 ball per piston! It will make the engine run more stable. And also try and boost the engine power because 25mph is really slow...

Also fix dat suspension... it's darn near undrivable.

Oh myyy... what is all that text and script and stuff!!? ( )

BTW, This engine is really awesome! It gave 5000 nm easy at 65 rad/s. so ~440hp according to my math

It's also 1500kg, but if you put it in a big truck or something it shouldn't really make much of a difference. It's got more vibration than most of your other engines, but it's not too bad. a straight6 engine with proper crank angles will always have 3 cylinders 120deg out of phase so you get very little vibration usually.

Interesting concept.

Also, have you seen Kilinich's truck contest? I think he should do it again (but people can build their own engines!)

I've just thought, could you try 100hz (or 120), because 150 is cheating for collide based engines like this.

I'm in!

Also, how will this be scored? I suggest making some sort of target, then we can choose how far we want to hit it from

aww, you beat me by 100km!

But I can get mine to go 1,000 km with some mods

I think you're the one who can't read. did ya understand what I just said? If you pause the sim then you can change it and stuff!

(They also deleted your comment because you're a total... need I say? )

y u repost

Interesting concept. I thought about something like this but never built it.

I've found it jams completely after about 3 rounds.

Yes, all wheels are driven. I wish I could get Kilinich to tell me if it would be legal or not. I'm going to facepalm so hard my face conducts nuclear fusion with my hand if it was legal...

I keep digging up tons of these entries... most of them got nowhere. This is probably one of my better ones.

Yeah I was thinking about doing that. I might add a more powerful engine, because I calculated Kilinich's engine only has ~50hp at max torque.

I really think he should host this contest again though. I can't believe I wasn't able to get a legit entry in...

I concur fully. I generally build scenes to suit a wide variety of Algobox users, whereas the Algicosathlon/MR scenes can only be enjoyed by people who do those things. I mean, I love building vehicles that go and stuff. That can be enjoyed by lots of people, whereas the same really don't apply to Algicosathlon/MR scenes...

No, I'm american.

Good job. Your HP calc is totally messed up though. I got a max of 3000 nm at 2200 rpm, so I got 926hp. Good for 180 kg engine (but at 500z! Dx)

However, it loses pretty much all torque below ~2000 rpm. It's like a turbocharged engine with very severe turbo lag. You get no power until 2000rpm, then the turbo kicks in and you go like hell.

There's, in fact, some math behind this. Because in a negative-damping engine, your spring gets compressed (piston goes up) then goes back down again with x amount of force more than it started with (where x is your damping, like -0.5 or something.) then when it goes up again, the piston has x amount of force to go back up, so the spring gets compressed more, and then we have x2 amount of force, then it goes back up again...

So the speed/torque increases exponentially, and you have most power at or near maximum RPM. So if you try to run engine at low speed, the piston isn't going as fast, and so increases only slowly until you reach a certain point, then it starts to go faster, and your torque curve ends up looking something like this.. (not my graph! )

Sorry for raving...

I do this constantly to my sister's stuff

I don't think you can rate/subscribe on the built-in algodoo browser. But to rate, there should be a blue bar on the left right before the comments, and just click one of the segments, farther to the left is 1, farther to the right is 10. there's also a little subscribe button next to it.

Not bad. My first car was much uglier

This car has one of the weirdest engines I've seen here. It's effectively four I2 engines stuck together, but they're arranged in groups of two, and the banks are not connected in any way, so every bank of 2 can spin individually if you remove the gearbox!

I did a power calc too. Every bank of 2 gives around 12-13hp, so 4 banks of 2 is around 50hp. Honestly 50hp is good for a 750kg car. Some cars I make have only 20hp but can go 80+ mph. This topped out at 147mph as I tested it. I honestly wouldn't drive it this fast IRL...

I tried a clutch similar to your example, but it worked poorly. I've built a better one by now and I'll install it in my next car.

Ultragamer, maybe if you MR/Algicosathloners acted less like 4yo kids all the time maybe everyone wouldn't be so mad about it!

Dude this is sweet! Can I do something with it?