Algodoo

Nice!

I love this concept! Great idea and you built it beatifully:)

All the accel values need to be renamed scene.my.accel otherwise it wont work for others(the Engine wont run) when it works its nice you have the same problem in the other 4 cyl truck you uploaded, hope it helps!

I have an 240hp Yamaha Apex

Around 165 hp @ ca 510 RPM:p I may make an dyno chart later if you want

if maxrpm > maxtorque the script Always uses maxtorque instead of finding a sweetspot. If you could fix this it would make for one Beautiful dyno!

Around 100-110 hp straight from 20 rad up to like 35-40. Great flat low-end powerband, nice!

This Engine sure has 30k+ hp(65 * 9,55 * 370000 / 7124=32239). This engine is insane! My dyno cant even handle it so i cant use it to calculate a Power/tourqe curve

Torque doesnt matter since you can just gear whatever Engine down enough so it can move anything, hp is what matters. It determines how fast anything can go and how much it can accelerate! Torque is nothing whitout rotation and torque with rotation is hp/kw/Power. people are mislead to belive torque means something, its really only a way to say an Engine has more or less Power(hp) at lower rpms ie more grunt in the low end to get moving. Torque only matters at a standstill when the Wheels are at 0 rpm, then you need some amount of torque to the Wheels to get moving. That torque is from what torque the whole drivetrains gearing produces not the Engines torque. I mean it would be really hard to get moving if you were to couple the Engine directly to the Wheels;)

A 150 hp 1 lite i4 coupled to a cvt would go as fast and accelerate as much as an 150 hp 6.2 litre diesel v8 also coupled to a cvt, assuming both Engines and cars weigh the same. It's all about gearing!

Wow sorry for rambling

I have a machine that i set what rpm i want it to brake the Engine down to.
Then it tries to hold that rpm by adjusting the torque on the brake and then it just does the math and smooths it out a Little and shows some nubers. its really crude and not very user frendly so i havent uploaded it. i almost Always need to adjust it for different testing engines.

To get a curve i use this machine and start at like 100 rpm and write down that number and then i go to 200 and so on until i have a list of torque and/or hp at different rpms. then i just put those numbers in some online graph maker thingy and voila. So its kinda time consuming.

A machine wich could do it all for me would be Amazing but i dont know how to do that

No i said that my dyno cant handle it because it is to powerful.

The only thing my dyno reguraly does is show me calculated hp an torque at a specific rpm, no curves/graphs in algodoo just numbers.

Sure i could still make a graph by manually figuring out the numbers but im to lazy for that.

Where is collideset/ign determined? my dyno uses scene.my.rpm so i needed to change it to rpm2 in your Engine and that broke the ignition

-edit-
Lol found it! im blind sorry

I love these Engines! I used my dyno to make you some charts over this engines perfomance

http://prntscr.com/6opiad Torque
http://prntscr.com/6opinw HP

As you can see from the HP chart this engine like all spawn engines dosent really benefit from revving all the way. After 500 rpm there is no Point to revving more. So my tip is to gear any gearboxes to shift up after 500 rpm

All your rotor engines have a really nice flat hp curve from low rpms, great eninges!

I am thinking about sharing my dyno so you can use it, but i dont know if its good enough yet for the public, its kinda buggy(scripting is hard).

You have peak power from 500 to 700 rpm(225 Hp). At 1000 rpm it "only" produces 155hp. Maybe you can get an even better time by trying to keep the engine around 600 rpm as much as possible, but dont fall below 400 since at 400 rpm its down to ~200hp and 300 rpm ~165hp.

I measured this in 1st gear with the car on the rollers. With the Engine disconnected from the gearbox it produces 240 hp @ 600 rpm so in 1st gear the drivetrain efficiency is ~94%;) 2nd and 3rd is ~91%.

anyways, really nice build as always!

Hey The Linkage, Do you possibly know how to calculate angular acceleration on a circle? would love some help!:)

rad/s * NM = Power in watts * 0,00136 = Power in HP is what i use to get around most conversions:p

I just have those scripts in a note and copy-paste it onto any engine i want to test for quick tests, very convenient!

Now we should build a fully universal auto-dyno with graphs

Man that engine has some serious power density!:D

Would be interesting to see some dyno curves on these to compare them

Love it!

a Power curve http://prntscr.com/7wty4u

10700 nm @ 200 rpm couldnt get it any lower than that without it breaking

My sled pushes about 280 hp and weighs 300 kg, thats a pretty good ratio;)