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ETU (Engine Test Unit)

ETU (Engine Test Unit)

Type : Tool/Utility

What it does:
This tester will test the power generation of your engines and give you the maximum power generated and at what gear ratio. It does this by cycling through gears and using different clutch pressures to determine the optimal gear ratio for the maximum output power.
How to use it:
1. Connect the output of your engine to the input of the ETU (The green block on the side)
2. Add a 1x1 modular engine flywheel for best test results
3. Choose Appropriate ETU Controller Settings
a. Select the “Main ETU Controller” (Large microcontroller on the bottom of ETU)
b. Choose appropriate: Stall RPS, Max Gen Output, and Test Speed (HIGHLY RECOMMEND leaving speed test OFF)
c, Max Gen Output Reference
i. This setting will vary based on engine size, but a good rule of thumb is that the LARGER the engine (Either in number of pistons or crankshaft size i.e:3x3,5x5), the higher this number will have to be
d. If Unfamiliar with engines, leave default values
4.If you are planning to use the "efficiency" calculator built into the ETU Follow these steps
a. Make a custom fuel tank (large enough that it will last the whole test). If doubting size, just make it absurdly large.
b. Add a fluid sensor to tank
c. Connect the fluid level node (From the Fluid Sensor) to the Node show in the 3rd Image
d. MAKE SURE YOUR ENGINE USES A PROPER MODULAR ENGINE CONTROLLER(If using modular engines). This means that it should not stutter between full throttle and zero throttle while trying to maintain an constant RPS. This WILL mess up the data
5.Turn On switch called “ETU Main Power”
6.Wait for ETU to initialize
7.If using advance settings push the “Advanced Data and Settings” button (SEE ADVANCED DATA/SETTINGS section)
8.Press “Start Test”
9.Now start your engine
10.Wait for test to be completed (Time will vary allow up to 3-4 Minutes)
11.Results will be displayed
a. Max: Indicated the maximum power your engine produced
b. Gear: Indicates the gear ratio (input : output) that your engine performed the best
12.Test Can be repeated as many times as you want


Advanced Data and Settings (Look at “How To Use” before looking into advance settings)
1.Click “Advanced Data and Settings”
2.Three screens will turn on
a. The “RPS” and “Torque” screen display the current RPS and Torque that the engine is producing
b. The third screen allows you to change the input gearing to the tester by using the arrow (Up to Increase Input
Output Ratio and Down to Decrease Input Output Ratio)
i .If changing this setting set it before you start the test. DO NOT CHANGE IT WHILE TEST IS RUNNING. It will
mess up the data
ii. This is Mainly used when you have high torque engines so you can have an Output RPS > Input RPS


Settings in the Microcontroller:

Stall RPS: This is value that your engine stalls at. ETU will release clutch when RPS reaches this value to prevent your engine from stalling. (If you are testing steam pistons, set this value to 0)

Max Gen Output: This is max value of graph representing the generator output(Purely for cosmetic reasons)

Speed Test: This makes ETU testing faster but less accurate NOT RECOMMENDED!

Delay Between Gears: This is the delay between gear changes within ETU. Increase the value of you want to give your engine time to spin up between gear ratio tests. Ideal for steam turbines!


NOTICE:Typo in the 2nd image in the blue box: "Yest" should be "Test", "ginished" should be "finished". I used MS paint (BC i was lazy :P) and it won't let you edit text boxes once you de-select them.

If you have any Questions, bugs you find or typos/unclear sentences in this description, please post them in the comments below and I will get to them ASAP

Note: If you choose to repost my creation on the workshop / social media (Videos, Pictures, etc), give the original build credit to me and include a link to this build, even if you have edited it. DO NOT CLAIM THAT IT IS YOUR BUILD
- Thanks :D


PS:Loading screen credit goes to [BFL]Ragtagmanager becasue i was too lazy to make it :P