Gearbox Test

Gearbox guide. Gear ratios review and testing. Research of efficiency of the gearbox. In the process of complementing ...

Intro

Stormworks v1.1.6

Gearbox Ratio

Gearbox direction	Motor >> Drive	1:-1	1:1	5:6	2:3	5:9	1:2	2:5	1:3
Gearbox direction	Motor << Drive	1:-1	1:1	6:5	3:2	9:5	2:1	5:2	3:1

Motor >> Drive

Ratio	Coefficient
1:1	1
5:6	0.83
2:3	0.67
5:9	0.56
1:2	0.5
2:5	0.4
1:3	0.33

Motor << Drive

Ratio	Coefficient
1:1	1
6:5	1.2
3:2	1.5
9:5	1.8
2:1	2
5:2	2.5
3:1	3

Converting power transmission (Theory)

Gearbox no load

Torque (Motor >> Drive)	1.95	1.792	1.633	1.528	1.475	1.38	1.317
Gearbox	1:1	6:5	3:2	9:5	2:1	5:2	3:1
Torque (Motor << Drive)	1.95	2.14	2.425	2.71	2.9	3.375	3.85

The torque sensor adds 1 to the measurements, without adding real resistance. Let's check the results of the force conversion.

Let's calculate the ratio 1:1, subtract 1 unit added by the torque sensor.

 1.95-1=0.95 We got a gearbox efficiency of 95%

Let's calculate the ratio 3:1, subtract 1 unit added by the torque sensor. And divide by the gearbox ratio.

 3.85-1=2.85
 2.85/3=0.95 We got a gearbox efficiency of 95%

Let's calculate the ratio 1:3, subtract 1 unit added by the torque sensor. And multiply by the gearbox ratio.

 1.317-1=0.317
 0.317*3=0.951 We got a gearbox efficiency of 95%

The no-load gearbox converts power as expected.

---

Gearbox load 1 torque

Torque (Motor >> Drive)	2.9	1.63
Gearbox	1:1	3:1
Torque (Motor << Drive)	2.9	6.7

Let's calculate the ratio 1:1, subtract 1 unit added by the torque sensor. Subtract torque 1 of the small generator

 2.9-1=1.9
 1.9-1=0.9 We got a gearbox efficiency of 90%

Let's calculate the ratio 3:1, subtract 1 unit added by the torque sensor. Divide by gearbox ratio. Subtract torque 1 of the small generator

 6.7-1=5.7
 5.7/3=1.9
 1.9-1=0.9 We got a gearbox efficiency of 90%

Let's calculate the ratio 1:3, subtract 1 unit added by the torque sensor. Multiply by the gearbox ratio. Subtract torque 1 of the small generator

 1.633-1=0.633
 0.633*3=1.899
 1.9-1=0.9 We got a gearbox efficiency of 90%

All right

Converting power transmission (Small Electric Motor)

Small Electric Motor > Torque Meter > Gearbox > Torque Meter > Medium Generator

Rps	Torque	Ratio	Rps	Torque	Generate
8.53	33	Direct	8.53	33	17.53
8.36	32.45	1:1	8.35	33.85	16.80
6.97	38.34	6:5	8.36	33.37	16.84
5.58	47.17	3:2	8.37	32.9	16.88
4.66	56	9:5	8.37	32.58	16.9
4.19	61.9	2:1	8.37	32.42	16.91
3.36	76.62	5:2	8.38	32.14	16.93
2.8	91.35	3:1	8.38	31.95	16.95

The final speed of the generator is approximately the same at different gearbox ratios. 3:1 efficiency even slightly higher than 1:1. Let's count.

RPS of the motor at a ratio of 1:1 8.36 divided by a gearbox ratio of 3:1

 8.36/3=2.78 

A little less than it turned out during testing

Torque at a ratio of 1:1 32.45, subtract 1 unit added by the torque sensor. And multiplied by a gearbox ratio of 3:1

 32.45-1=31.45
 31.45*3=94.35 

Resistance is greater than it turned out during testing

And although the efficiency of the gearbox turned out to be more than 100%, the difference is subtle, but it is a bug and needs to be corrected.

Converting power transmission (Small Engine)

Small Engine > Torque Meter > Gearbox > Torque Meter > Medium Generator

Rps	Torque	Ratio	Rps	Torque	Generate
17.66	41	Direct	17.66	41	75.18
17.33	40.45	1:1	17.29	41.45	72.01
12.29	46.34	6:5	14.71	39.7	52.19
8.16	55.17	3:2	12.22	37.97	35.97
5.9	64	9:5	10.61	36.8	27.16
4.93	69.9	2:1	9.84	36.22	23.34
3.4	84.62	5:2	8.5	35.18	17.4
2.55	99.35	3:1	7.65	34.48	14.09

The final speed of the generator is very different for different gear ratios of the gearbox. Efficiency 3: 1 is several times lower than 1: 1. Let's count.

RPS of the motor at a ratio of 1:1 17.33 divided by a gearbox ratio of 3:1

 17.33/3=5.78 

The final speed should be more than double.

Torque at a ratio of 1:1 40.45, subtract 1 unit added by the torque sensor. And multiplied by a gearbox ratio of 3:1

 40.45-1=39.45
 39.45*3=118.35 

The load should be more than the testing showed.

The results turned out to be strange, something is definitely missing here. Perhaps the torque that I still can't catch somehow affects.

In search of torque diesel engines

Small Engine > Torque Meter > Medium Generator x3
Small Engine > Torque Meter > Gearbox > Torque Meter > Medium Generator
Small Engine x3 > Torque Meter > Gearbox > Torque Meter > Medium Generator
Medium Engine > Torque Meter > Gearbox > Torque Meter > Medium Generator

Rps	Torque	Ratio	Rps	Torque	Generate
6.49	101	Direct	6.49	101	30.43
2.55	99.35	3:1	7.65	34.48	14.09
6.37	119.35	3:1	19.07	40.82	87.66
6.37	119.35	3:1	19.07	40.82	87.66

no conclusions
to be continued...

My other guides

https://steamcommunity.com/sharedfiles/filedetails/?id=2405685030
https://steamcommunity.com/sharedfiles/filedetails/?id=2404061436
https://steamcommunity.com/sharedfiles/filedetails/?id=2403852438

[user]

when you're comparing "Motor >> Drive" to "Motor << Drive" is the bigger number better or worse, which one generates more speed and which one generates more power, im looking for less fuel consumption

[Barry B. Good]

Bless you kind one.

[csmemerclaus]

Could you do specs on modular engines too?

[stuff]

what ratio spins the fastest?

[DRxNO]

May be an intended feature instead of a bug, so you have to go down into the engine and repair whats broken...???

[DM.β Industries Corp.]

nice

[Anti-Personic Bullet]

I've been using a line of 20 parallel 5x5 gearboxes and the clutch is increased by a throttle lever at 1% sensitivity and still they break (sometimes). it would be nice if gearboxes had a logic "broken" output

[ATOM]

I don't know how to check it yet. I can advise you to release the clutch smoothly. If this is not enough, use a larger gearbox.

[Anti-Personic Bullet]

Could you look into the gearbox stress mechanic? I can't figure out why they break sometimes and not others. I suspect its bugged since I can make a line of identical gearboxes with identical load and one of them will break and none of the others or vice versa