dous the cab fan do anything

[henhovla]

it spins but are there a resjon to turn it on/off

[Buzzzz]

Yeah, it cools you off. Don't you feel it?

[Buzzzz]

;)

[StOnEdSmUrFz]

but don't turn it on when it rains you will get a cold.

[Sunscreen]

Turning it to max heat and opening the window helps cool the engine.. at least that's how my car seems to work in traffic jams its that old

[Pops]

It is just like racing stripes on cars. It adds 5 hp to the train when its on :P

[HUDoff••|972]

"Cool down the engine
Increase fuel consumption by 30%
Reduce power output by 20%
Make a wooshing sound"

https://www.nexusmods.com/derailvalley/mods/113

[maxine]

Originally posted by jomardi972:

"Cool down the engine
Increase fuel consumption by 30%
Reduce power output by 20%
Make a wooshing sound"

:smily: https://www.nexusmods.com/derailvalley/mods/113

Increase fuel consumption by 30%? It's a fan, not an AC compressor.

[Sunscreen]

Not my quote and needs fact checking as Im not familiar with locomotive design but this is a comment from the mod page. Dont shoot the messenger but its possible there's more at play than just the cute little hot air mover in the cab..
"You'd think that, but it's not. It's mechanical clutch based fan powered off the coolant pump on the motor. When the fan engages, it takes power from the motor to spin faster and cool things down, as well as adding additional load to the engine so it takes more fuel to keep the engine running at the desired RPM.

There are modern 2022 cars and trucks with the same mechanical clutch fan system on them to keep them cool, this game is, i'd imagine 70's 80's at best based on the look of the tech, at that time it was super common to keep the mechanical clutch based fan especially on cheap workhorse units.

Originally posted by maxine:

Originally posted by jomardi972:

"Cool down the engine
Increase fuel consumption by 30%
Reduce power output by 20%
Make a wooshing sound"

:smily: https://www.nexusmods.com/derailvalley/mods/113

Increase fuel consumption by 30%? It's a fan, not an AC compressor.

I imagine its an industrial version of the compressor in a car air con system (albeit functioning in a different way but requiring power of some kind nevertheless). These do have a marked fuel efficiency penalty, especially on older cars, so goodness knows what a massive engine cooling fan might require.. as stated, Im not at all familiar with loco design so just putting this out there.

On a side note the fuel issue is interesting. The fact that we worry about it at all is a little unusual. I dont recall too many shunters that Ive seen around the railyards here in the UK worrying as they sit idling for what seems like hours..

[maxine]

Originally posted by Sunscreen:

Not my quote and needs fact checking as Im not familiar with locomotive design but this is a comment from the mod page. Dont shoot the messenger but its possible there's more at play than just the cute little hot air mover in the cab..
"You'd think that, but it's not. It's mechanical clutch based fan powered off the coolant pump on the motor. When the fan engages, it takes power from the motor to spin faster and cool things down, as well as adding additional load to the engine so it takes more fuel to keep the engine running at the desired RPM.

There are modern 2022 cars and trucks with the same mechanical clutch fan system on them to keep them cool, this game is, i'd imagine 70's 80's at best based on the look of the tech, at that time it was super common to keep the mechanical clutch based fan especially on cheap workhorse units.

Originally posted by maxine:

Increase fuel consumption by 30%? It's a fan, not an AC compressor.

I imagine its an industrial version of the compressor in a car air con system (albeit functioning in a different way but requiring power of some kind nevertheless). These do have a marked fuel efficiency penalty, especially on older cars, so goodness knows what a massive engine cooling fan might require.. as stated, Im not at all familiar with loco design so just putting this out there.

Even then, spinning a small fan doesn't take 20% of engine power and 30% more fuel. That's stupid.

[Sunscreen]

Like I said, dont shoot the messenger I dont think the mod is about the small fan. I think its about a much larger fan ;)

[HuskyDynamics]

Originally posted by Sunscreen:

Like I said, dont shoot the messenger I dont think the mod is about the small fan. I think its about a much larger fan ;)

Yeah, reading the mod description I think it's for a radiator (engine cooling) fan and not the little cab fan.

[maxine]

Originally posted by HuskyDynamics:

Originally posted by Sunscreen:

Like I said, dont shoot the messenger I dont think the mod is about the small fan. I think its about a much larger fan ;)

Yeah, reading the mod description I think it's for a radiator (engine cooling) fan and not the little cab fan.

My point still stands. A "small" fan for cooling the engine doesn't take 20% engine power. Besides that, the engine is no longer the part that's overheating since the Simulator update. It's the traction motors.

[Sunscreen]

Originally posted by maxine:

Originally posted by HuskyDynamics:

Yeah, reading the mod description I think it's for a radiator (engine cooling) fan and not the little cab fan.

My point still stands. A "small" fan for cooling the engine doesn't take 20% engine power. Besides that, the engine is no longer the part that's overheating since the Simulator update. It's the traction motors.

For off road machinery but the principle of cooling fans is consistent in diesel engines. Its probably worth providing some data to back up assertions. Im not making any, simply questioning yours ;)
"Fan input power of a typical Tier 3 machine-
• A typical Tier 1 emissions legal, off-highway cooling fan requires 5% to 8% of the rated
engine output power at rated fan speed. If we assume 6.5% to the fan, at 60% load factor,
the fan consumes 11% of the total machine fuel consumption.
• A typical Tier 2 emissions legal off-highway cooling fan requires 8% to 12% of the rated
engine output power at rated fan speed.
• Tier 3 engines are expected to have 20% higher jacket water heat rejection than their Tier
2 counterparts This would increase the cooling system heat load by 10%. If heat
exchanger type and size, and allowable temperatures are kept constant, then the fan
airflow (and speed) would have to increase by 15%. Fan input power is a cubic function
of speed, so fan input power would increase by 1.153, or 52% above Tier 2. This would
increase fan input power to 12% to 18% of engine rated output power. We will assume
the fan input power, on the average increases to 15% of the engine output power.
• If the machine is operating at a load factor of 60%, the fan input power represents 25% of
the total fuel consumed by the machine "

Source-
https://www.osti.gov/servlets/purl/1028966

Some interesting overview material-
https://www.trains.com/trn/railroads/locomotives/locomotive-radiators-keep-engines-cool/

Some more interesting numbers from a pdf that can be found by looking up Ways to increase the energy efficiency of locomotives-
"In addition, up to 6% of the consumed diesel
fuel to drive the cooling fan traction electric
motors, which operate in a stationary mode,
regardless the position of controller driver and
operation of traction electric motors. 4 - 5% of the
effective power is spent on fan drive cooling
system of the locomotive."

Fundamentally though this is morphing into a discussion about a mod which has been made in such a way that fuel efficiencies are set to a certain level, and so perhaps if you feel its not accurate you should find the link to it above and comment directly to the mod maker who can possibly provide data. Here the conversation initially was about the small in cab fan placed for physiological comfort. Perhaps we should return to that..

[HUDoff••|972]

Originally posted by maxine:

Originally posted by jomardi972:

"Cool down the engine
Increase fuel consumption by 30%
Reduce power output by 20%
Make a wooshing sound"

https://www.nexusmods.com/derailvalley/mods/113

Increase fuel consumption by 30%? It's a fan, not an AC compressor.

Ask devs from moders ))

[HUDoff••|972]

the end of the end, I gave you alternative food for thought