1. 

   ddechamp71 TrainBoard Member

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   I know APUs on airliners, but never heard of on locomotives until now. What's the use of an APU on a locomotive, and what does it consist of ?
   
   Dom

    

   ddechamp71, Dec 14, 2020

   #21
2. 

   Randy Stahl TrainBoard Supporter

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   The APU provides battery charging and heating for the prime mover water and lube oil when the prime mover is shut down.

    

   Randy Stahl, Dec 14, 2020

   #22

   Mike VE2TRV, Kurt Moose and ddechamp71 like this.
3. 

   ddechamp71 TrainBoard Member

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   OK... And what is made with ? A small diesel engine ?
   
   Dom

    

   ddechamp71, Dec 14, 2020

   #23
4. 

   Randy Stahl TrainBoard Supporter

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   Yes. a small diesel.

    

   Randy Stahl, Dec 14, 2020

   #24

   Kurt Moose likes this.
5. 

   BoxcabE50 HOn30 & N Scales Staff Member TrainBoard Supporter

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   An APU is an Auxiliary Power Unit. They can be electric, propane, natural gas powered, or as more common and here, use gas or diesel fuels.

    

   BoxcabE50, Dec 14, 2020

   #25

   Mike VE2TRV, BNSF FAN and Kurt Moose like this.

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