Challenger of Locomotive 143 



found to provide the simplest and the most 

 economical method of control. 



Other points in which motor coach 

 operation differs from that of the locomotive 

 is found in certain details, particularly in 

 cases of multiple-unit operation. Thus it 

 may be desirable that all the operations 

 connected with starting up and shutting 

 down the Diesel engine shall be controlled 

 from any of the driver's compartments. 



This can be quite easily arranged for on 

 the driving controller, so that the operator 

 has one control only to manipulate. Two 

 additional notches are provided on the 

 master controller, and these are provided 

 with interlocks, so that they are inoperative 

 so long as the driver wishes to keep the 

 engine running. The master controller can 

 in addition be provided with the usual 

 deadman's handle, the operation of which 

 opens all the circuits, shuts down the 

 engine and applies the brakes. It is in 

 effect absolutely fool-proof, and neither 

 the engine nor the electrical equipment 

 can be overloaded. 



