Part 2
There are two ways to do this :
1. Hand Controller Method:
Set the Entrance Block, the Reversing Loop Block , and the Exit Block power color all the same.
Use the same color hand controller, (matching the power color), for Entrance Block, Exit Block and Reversing Loop Block power and direction control.
While the powered unit is in the Reversing Loop Block, change the direction switch on the hand controller before the powered unit crosses the gap to the Exit Block.
2. Reverse Loop Method:
Set the Entrance Block and the Reversing Loop Block to the same power color, and the same direction.
Set the Exit Block power color to a different color and the direction switch to the opposite direction of the Entrance Block.
While the powered unit is in the Reversing Loop Block, change the power color for the Reversing Loop Block (on the control panel) to match the Exit Block power color, before the powered unit crosses the gap into the Exit Block.
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Reversing Loop physical boundary identifications (Mainline operation) – all proceding counter-clockwise
CODE B - Garcia (West Loop) – from before the bridge to just before the tunnel entrance.
CODE C - Tijuana (South Loop) – from just before the entrance to the tunnel by the window to just before the exit from the tunnel in front of the bridge.
CODE D - El Centro (East Loop) - from the farm house by the wall to the switch past the silos.
CODE E - Rose Canyon (North Loop) from the beginning of the draw-bridge crossing to the exit of the draw-bridge crossing going in the opposite direction.
NOTE: All power and direction switching must be done while the powered unit is in the Reversing Loop before it crosses the gap exiting the Reversing Loop for either method.
BE SURE TO RESET SWITCHES AFTER EXITING FOR THE NEXT TRAIN COMING IN.
SAN DIEGO MODEL RAILROAD CLUB Mainline Reverse Loop Configurations. Each Configuration shows 4 Block Gaps numbered 1,2,3, &4. Blocks are 1 to 2 (Entrance), 2 to 3 (Rev Loop), & 3 to 4 (Exit).
Note: ALL power and direction switching must be done while the Powered Units are in the Reversing Loop, before it crosses the gap exiting the Reversing Loop Block for either method.
link:
http://www.sdmrrc.org/Odds-n-Ends/reverse.htm