Railpower Technologies
Green Goat Hybrid switchers

Model designation
Wheel arrangement
Build year
Total produced
Power output
Image
GGS2000D "Emerald"
B-B
2001
1 (prototype)
1,490 kW (2,000 hp)
-
GG20B "Green Goat"
B-B
2004–current
55
1,490 kW (2,000 hp)
-
GG10B "Green Goat"
B-B
2005–current
6
746 kW (1,000 hp)
-
GK10B "Green Kid"
B-B
2005–current
4
746 kW (1,000 hp)
-

Question: What is the difference between the GG20B "Green Goat" and GG10B "Green Goat" models?
Answer: The "10" or "20" in the model designation signifies 1,000 or 2,000 horsepower (746 or 1,490 kW) respectively.