A counter-rotating differential electric motor assembly (5; 100); comprising: a. a central hollow shaft (35; 135) having first and second ends; b. a first rotational member (10, 12; 110, 112), located about said central hollow shaft (35; 135), that rotates in a first direction about said central hollow shaft (35; 135); c. a second rotational member (20, 25; 120, 125), located between said first rotational member (10, 12; 110, 112) and said second end of said central hollow shaft (35; 135), that rotates in an opposite direction to said first rotational member's rotational direction and about said central hollow shaft (35; 135); d. electromagnetic field coils (14; 114) and permanent magnets (27; 127) associated with said first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members for powering, when receiving electricity via wires (60; 160) traveling from an exterior power source (62; 162) through said central hollow shaft (35; 135), said rotation of said first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members in opposite directions about said central hollow shaft (35; 135); e. a slip ring assembly (50; 150) for transmitting electricity from said exterior power source (62; 162) to said electromagnetic field coils (14; 114), wherein said slip ring assembly (50; 150) is located about said central hollow shaft (35; 135) and either within said first and second rotational members or between said first rotational member and said first end of said central hollow shaft ; and f. a base member (40; 140) for mounting said oppositely rotating first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members, said slip ring assembly (50; 150), and said central hollow shaft (35; 135) to a supporting structure, wherein said base member (40; 140) is located proximate said second end of said central hollow shaft (35; 135). a. a central hollow shaft (35; 135) having first and second ends; b. a first rotational member (10, 12; 110, 112), located about said central hollow shaft (35; 135), that rotates in a first direction about said central hollow shaft (35; 135); c. a second rotational member (20, 25; 120, 125), located between said first rotational member (10, 12; 110, 112) and said second end of said central hollow shaft (35; 135), that rotates in an opposite direction to said first rotational member's rotational direction and about said central hollow shaft (35; 135); d. electromagnetic field coils (14; 114) and permanent magnets (27; 127) associated with said first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members for powering, when receiving electricity via wires (60; 160) traveling from an exterior power source (62; 162) through said central hollow shaft (35; 135), said rotation of said first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members in opposite directions about said central hollow shaft (35; 135); e. a slip ring assembly (50; 150) for transmitting electricity from said exterior power source (62; 162) to said electromagnetic field coils (14; 114), wherein said slip ring assembly (50; 150) is located about said central hollow shaft (35; 135) and either within said first and second rotational members or between said first rotational member and said first end of said central hollow shaft ; and f. a base member (40; 140) for mounting said oppositely rotating first (10, 12; 110, 112) and second (20, 25; 120, 125) rotational members, said slip ring assembly (50; 150), and said central hollow shaft (35; 135) to a supporting structure, wherein said base member (40; 140) is located proximate said second end of said central hollow shaft (35; 135). <EOS>