Apparently the Virginian, when it ordered its EL-C (rectifier hood unit) locomotives from General Electric, asked that they be capable of operating in multiple with its somewhat older General Electric EL-2 (streamlined two-unit motor-generator) locomotives.
Did they in practice use locomotives of the two types in m.u. together?
(Question raised by discussion of Pennsy GG-1 m.u. operation on the "General Electric" forum. Note that in the later years of its electric operation, the CMStP&P regularly operated diesels and electrics in m.u.: the railroad designed and built equipment that allowed its electric locomotives to "impersonate" diesels so they could order other diesels around by m.u. And the PRR's E-2b (post-WW II AC-motored cab units from General Electric: the Alco-FA lookalikes) could m.u. with its P5a locomotives.)
Did they in practice use locomotives of the two types in m.u. together?
(Question raised by discussion of Pennsy GG-1 m.u. operation on the "General Electric" forum. Note that in the later years of its electric operation, the CMStP&P regularly operated diesels and electrics in m.u.: the railroad designed and built equipment that allowed its electric locomotives to "impersonate" diesels so they could order other diesels around by m.u. And the PRR's E-2b (post-WW II AC-motored cab units from General Electric: the Alco-FA lookalikes) could m.u. with its P5a locomotives.)