Simplify the following text for a Grade 11 native English-speaking person.
Original: These differences were the external effect of DP2 being totally different from the twin-engined Deltics internally , being the forerunner of the Class 50 .
Simplified: These differences revealed that DP2 was totally different from the twin-engined Deltics internally , having only a single prime mover and generator . The loco was later updated with electronic control systems to become the forerunner of the Class 50 .