Thus a flat Earth would mean that the Sun was 235 Million Km away not 149.6 Million Km. To answer your original question, I have seen two schools of thought in the FE community attempting to explain Lunar eclipses. One school says that there is an unknown object which occasionally gets between the Sun and the Moon. read more
One of the most asked questions about the Flat Earth is how Eclipses work on the flat earth model. This topic is even more popular now because of the soon coming total solar eclipse on August 21, 2017, across North America. read more