Complex sentence: Another widely used form of flat engine consists of a straight engine with two, three, four or more cylinders canted 90 degrees into the horizontal plane, however this is not generally considered significantly different from other straight engines.
Split into simpler sentences: Another widely used form of flat engine consists of a straight engine with two, three, four or more cylinders mounted so that the cylinder axes lie in the horizontal plane. This, however, this is not generally considered significantly different from other straight engines.