Please modify the paragraph to be more cohesive.
The FF. 53 was a twin-engined biplane floatplane, designed to carry a torpedo and powered by two Mercedes D. IVa engines. FF. was a biplane floatplane of the Friedrichshafen G. III heavy bomber.
The FF. 53 was a twin-engined biplane floatplane, designed to carry a torpedo and powered by two Mercedes D. IVa engines. It was a development of the Friedrichshafen G. III heavy bomber.