Complex sentence: The later Pawnee D version featured twin fuel tanks mounted in the outer wing panels, further improving crashworthiness, early models of the Pawnee had a single fuel tank located between the agricultural hopper and the engine.
Split into simpler sentences: The later Pawnee D version featured twin fuel tanks mounted in the outer wing panels, further improving crashworthiness. Early models of the Pawnee had a single fuel tank located between the agricultural hopper and the engine.