Complex sentence: The Bristol 146 was built by Bristol to an Air Ministry order for a prototype single-seat eight-gun fighter meeting Air Ministry specification F.5/34 issued in 1934 which called for an air-cooled engine for overseas use.
Split into simpler sentences: The Bristol 146 was built by Bristol to an Air Ministry order for a prototype single-seat eight-gun fighter meeting Air Ministry specification F.5/34 issued in 1934. The specification further called for an air-cooled engine for overseas use.