Complex sentence: Volume production of the "Airline" Sedan was planned for 1935 but the marque died with Sir Charles Kingsford Smith, The Chairman, who was in the process of raising additional capital at the time of his disappearance over the Bay of Bengal.
Split into simpler sentences: Volume production of the "Airline" Sedan was planned for 1935 but the marque died with the Chairman, Sir Charles Kingsford Smith. Kingsford-Smith was in the process of raising additional capital at the time of his disappearance over the Bay of Bengal.