The Warrigal II (Warrigal being aboriginal for untamed) was a development of the Warrigal I, and was also built at Randwick.

The FK-8 was a two-seat reconnaissance and bombing aircraft which, first flown in May 1916, was designed to perform the same function as the Royal Aircraft Factory’s RE-8. A development of the FK-3, the FK-8 was built in some numbers, approximately 1,500 aircraft being completed.