Ausroc IV is presently the final stage of the Ausroc Programs. It is a proposed micro-satellite orbital launch vehicle to be constructed by clustering four Ausroc III vehicles (as the first stage) around a fifth vehicle which forms the second stage. The third stage is to be a solid fuel rocket motor. A significant amount of design and other work for Ausroc IV has been undertaken since 1990 in parallel with Ausroc III.

In 1996 ASRI acquired a number of Wedgetail third stage satellite launch vehicle motors from overseas. These motors are ideally suited as the third stage of Ausroc IV or as the second stage of a higher performance version of Ausroc III. Development of a composite solid fuel propellant composition for the Wedgetail motors (shown below) has been completed by Adelaide University.

Configuration

Preliminary discussions with the UK based ASPIRESPACE organisation, which has similar objectives and charter to ASRI, have resulted in positive steps being made towards the collaborative development of Ausroc IV. Under the collaborative arrangement, ASPIRESPACE will provide the complete second stage module and assistance with the third stage hardware.