This Space Wolves Whirlwind was on display at Warhammer World.
The Whirlwind is an adaptation of the Rhino design, a lightly armoured tank chassis armed with a multiple rocket launcher system capable of raining precision fire down upon enemy positions. Thanks to its target acquisition system, the Whirlwind is able to bombard hidden or entrenched targets with incredible accuracy, often from behind the safety of cover.
Interestingly this model is about twenty years old.