This was another one of the 2nd. Edition Terminator sculpts by Jes Goodwin, and was part number 70157/1 or 010103601.


This guy was Dimshade and Thaw in the early days and was later shown in the catalogues as Chainsword 1, part number 070119/22. He is a Bob Naismith sculpt, and shares most of his head sculpt with Breakout Con. It looks like 1987 on the tab.
You can see him in WD93:
The Whirlwind was first discussed in White Dwarf #117 – from the Rogue Trader era – in an article by Rick Priestly with a following article by Tony Cottrell discussing how to convert a Rhino into a Whirlwind, since there was no official model at the time.
The conversion:
The studio staff painted two which were featured in that WD:
The back page of that issue shows one in action:
In 2nd. Ed. there was an official model:
More to come.
This guy was part number 0051/3.