About a week ago I ran across some info on this tank somewhere on the Landships forum, and I recall there was another term used, but can't recall what it was. I'm considering building a "what-if" recovery Whippet and am trying to locate a suitable winch. I'll attach the photo I found here, which shows a small A-frame boom on the front, and a really huge mother of a winch on the back.
I've added an image of an early logging tractor, also with an A-frame boom, but with an interesting structure at the rear - including a small concrete counterweight. Since this will be a what-if build, as James Brown said, "make it funky". In that vein, I have an image of a mock-up incorporating a post-WWI lattice-type boom. This is long enough that it might become an armored/armed crane, rather than a recovery tank. Part of what motivates me is the partial similarity of the Whippet "cab" to those of early Bucyrus / Ruston cranes. I also tend to see the Whippet cab more as an interesting piece of Cubist sculpture - with all those angles and planes - than anything else. My most sincere appologies to anyone I may offend.
Marine winches I've looked at on ship model sites look wrong, but model railroad manufacturers seem a bit more promising. I well realize that it's unlikely I'll find one at all similar to this, and it's possible that a 1:48 winch might actually work out better given the size of the Whippet "cab". I'm in the U.S., but will consider British and other European sources if anyone has recommendations