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Pz 1 Bison Self Propelled Sig 33 - 28mm / Pz1 野牛自行火炮Sig 33-28毫米
Pz 1 Bison Self Propelled Sig 33 - 28mm
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by deweycat

This is a 28mm rendition of the German "Bison" SPG mounting the 150mm howitzer. It was built on the hull of a Pz Mark 1(b) light tank and first used in the invasion of France.

I started with several of Tiger Ace's files, I used the hull of his Pz 1(b), used the actual Sig 33 from his German Heavy Artillery bundle, and reworked the armoured cab of his Bison. from there I up-scaled it all to 28mm,
and'

  • separated the tracks from the hull structure and made them a separate file.

  • separated the gun barrel from the gun carriage, and created a matching male/female protrusion/recess in each

  • separated the gun carriage wheels from the gun carriage, and added matching "nubs" and recesses to allow rejoining, post print

  • added a bore at the end of the barrel

  • built a mounting structure for the gun carriage on the hull; this literally "locks into" the hull.

  • worked up the armoured superstructure, including adding the side "hinged wings"

The model in the pics is my test print. It has not been glued; the pieces are tight enough to lock in just with a "press fit". you will have to glue them together of course, but alignment shouldn't be an issue.
As always, be careful removing the support material
The tracks will fit recesses in the hull, to ease proper assembly.
Test fit before applying glue and assembling.

I printed this at the request of a friend from out club. I do not field any German forces, so it is not yet painted. I was surprised that the model turned out the size it did (just over 83 mm) but the length is exactly 1/56th of  this vehicle's length as described in Tank Encyclopedia (4670mm divided by 56 = 83.3mm). If anyone feels the scale isn't correct, please feel free to adjust as you feel necessary.