﻿ Funcubing - The Blanker Family

# Funcubing: The Blanker Family

## The Original Blanker Cube

The Original Blanker Cube is a simple shapemod of a 2×2×2 cube by extending it by one layer of cubies at three adjacent faces. This creates the effect of being a 3×3×3 Cube.

The modification uses four different types of cubies: 1×1×1, 1×1×2, 2×2×1 and 2×2×2. The mechanism is based on a 3×3×3 ball core with three blocked edge pieces. This allows mixing the different corner pieces is any way, without mechanical restrictions.

 The Blanker Family

## Blanker Cube Modifications

The four different types of cubies allow different cubic and cuboid arrangements.

Please note that a 2×2×2 cube has no permutation constraints, but still has orientation constraints. If there is at least one symmetric corner piece, any corner orientation is possible. If there is no symmetric corner piece, the overall count of corner twists must be a multiple of three.

Variant Volume  1×1×1 1×1×2 2×2×1 2×2×2 Notes
3×3×3 27 1 3 3 1 original 3×3×3 Blanker Cube
2×2×2 8 8 no shape change
2×2×3 12 4 4
2×2×4 16 8 orientation constraint
3×3×2 18 2 4 2
2×3×4 24 4 4 orientation constraint
3×3×4 36 2 4 2
4×4×2 32 8 orientation constraint
4×4×3 48 4 4
4×4×4 64 8 no shape change

The number of pieces for the seven non-trivial variants add up to six of each of the cubic cubies, and 22 of each of the irregular cubies. This means that you need eight Blanker Cubes to create the seven non-trivial variants. With the remaining eight pieces, two of each kind, you can't create a regular shape, so you end up with either some spare parts, or a  Blankenstein Cube .

 Blanker Cube Assembly Setup

## Notes on Assembly

As mentioned before, the mechanism is based on a 3×3×3 ball core with three blocked edge pieces. All of the Blanker Cubes I disassembled had the 2×2×2 corner piece blocked. For easier assembly, a center piece not adjacent to the blocked piece should be removed. Be careful to prevent the screw and spring from popping across the room.

Disassembly is fairly easy, just peel off all of the loose parts. One corner piece and three edge pieces will stay attached to the ball core. The three edge pieces are blocked by tabs on the center cross. You should now have removed a screw, a spring, a center plate, seven corner pieces, and nine edge pieces from the core.

The following steps worked best for me to assemble a cube.

• If you do not need the blocked corner piece for your setup: Loosen a center adjacent to the blocked piece and exchange the blocked corner piece with one that you need for the current setup. Re-tighten the respective screw.
• Add three corner pieces and respective edge pieces around the core to get one layer and a rim (left side of the photo).
• Arrange the other four corner pieces on the table and secure them with rubber bands (right side of the photo).
• Drop the center plate in the middle in proper orientation.
• Add the four remaining edge pieces.
• Put the part with the core upside down onto the other half and turn the whole cube over.
• Skew the layers to expose the hole of the center plate. The rubber bands allows for the movement, while keeping the pieces together.
• Insert the screw with the spring and tighten it to a suitable level.

Now you can enjoy your Blanker Cuboid. Once you are familiar with the steps, assembly is a ten-minute job, or even less.

Note: The photo shows the assembly of the remaining eight pieces not making a proper Cuboid, but a "Blankenstein Cube" instead.

## Gallery

### Blankenstein

If you build the seven Blanker Cuboids from eight Blanker Cubes, there are eight pieces left. You can either leave them as spare parts, or build one odd Blanker Cube.

 "Blankenstein" - The Eight Remaining Pieces