The red bull

The Last Unicorn was invented by the novelist Peter Soyer Beagle in 1968. The novel was adapted as an animated film in 1982. The model is a replica of the red bull, one of the antagonists of the story. The bull was designed entirely in ZBrush.

The last unicorn is already available as a from me.

This is a fan project and I don't own the copyright for the figure. That's why I'm making it available here free of charge because I really enjoy the model and I'm happy to this on.

If you like the model, I am very happy about any donations (there is a link in my profile). This would also motivate me to make further adaptations of well-known figures.

As with the unicorn, I set myself the goal of needing as little as possible for the individual parts. Because, quite honestly, removing s and reworking the imperfections is annoying.

Unlike my unicorn, I deviated from my self-imposed requirement of not using glue. I tried a few experiments on the model with simpler plug-in connections. Some were more successful, others less so. That's why some parts have to be glued.

However, I have now found a really good glue that works very well with PLA and makes my life easier. I have a recommendation below.

Assembling the bull is not really complicated. First, the hind legs and the hips are ed together using rectangular split pins and then plugged together with the torso. In my case they hold quite well without glue, but this will certainly not be the case with all Printer configurations. I therefore still recommend gluing them in addition.

The two flames with the cut-out are glued to the tail first and then the two smaller flames are glued to the outside again.

Then simply insert the tail into the existing hole at the hip. Here, too, I recommend gluing it in place.

The hooves are inserted into the existing holes in the legs. Unfortunately, this trapezoidal connection does not hold so well by itself and so they have to be glued.

On the head, the eyes are first inserted over the holes for the horns. These should be able to be inserted completely without much pressure.

The ears and tongue are simply plugged in and the horns reconnected to the head using the rectangular split pins.

The teeth are then inserted into the upper jaw.

The teeth are also inserted into the lower jaw and the lower jaw is then inserted into the existing opening in the head.

The head can then be reconnected to the rest of the body with a rectangular split pin.

Finally, the two back flames are inserted into each other and then inserted into the bull from above. These are only loosely connected to each other but

if the bull is not transported a lot then they do not need to be glued.

And that's it :-).

If there are any problems with the printing of individual parts or if you have any other questions, just send me a short message.

I will try to answer as soon as possible.

Have fun with the model and Happy Printing

As a good adhesive for PLA, I can recommend the assembly adhesive from Pattex "Kleben statt Bohren".

Unlike normal superglue, it does not dry out in the tube and the glued parts hold together really well.

I think the English version is called "No more Nails"

41 parts are required, all of which can be printed with a 0.4 nozzle.

I used my Snapmaker 350 and my Cetus II and the latest Prusa Slicer 2.7.4 as slicer software

Recommended layer thicknesses

large parts : 0.20 - 0.24

small parts : 0.12 - 0.16

If all parts are printed with the same infill settings, the center of gravity of the bull is such that it stands well on its three legs.

To push this even further, you can print the two hind legs and the hips with a denser infill to shift the center of gravity even further back.

Printing the model smaller is probably also feasible.

The limit for this is probably the teeth, which are the smallest parts.

For this you would probably need a smaller nozzle or you could print the teeth using a resin printer.

Models that are needed more often:

10x Bull - tooth (also available as a combined model "Red Bull - x10 tooth")

7x Bull - rectangular splint pin

4x Bull - hoof

The file name of the individual files also contains whether I recommend or consider a brim or to be necessary.

All other files are printable without brim and s. The files are all saved in the print orientation as I have printed them.

Models that require partial s:

Bull - torso - the bent leg and the back need

Bull - back flame 1 & 2 - the cut-out for the head requires

Bull - R & L tail flame 1 - the recess for the tail needs

For very small parts like the teeth, I recommend printing several of them next to each other and also printing a larger part of at least the same height so that the printer gives the layers some time to cool down.

The split pins should be pluggable without any problems, but if not, you can try to scale them up or down a few percentage points accordingly.