R/C Bismarck and a waterpump yet

**Bismarck battleship**

That will be an 1 metre long, bluetooth controlled model of the Bismarck battleship by german naval forces in 1939.

**What are the planned features?**

- 1 metre length ✔
- good printabillity
- at least one artillery should be turnable and "shoot" water
- bluetooth control with android smartphone
- easy to build electronics
- cheap as possible
 
- print it once in a while?

These are just bad weeks for this challenges,

- printer