Piston compressor

During my summersemester 2018 I had to project all by myself a piston compressor,driven by a belt pulley in order to reach 9 bar compression. In total we have 4 weeks before handing in the assignement. After being more or less 13 hours a day at University and after 50 sheets of calculations I present you my result.  Note: I didn't have to construct the cylinder head, but there are the threads for the screws