Drawings

Mehmet Yayla signs his drawings with the name Raffael Bonacci. When he draws, he puts himself in Leonardo's time. His masters are Leonardo da Vinci, Michelangelo Buonarroti and Raffaello Sanzio da Urbino.

Medical

Organs

Anatomy

More Drawings -  Anatomy & Organs  ⇽ Link 

Michelangelo's David

More Drawings - Michelangelo's David ⇽ Link

Project Aircraft: Vertical Take-off and Landing (VTOL)

More Drawing - Project Aircraft VTOL ⇽ Link 

Invention: Wind Turbine VAWT