  Recently it has been proposed to use colliding drops for producing advanced
particles or well defined capsules, or to perform chemical reactions where the
merged drops constitute a micro-reactor. For all these promising applications
it is essential to determine whether the merged drops remain stable after the
collision, forming a single entity, or if they break up. This topic, widely
investigated for binary drop collisions of miscible and immiscible liquids, is
quite unexplored for ternary drop collisions. The current study aims to close
this gap by experimentally investigating collisions of three equal-sized drops
of the same liquid, arranged centri-symmetrically. To do this, three drop
generators are simultaneously operated to obtain controlled ternary drop
collisions. The collision outcomes are observed on photographs and compared to
those of binary collisions. Similar to binary collisions, a regime map is
built, showing coalescence and bouncing as well as reflexive and stretching
separation. Differences are observed in the transitions between these regimes.
