Stone Age
Propellants tests

Bronze Age
First hot tests

Iron Age
First successful test

Middle Age
Ablative chamber tests

Renaissance
PEPEk1 - 1kN pump-fed bi-propellant engine development

Early Modern History
PEPEk1 - 1kN pump-fed bi-propellant engine successful test

RRDD - Reusable Rocket Drone Demonstrator
small, low cost testing platform for functionality verification and optimization

PEPEk-30
Rocket Engine

Czech Sparrow
Reusable SSO and LEO launcher