Side coupled Cavities are good candidates for proton accelerations in the 90-180 MeV range, as it has been first proposed for the CERN LINAC4 project. This is not a new technology used, for example, for the Spallation Neutron Source (SNS). The goal for HIPPI was the development of technical knowledge about it. We summarize here the theoretical and experimental studies. This work is not completed and tuning procedures are under study and must be proven on the prototype. - 1