An Engineering Model (EM) of a Miniature Pulse Tube Cooler (MPTC) has been designed, manufactured and tested in partnership between AL/DTA, CEA/SBT and THALES Cryogenics. Prior to the EM manufacturing, a development phase was performed with an in-line architecture for the cold finger and using an existing flexure bearing compressor from THALES Cryogenics. The optimized development model pulse tube cooler demonstrated a cooling capacity of 1 W at 82 K with 25 watts PV work and 288 K heat rejection temperature. Based on this experience, the EM cooler reported on here has been designed and manufactured with a U-shaped architecture to provide a more compact cooler for improved integration. In this paper, thermal and mechanical test results for the new EM cooler are presented and analyzed for various heat sinking temperatures, input powers, and orientations.