Propulsive engine having a lubricant system driven by compressed air

A propulsive engine, comprising:

• a core having a compressor section and a turbine section, the turbine section drivingly engaging the compressor section via a shaft, the compressor section having a bleed outlet for extracting compressed air at a bleed pressure;
• a support structure including an engine case surrounding the core, the support structure defining bearing cavities;
• bearings located inside the bearing cavities and disposed radially between the engine case and the shaft for rollingly supporting the shaft;
• a lubricant tank having an inlet operatively connected to the bleed outlet of the compressor section and an outlet fluidly connected to the bearing cavities for lubricating the bearings, the bleed pressure being greater than a pressure inside the bearing cavities for inducing a lubricant flow from the lubricant tank to the bearing cavities;
• and
• a static pressure manifold ng a ma id idly connected to the bleed outlet and a manifold outlet fluidly connected to the inlet of the lubricant tank, the manifold inlet fluidly disconnected from the manifold outlet by a diaphragm being reversibly deformable, the bleed pressure of the compressed air transmitted to the lubricant tank via a deformation of the diaphragm.