Power unit fuel pressurization system

A power generating unit for use in an airframe for supplying at least emergency power to a load comprising:

• a pressurized gas source storing pressurized gas containing oxygen to be used in combusting a fuel;
• a combustor for providing pressurized gas produced by combustion of a mixture of the pressurized gas provided to the combustor by the pressurized gas source and fuel provided to the combustor by a fuel supply;
• a first turbine driven by pressurized gas produced by the combustor;
• a gear box driven by the turbine having an output shaft;
• a pair of input shafts directly connected to a fuel pump and a self-excited electrical generator comprising the load for providing an output utilized in operation of the turbine in response to rotation of either of the input shafts;
• a motor coupled to the pressurized gas source having a drive shaft which rotates in response to pressurized gas applied from the gas source;
• and
• means, coupled to the output and drive shafts, for applying driving torque to the driven element during application of pressurized gas to the combustor from the output or drive shaft, whichever is rotating at a higher velocity.

A power generating unit for use in an airframe for supplying at least emergency power to a load comprising:

• a pressurized gas source storing pressurized gas containing oxygen to be used in combusting a fuel;
• a combustor for providing pressurized gas produced by combustion of a mixture of the pressurized gas provided to the combustor by the pressurized gas source and fuel provided to the combustor by a fuel supply;
• a first turbine driven by pressurized gas produced by the combustor;
• a gear box driven by the turbine having an output shaft;
• a pair of input shafts directly connected to a self-excited electrical generator comprising the load for providing electrical power in response to rotation of either of the input shafts for use in starting the turbine;
• a motor coupled to the pressurized gas source having a drive shaft which rotates in response to pressurized gas applied from the gas source;
• and
• means, coupled to the output and drive shafts, for applying driving torque to the generator during application of pressurized gas to the combustor from the output or drive shaft, whichever is rotating at a higher velocity.

A power generating unit for use in an airframe for supplying at least emergency power to a load comprising:

• a pressurized gas source storing pressurized gas containing oxygen to be used in combusting a fuel;
• a combustor for providing pressurized gas produced by combustion of a mixture of the pressurized gas provided to the combustor by the pressurized gas source and fuel provided to the combustor by a fuel supply;
• a first turbine driven by pressurized gas produced by the combustor;
• a gear box driven by the turbine having an output shaft;
• a pair of input shafts directly connected to a driven element comprising the load for providing an output utilized in operating the turbine in response to rotation of either of the input shafts;
• a motor which is activated during pressurized gas being supplied from the gas source to the combustor to rotate a drive shaft;
• and
• means, coupled to the output and drive shafts, for applying driving torque to the driven element during application of pressurized gas to the combustor from the output or drive shaft, whichever is rotating at a higher velocity.