Gas turbine engine with high speed low pressure turbine section and bearing support features

A gas turbine engine comprising:

• a fan, and an outer housing surrounding the fan to define a bypass flow path;
• a compressor section in fluid communication with the fan, the compressor section including a low pressure compressor and a high pressure compressor;
• wherein a bypass ratio is defined as a volume of air passing into the bypass flow path compared to a volume of air passing into the compressor section, and the bypass ratio is greater than 10;
• a turbine section including a fan drive turbine and a high pressure turbine;
• wherein the gas turbine engine is a two-spool engine including a low spool having an inner shaft and a high spool having an outer shaft that drives the outer shaft, the inner shaft being concentric with the outer shaft such that the inner and outer shafts are rotatable about an engine central longitudinal axis;
• a geared architecture including an epicyclic gear train, the epicyclic gear train between the fan and the inner shaft driven by the fan drive turbine such that the fan rotates at a lower speed than the fan drive turbine;
• wherein the outer shaft is supported on a first bearing in an overhung manner, including the first bearing mounted on an outer periphery of the outer shaft at a location that is upstream of a point where the outer shaft connects to a hub carrying turbine rotors associated with the high pressure turbine;
• wherein the fan drive turbine has a first exit area at a first exit point and is rotatable at a first speed, and the high pressure turbine has a second exit area at a second exit point and is rotatable at a second speed, the second speed being faster than the first speed;
• and
• wherein a first performance quantity is defined as the product of the first speed squared and the first exit area, a second performance quantity is defined as the product of the second speed squared and the second exit area, and a performance ratio of the first performance quantity to the second performance quantity is between 0.8 and 1.5.