Abstract: A pressure and temperature measuring probe with a low drag, airfoil shaped cross section includes a longitudinally extending pressure cavity adjacent the leading edge and a separate longitudinally extending temperature cavity immediately downstream thereof. Longitudinally spaced apart passages extend downstream from their inlets at pressure measuring stations along the leading edge and intersect the pressure cavity. At temperature measuring stations along the leading edge passages extend downstream adjacent the pressure cavity to intersect the temperature cavity and direct a high velocity flow of gases over a thermocouple junction disposed within the temperature cavity. Stagnation devices at the leading edge reduce gas velocity to zero at the passage inlets.

Abstract: The inlet for a temperature measuring probe mounted in the leading edge of a strut or vane is constructed to project beyond the leading edge into the flow stream being measured and having the end scarfed in the direction of the flow stream. This measuring probe has particular utility where the flow direction changes as in gas turbine power plant.

Abstract: A detector-transducer 26 for sensing temperatures in an engine is disclosed. A temperature signal generated by a temperature sensing device 28 is biased by a supplementary thermocouple 30. A resistor 52 is in series with the temperature sensing device. The supplementary thermocouple is in parallel with the resistor 52. In one embodiment the temperature sensing device is the junction of a second thermocouple.

Abstract: A pressure probe 26 for sensing total pressure in a duct 16, 22 bounding a flow path 12 for a working medium fluid is disclosed. The probe has an alignment portion 32, a sensor portion 34 spaced from the alignment portion leaving a plenum 36 therebetween and passageways 41 for ducting the flow away from the plenum. In one particular embodiment a transition passageway 54 extends between the plenum and the passageway 41. The alignment portion has a first passageway 42 directed towards a second passageway 40 in the sensor portion. The sensor portion has a wall 38 disposed about the second passageway 40.