A total water content probe for flight and ground based testing is under development. Previous work has demonstrated the feasibility of a naturally aspirating isokinetic probe. Current work has concentrated on developing an evaporator to vaporize the liquid and solid water content of the inlet air, while maintaining isokinetic flow and conforming to the aerodynamic, power and geometric constraints in place for flight testing. Development has involved aerodynamic modeling of the system to ensure

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... isokinetic flow at flight conditions and thermal modeling to produce a first iteration of the evaporator design. Wind tunnel testing verified the isokinetic properties of the system and the ability to vaporize the ice particles with a concentration expected to be encountered in flight.