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This aircraft has been modified to become a flying physics laboratory and research aircraft for the following areas of investigation:
- Icing Cloud Characterization
- Natural Icing Physics Studies
- Source of Validation Data
- Full scale iced aircraft aerodynamics
- Ice protection development
Capabilities
Flight Research for Atmospheric Conditions: Measure atmospheric conditions such as Supercooled Large Droplet (SLD) to characterize for icing simulation tools - Measure atmospheric conditions as in situ data for correlation with remote sensing technology (MWISP, AIRS).
Flight Research for Natural Ice Accretions: Correlate natural ice shapes to NASA's simulation tools (Icing Research Tunnel, LEWICE computer software codes) - Wing Stereo camera system provides full scale ice shape documentation capability.
Flight Research for Full-Scale Iced Aerodynamics: Improve understanding of full-scale, full aircraft aerodynamics (Ground-based icing flight simulator development, Smart icing systems development, Pilot/Operator training products, Aero icing codes).
Instrumentation
The twin otter has been modified to allow for extensive icing research capabilities:
- Meteorological
- Droplet Sizing: -FSSP, OAP-200X 1-DC, OAP-260X 1-DC, OAP-2DC-Grey
- Liquid water Content: CSIRO-King, Nevzorov LWC/TWC
- Temperature: Total, static, dew point
- Imaging
- Wing stereo camera system
- Tail video
- Over wing video
- Wing leading edge video
- 35mm stills
- Hi-8 video
- A/C Aerodynamics
- Accels, rates, attitude
- Control surface positions
- Pilot force/hinge moment
- Prop RPM, torque
- Fuel flow (mass)
- GPS position
- Pressure belts
- Tail flow probes
- Wake survey
- Boundary layer
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