A Historical Overview

1
T-28 Instrumentation
A Historical Overview
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T-28 InstrumentationPosition/Attitude/Velocity
Initial Final Absolute Position VOR/DME GPS Storm
-relative Tracking radar Telemetered
GPS Altitude Static pressure Static pressure
(radar altimeter) Attitude Pitch/roll
gyro Pitch/roll gyro Angle of attack Heading Mag
netic HSI Speed Dynamic/static p Dynamic/static
p Time Internal clock GPS
3
T-28 InstrumentationState Variables

• Initial Final
• Temperature Rosemount Rosemount
• Reverse-flow Reverse-flow
• Pressure Static p Static p
• Humidity None None

4
T-28 InstrumentationWinds

• Initial Final
• Vertical Rate-of-climb Kopp equation
• (corrected for (pitch, static and
• airspeed, engine dynamic pressures)
• power variations)
• Horizontal None None
• Turbulence Fluctuations in Fluctuations
  in dynamic p dynamic p
• Accelerometers Accelerometers

5
T-28 InstrumentationMicrophysics
Initial Final Cloud water J-W heated wire DMT
(King) heated wire (Rosemount icing
rate) Cloud particles Formvar replicator PMS
FSSP Precipitation Foil impactor PMS OAP
(2D-C) Particles Cannon camera HVPS Hail Foil
impactor HVPS Windscreen microphone Hail sensor
(OAP) Windscreen microphone
6
Foil Impactor
7
HVPS
8
Hail Sensor
9
T-28 InstrumentationElectrification
Initial Final Electric fields None Field mills
(6) Particle charge None (HVPS charge plates)
10
T-28 InstrumentationChemistry
Initial Final Tracer gas None (SF6
analyzer) NO / NOx None TEI analyzer
11
Sniffer mist
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T-28 InstrumentationExperimental(partial list)
Total water Kyle evaporator Temperature K-probe
Particle catchers Various X-rays X-ray detector