Instrument Landing System Pitot Tube Rudder 
Pilot Institute
JANUARY 27, 2025
The Heading Indicator should not be confused with the Horizontal Situation Indicator (HSI), which is an evolution of the Heading Indicator that includes VHF Omnidirectional Range (VOR) and Instrument Landing System (ILS) indications. This ball is located in a tube filled with fluid and can move freely to the right and left.
Plane and Pilot
NOVEMBER 19, 2024
The 172 has a steerable nosewheel, much heavier than the rudders on my RV-9A with a castering nosewheel. Repairs included replacing the pitot tube/angle-of-attack sensor and the outside air temperature probe. Not really a problem, as the CFI and I had a great chat for an hour about things aeronautical.
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