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HUD Guidance for the ASKA Experimental STOL Aircraft using Radar Position InformationThe paper describes a high performance HUD guidance system installed on the experimental powered-lift STOL aircraft Aska. Since the maiden flight in October 1985, the HUD system has been used in all the flight tests. The HUD has an accurate flight path symbol generated by inertial velocity from the IRS which is updated by up-linked precision radar position data. The flight path symbol is very useful for precise approach and flare control for Aska which has large ground effects. A synthetic runway is also presented, which is conformal with the real runway, using the position data from the ground tracking radar system. Under instrument meteorological conditions, the pilot can approach and land using the HUD synthetic runway as well as in visual meteorological conditions. The HUD system proved to be a valuable aid to the pilot for all the Aska flight tests. A NASA Ames Research Center test pilot demonstrated touch down accuracy of less than 8 meters (peak to peak) for a series of three landings.
Document ID
Document Type
Conference Paper
Yazawa, Kenji
(NASA Ames Research Center Moffett Field, CA, United States)
Terui, Yushi
(National Aerospace Lab. Chofu, Japan)
Hardy, Gordon H.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
April 1, 1992
Subject Category
Aircraft Communications And Navigation
Report/Patent Number
SAE PAPER 921041
Meeting Information
SAE, Aerospace Atlantic Conference(Dayton, OH)
Accession Number
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