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An in-flight investigation of a twin fuselage configuration in approach and landing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Weingarten, N. C. |
| Copyright Year | 1984 |
| Description | An in-flight investigation of the flying qualities of a twin fuselage aircraft design in the approach and landing flight phase was carried out in the USAF/AFWAL Total In-Flight Simulator (TIFS). The objective was to determine the effects of actual motion and visual cues on the pilot when he was offset from the centerline of the aircraft. The experiment variables were lateral pilot offset position (0, 30 and 50 feet) and effective roll mode time constant (.6, 1.2, 2.4 seconds). The evaluation included the final approach, flare and touchdown. Lateral runway offsets and 15 knot crosswinds were used to increase the pilot's workload and force him to make large lateral corrections in the final portion of the approach. Results indicated that large normal accelerations rather than just vertical displacements in rolling maneuvers had the most significant degrading effect on pilot ratings. The normal accelerations are a result of large lateral offset and fast roll mode time constant and caused the pilot to make unnecessary pitch inputs and get into a coupled pitch/roll oscillation while he was making line up and crosswind corrections. A potential criteria for lateral pilot offset position effects is proposed. When the ratio of incremented normal aceleration at the pilot station to the steady state roll rate for a step input reaches .01 to .02 g/deg/sec a deterioration of pilot rating and flying qualities level can be expected. |
| File Size | 3544044 |
| Page Count | 98 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850005492 |
| Archival Resource Key | ark:/13960/t48q0vh53 |
| Language | English |
| Publisher Date | 1984-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Cues Aircraft Landing Transport Aircraft Visual Stimuli Aircraft Control Flight Characteristics Pilot Performance Approach Aircraft Maneuvers Fuselages Roll Aircraft Configurations Flight Simulation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
