Atlas / Learn / Papers / 19850024805
NASA NTRS · Technical Memorandum (TM)
Flutter clearance of the Schweizer 1-36 deep-stall sailplane
Attribution
This is the abstract and citation. Full text lives at NASA NTRS — we link out rather than host. All credit to the authors and Legacy CDMS.
Abstract
Verbatim from NASA NTRS. Not paraphrased, not summarized.
A Schweizer 1-36 sailplane was modified for a controlled, deep-stall flight program. This modification allowed the horizontal stabilizer to pivot as much as 70 deg leading edge down. Ground vibration and flutter testing were accomplished on the sailplane with the horizontal stabilizer in the normal flight and deep-stall flight positions. Test results indicated satisfactory damping levels and trends for the structural modes of the sailplane. The modified sailplane was demonstrated to be free of aeroelastic instabilities to 83 KEAS with the horizontal stabilizer in the normal flight position and to 39 KEAS with the horizontal stabilizer in the deep-stall flight position. This flight envelope was adequate for the controlled, deep-stall flight experiments.
Authors
- Kehoe, M. W. NASA Ames Research Center
- Ellison, J. F. NASA Ames Research Center
Citation: Kehoe, M. W., Ellison, J. F. (2019). Flutter clearance of the Schweizer 1-36 deep-stall sailplane. Legacy CDMS. NASA NTRS ID 19850024805. https://ntrs.nasa.gov/citations/19850024805 ↗