E. N. Bachelder, Ph.D. and B. L. Aponso, "An Autorotation Flight Director for Helicopter Training," presented at American Helicopter Society 59th Annual Forum, Phoenix, AZ, May 6-8, 2003. (STI-P-609)

B. L. Aponso, E. N. Bachelder, Ph.D., and D. Lee, Ph.D., "Automated Autorotation for Unmanned Rotorcraft Recovery," presented at AHS International Specialists' Meeting on Unmanned Rotorcraft, Chandler, AZ, January 18-20, 2005. (STI-P-646)

A. K. Lampton, Ph.D., D. H. Klyde, D. J. Alvarez, P. C. Schulze, P. M. Thompson, Ph.D., and C.-Y. Liang, Ph.D., "Evaluation of a Precision Hover Task with Added Rotorcraft Dynamics Using Time-Varying Cutoff Frequency," presented at 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 3-5, 2011. (STI-P-762)

B. L. Aponso, D. Lee, Ph.D., and E. N. Bachelder, Ph.D., "Evaluation of a Rotorcraft Autorotation Training Display on a Commercial Flight Training Device," Journal of the American Helicopter Society, vol. 53,no. 2, pp. 123-133, 2007. (STI-P-655)

E. N. Bachelder, Ph.D., D. Lee, Ph.D., B. L. Aponso, M. J. Pollack, and P. J. Germanowski, "Improved Method for Evaluating OEI Height-Velocity Boundaries," presented at The Fourth Vertical Lift Aircraft Design (VLAD) Conference, San Francisco CA, Jan 18-20, 2006. (STI-P-666)

D. H. Klyde, P. C. Schulze, P. M. Thompson, Ph.D., and C.-Y. Liang, Ph.D., "Use of Wavelet Scalograms to Characterize Rotorcraft Pilot-Vehicle System Interactions," presented at American Helicopter Society 66th Annual Forum, Phoenix, AZ, May 11, 2010. (STI-P-742)