@misc{indiciae7b0703a087ac,
  title = {Helicopter Rotor Blade With Free Tip},
  author = {Stroub, Robert H. and Young, Larry and Cawthorne, Matthew and Keys, Charles},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920000482},
  note = {Source identifier: 19920000482}
}