14 CFR §27.71
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For single-engine helicopters and multiengine helicopters that do not meet the Category A engine isolation requirements of Part 29 of this chapter, the minimum rate of descent airspeed and the best angle-of-glide airspeed must be determined in autorotation at—