Helicopter Approach General Safe Rule (30 until less than 300)

13 Mar 2020 · 18 min
18:05

Kenny Keller teaches the 30-knot minimum airspeed rule for helicopter approaches: stay at 30 knots until your descent rate drops below 300 feet per minute to avoid vortex ring state. The lesson includes cockpit footage showing how the vertical speed indicator lags, plus a live Q&A with giveaway quizzes.

Questions this video answers

Always keep 30 knots on your airspeed until your rate of descent is below 300 ft per minute.

About 9 seconds (VSI shows roughly 9 seconds-old information).

ETL occurs somewhere between 16 to 24 knots.

1) Rate of descent 300 ft/min or greater; 2) Using 20–100% of available power; 3) Airspeed less than ETL.

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