HELICOPTER GROUND RESONANCE : Understanding this dangerous phenomenon.

To be a good helicopter pilot and to avoid accidents, you need to know the hazardous flight conditions well. This is the second video in the series of "Hazardous Helicopter Flight Conditions". We study the Helicopter Ground Resonance. Other videos in this series cover : Vortex Ring State Mast Bumping LTE, (Loss of Tail Rotor Effectiveness) Unanticipated Yaw Dynamic and Static Rollover Carburetor Icing Rotor Stall Our Community Manager : https://www.sevencomweb.fr Our editor : https://www.instagram.com/gum_production Support us https://paypal.me/FLYHIGHYTB?country.x=FR&locale.x=en_US Join us https://www.facebook.com/flyhighytb https://www.instagram.com/fly_high_ytb Contact us [email protected] Links to demonstrations in full (Thank you to the providers) : Video ground resonance : https://youtu.be/0FeXjhUEXlc Wobbly spinning top : https://youtu.be/9-ysZtLqTNM Swing exercise : https://youtu.be/5JbpcsH80us Washing machine : https://youtu.be/cYoOwYTp7J8 Deathlock : https://youtu.be/6vICf8l-KV0 Other videos in this series cover : Vortex Ring State LTE (Loss of Tail Rotor Effectiveness) Mast Bumping Dynamic and Static Rollover Carburetor Icing Rotor Stall 0:00 intro 0:38 Ground Resonance 1:58 Causes 3:29 Dangers 3:46 Triggers 6:04 Avoiding GR 6:47 Action Required 7:18 Real Case Example 7:52 Conclusion