Every helicopter will have a height velocity diagram in the Pilot's Operating Handbook. Become familiar with the one in the helicopter you are training in and know the safe altitude for an out of ground effect hover operation. The examiner will cover this during your helicopter check ride. You may not be able to conduct a successful auto rotation, should the engine quit in the shaded area of the height velocity diagram. Please like the video and subscribe to my channel if you are interested in more free helicopter ground school lessons. Click the bell to be notified as new videos are added. like us on FB at https://www.facebook.com/ClevelandHelicopterServices/ and be sure and look at our awesome services at www.clevelandhelicopterservices.com