When do we announce V1 & rotate. Some people say , announce it 5-7 kts before reaching that vspeed .
Before 35 feet AGL at the end of the runway.
So you know, it is assumed there is a 7 second delay, so when the ac says rotate, it assumes it takes 2 seconds for the pilot to comprehend, 2 seconds to move the controls, and 3 seconds for the ac to respond....