Just flew a Litchi mission I have been pondering for the last couple of weeks.... 47185 ft, cruising speed set at 31 mph. Litchi predicted 23 min flight time, take off to landing actual time was 19 mins. I took off with a full battery, landed at 11%. My P4 was out of radio range for a long, long time, I was really getting nervous until I reconnected! It was a rush to hear and finally see the little guy on his way home!