at v1 the howgozit needle 39 s 6 usefulness as such ceases and it automatically returns to zero or the start position a start button 7 to be operated at the start of the takeoff roll starts the howgozit needle 6 operation the computer 2 loaded with its eight prompts for takeoff performance then governs the rate at which the howgozit needle 6 progresses based on time in a tape type airspeed indicator 11 the howgozit needle 12 may be incorporated as shown in sheet 4 of 4 of the drawings in this case the pilot is informed of the airspeed the aircraft should be at when acceleration is on schedule by means of a needle electronically generated out of the lubber line or reference line 10 of the howgozit airspeed indicator 11 which is herein referred to as the howgozit needle 12 as depicted in sheet 4 of 4 of the drawings as the aircraft accelerates during the takeoff roll the howgozit needle 12 will point to the airspeed at which the aircraft should be at at that particular moment if the aircraft is on acceleration schedule as planned then the howgozit needle 12 will not be generated and thus not seen if however the aircraft is ahead of acceleration schedule then the howgozit needle 12 will appear and point down out of the lubber line 10 to the speed the aircraft should be at when on planned acceleration schedule on the other hand if the aircraft is behind the acceleration schedule as depicted in sheet 4 of 4 of the drawings the howgozit needle 12 will be generated upward from the lubber line 10 to the speed the aircraft should be at when on planned acceleration schedule the further behind schedule.