Hi everyone just registered and first thread, attained my ppl a couple of months ago on the Pa-38 and could anyone help me with the following scenario - TAS on take off ie 65 knots with a 20 knots headwind giving a groundspeed of 45 knots at rotation, at what point on the take off run did the Pitot start to register the headwind, as when we taxi at say 5 or 10 knots the airspeed is reading what is probably the ground speed, then when we line up and hold, zero reads on the airspeed indicator, but at some point during our ground run it senses the additional airflow of the 20 knot headwind to give us our airspeed, or to put it metaphorically if we could start to taxi along the runway at 10 knots indicated and a 20 knot headwind and someone tracked us using a radar gun the reading should be near to 10 knots, then we accelerate to 65 knots indicated with the same 20 knot headwind the radar gun would show a difference of approx 20 knots slower, somewhere during the acceleration the headwind became a factor but can anyone who has more of a life then me tell me when. Thanks in advance Driver 6452
