Was this a trick question? I assumed that you would take off into the wind. Taking off with the wind on your tail ,would be looking for a rekitted model! I overlooked the 'with the wind' part. Also the temp and humidity does have a profound effect on things. I remember one flight lesson I had in a 152 Cesna. It was a hot muggy day ,and we had a problem getting it to climb. If I remember right we could not even to get it to climb 100' per min. In cold dry air 0 degree or so it will climb three times that or more. Models respond the same way to. Of course if you have a little RC rocket you might not notice. By the way ,the flight characteristics efect the prop to.