737 - Flaps 1 or 5
I've noticed on the 737 that takeoff's are sometimes performed with flaps 1 and flaps 5. What are the factors that determine this?I imagine they are gross weight and runway length?
When you make the decision as to what flap setting to use, do you base it on specific guidelines, or is it based on experience?
Not a pilot so sorry if this seems like a stupid question.