Planes use flaps to land and to take off. So why do they retract them while they are on the ground, ie why not just leave them deployed? 1.77K viewsJanuary 3, 2024 Question90.92K June 3, 2019 0 Comments Planes use flaps to land and to take off. So why do they retract them while they are on the ground, ie why not just leave them deployed? In: Engineering 8 Answers ActiveNewestOldest Anonymous Posted June 3, 2019 0 Comments While damage risk is also a reason, the biggest is actually because they cause increased drag. Basically they help with landing and taking off, but they also slow the plane down. Jet fuel is expensive so efficiency is important. You are viewing 1 out of 8 answers, click here to view all answers. Register or Login
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