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Question
Dear Ned

en.wikipedia.org/wiki/Landing_gear

Are the Landing gears always retractable in all airplanes ?.

i.e.

Once the airplanes takes off, the front and rear wheels are always
folded ?.
Once the airplanes wants to Land, the front and rear wheels are unfolded ?.

What are the Pros and Cons with and without having these retractable mechanism for Landing gears in airplanes ?.

Thanks & Regards,
Prashant S Akerkar

Answer
When the landing gear is not retracted it provides resistance to the air as the plane moves forward after takeoff. This reduces speed and increases the amount of fuel required to make a trip.

On planes without retractable gear the complexity of the aircraft is reduced making it cheaper to build and maintain.

Aviation/Flying

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Ned Dolan

Expertise

38 years as a professional pilot. Worked as an instructor for a major airline, as a tow pilot towing gliders and flew international routes until 1998. Do not know much about the maintenance end of the business.

Experience

Teaching new Captains the skills and knowledge needed to occupy the position. Helping develop procedures for use in a new airplane type. (B757)

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