I am a student carrying out a project focussed on efficiency on aircraft. I have arrived at an idea I believe to be feasible. I am looking for suggestions, specification of what I would need, and any general tips and advice if this idea is actually reasonable.

I have found, using another page on this forum, the amount of fuel used by the engines on electrical generation. I am proposing to relieve this duty from the engines while in flight by opening large air intakes embedded into the rear of the fuselage on both left and right sides of the aircraft. These would guide air in and split into two convergent ducts that will spin a turbine that spins a generator. This power will be AC. It will be directly linked to the busbar system as a power source and feed into the battery after being converted to DC.

From an electrical and aerodynamic standpoint, is this feasible? Be as critical as possible. It is not a perfect idea, but the point is to save fuel by not generating power from the engines while in flight. This is aimed towards commercial airliners.

Hope you experts can help!

Thankyou