• Pooja M
• Alisha D’costa
• Sahana N
• Seema khanum Z

Abstract: The project aims to reduce the trim angle of the elevator during the cruise phase of flight. The elevator trim angle produces negative lift at the tail end and this negative lift produced is the major cause for drag induced on the overall aircraft during its cruise flight, in turn limiting the cruise speed, increased fuel consumption to produce the thrust required to overcome this drag and there by reduced fuel efficiency. The center of gravity location of the aircraft is the primary factor which governs the trim angle produced during the flight. By moving the center of gravity towards the aerodynamic center of the aircraft, the trim angle and the negative lift produced therefore can be reduced. The project’s aim is to establish a theory for this, formulate a procedure and provide mathematical proof for the same. The project starts with the design of the aircraft from the scratch from the basic specifications of the aircraft. Since the focus is to design an elevator producing a reduced angle for trimming, the main focus is given on the longitudinal aspects of the design. The design calculation part is addressed in the project. The entire theoretical parameters required in designing a custom aircraft are calculated. Mat Lab programs are written to plot the graphs showing the reduction of elevator deflection and negative tail lift. This will provide a clear picture as to how much deflection has been reduced from the conventional design.

Fuel consumption reduction by variation in CG, 100 seater aircraft, cruising phase.

"Reduction of fuel consumption of a 100 seater aircraft by variation of CG during cruising phase ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.27-33, May-2019, Available :http://www.jetir.org/papers/JETIR1905507.pdf

"Reduction of fuel consumption of a 100 seater aircraft by variation of CG during cruising phase ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp27-33, May-2019, Available at : http://www.jetir.org/papers/JETIR1905507.pdf