Draw a long horizontal oval or capsule shape for the fuselage
Add a pointed nose at the front
Sketch a tail section tapering toward the back
Draw a main wing on each side of the fuselage
Add a smaller horizontal stabilizer near the tail
Draw a vertical tail fin above the stabilizer
Add engine shapes under the wings or on the sides, depending on aircraft type
Sketch cockpit windows near the front
Add passenger windows or panel lines along the fuselage if desired
Draw landing gear beneath the body if the aircraft is on the ground
Refine the wing shapes with smooth leading and trailing edges
Erase extra guide lines
Outline the final drawing clearly
Add shading or color to finish the aircraft