Aircraft

FIG. 1 is a front, right, top perspective view of an aircraft showing the new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a right side elevational view thereof; FIG. 5 is a left side elevational view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; and, FIG. 8 is a front, left, top perspective view thereof. The dashed broken lines in the figures show portions of the aircraft that form no part of the claimed design. The dot-dashed broken lines represent boundaries of the claimed design and form no part of the claimed design.