The Eagle first flew in July 1972, and entered service in 1976. It is among the most successful modern fighters, with over 100 victories and no losses in aerial combat, with the majority of the kills by the Israeli Air Force. The aircraft design proved flexible enough that an all-weather strike derivative, the F-15E Strike Eagle, an improved and enhanced version which was later developed, entered service in 1989 and has been exported to several nations. The F-15 has an all-metal semi-monocoque fuselage with a large-cantilever, shoulder-mounted wing. The wing planform of the F-15 suggests a modified cropped delta shape with a leading-edge sweepback angle of 45°. Ailerons and a simple high-lift flap are located on the trailing edge. No leading-edge maneuvering flaps are used. This complication was avoided by the combination of low wing loading and fixed leading-edge camber that varies with spanwise position along the wing. Airfoil thickness ratios vary from 6% at the root to 3% at the tip. The empennage is metal and composite construction, with twin aluminium/composite material honeycomb structure vertical stabilizers with boron-composite skin, resulting in an exceptionally thin tailplane and rudders. Composite horizontal all-moving tails outboard of the vertical stabilizers move independently to provide roll control in some flight maneuvers. The F-15 has a spine-mounted air brake and retractable tricycle landing gear. It is powered by two Pratt & Whitney F100 axial compressor turbofan engines with afterburners, mounted side-by-side in the fuselage and fed by rectangular inlets with variable intake ramps. The cockpit is mounted high in the forward fuselage with a one-piece windscreen and large canopy for increased visibility and a 360° field of view for the pilot. The airframe began to incorporate advanced superplastically formed titanium components in the 1980s. For more information on the development, design,operational history and variants, click here. Specifications below are for the F-15C model.