14 November 1974: The very first operational McDonnell Douglas F-15A Eagle air superiority fighters were delivered to the 555th Tactical Training Squadron, 58th Tactical Training Fighter Wing, at Luke Air Force Base, west of Phoenix, Arizona. The acceptance ceremony was presided over by President Gerald R. Ford.
“. . . I am here today to underscore to you and to the world that this great aircraft was constructed by the American people in the pursuit of peace. Our only aim with all of this aircraft’s new maneuverability, speed, and power is the defense of freedom.
“I would rather walk a thousand miles for peace than to have to take a single step for war.
“I am here to congratulate you: the United States Air Force, McDonnell Douglas, Pratt and Whitney, all of the many contractors and workers who participated in this very, very successful effort, as well as the pilots who have so diligently flight-tested the F-15 Eagle. All of you can underline my feeling that we are still pilgrims on this Earth, and there still is a place for pioneers in America today.”
—Gerald R. Ford, Jr., 38th President of the United States of America
The F-15A Eagle is a Mach 2.5+ fighter with outstanding acceleration and maneuverability. The F-15A was produced by McDonnell Douglas at St. Louis, Missouri, from 1972 to 1979. It is a single-seat, twin-engine, air superiority fighter. It is 63 feet, 9.0 inches (19.431 meters) long with a wingspan of 42 feet, 9.7 inches (13.048 meters) and overall height of 18 feet, 5.4 inches (5.624 meters). The F-15A has an empty weight of 25,870 pounds (11,734 kilograms) and its maximum takeoff weight (MTOW) is 44,497 pounds (20,184 kilograms).
The F-15A is powered by two Pratt & Whitney JTF22A-25A (F100-PW-100) afterburning turbofan engines. The F100 is a two-spool, axial-flow turbine engine with a 3-stage fan section; 10-stage compressor; single chamber combustion section; and 4-stage turbine (2 low- and 2 high-pressure stages). The engine has a Maximum Continuous Power rating of 12,410 pounds of thrust (55.202 kilonewtons); 14,690 pounds (65.344 kilonewtons, 30-minute limit; and a maximum 23,840 pounds (106.046 kilonewtons), 5-minute limit. The F100-PW-100 is 191 inches (4.851 meters) long, 46.5 inches (1.181 meters) in diameter, and weighs 3,035 pounds (1,376.7 kilograms).
The cruise speed of the F-15A Eagle is 502 knots (578 miles per hour/930 kilometers per hour). It has a maximum speed of 893 knots (1,028 miles per hour/1,654 kilometers per hour) at 10,000 feet (3,048 meters), and 1,434 knots (1,650 miles per hour/2,656 kilometers per hour) at 45,000 feet (13,716 meters). The ceiling is 63,050 feet (19,218 meters) at maximum power. It can climb at an initial 67,250 feet per minute (342 meters per second) from Sea Level, and with a thrust-to-weight ratio of 1.15:1, The F-15 can climb straight up. The Eagle’s combat radius is 638 nautical miles (734 statute miles/1,182kilometers).
The F-15A is armed with one General Electric M61A1 Vulcan 20mm rotary cannon with 938 rounds of ammunition, four AIM-7F Sparrow radar-guided missiles and four AIM-9 Sidewinder heat-seeking missiles. The fighter can also be armed with a Mk.82 500-pound or Mk. 84 2,000-pound bombs.
384 F-15A Eagles were built before production shifted to the improved F-15C version. As F-15Cs became operational, the F-15As were transferred to Air National Guard units assigned to defend U.S. continental airspace. The last F-15A was retired from service in 2009.
The President of the United States in the name of The Congress takes pleasure in presenting the Medal of Honor
FRANK LUKE, JR.
Rank and Organization: Second Lieutenant, 27th Aero Squadron, 1st Pursuit Group, Air Service.
Place and Date: Near Murvaux, France, 29 September 1918.
Entered Service At: Phoenix, Ariz. Born: 19 May 1897, Phoenix, Ariz.
G. O. No.: 59, W.D., 1919.
“For conspicuous gallantry and intrepidity above and beyond the call of duty in action with the enemy near Murvaux, France, September 29, 1918. After having previously destroyed a number of enemy aircraft within 17 days he voluntarily started on a patrol after German observation balloons. Though pursued by eight German planes which were protecting the enemy balloon line, he unhesitatingly attacked and shot down in flames three German balloons, being himself under heavy fire from ground batteries and the hostile planes. Severely wounded, he descended to within 50 meters of the ground, and flying at this low altitude near the town of Murvaux opened fire upon enemy troops, killing six and wounding as many more. Forced to make a landing and surrounded on all sides by the enemy, who called upon him to surrender, he drew his automatic pistol and defended himself gallantly until he fell dead from a wound in the chest.”
Second Lieutenant Frank Luke, Jr. shot down three enemy observation balloons along the Meuse front, on Sunday, 29 September 1918. He was apparently wounded by rifle or machine gun fire from the ground and made an emergency landing near the village of Murvaux.
Trying to evade capture, Luke walked away from his airplane toward a nearby creek. He exchanged gunfire with several German soldiers that were near, and was killed in the brief fire fight. The event was witnessed by at least thirteen of the local French villagers.
Luke’s body was buried near a village church, and was not located by graves registration personnel until several months later.
Luke’s commander, Major Harold E. Hartney, said of him, “No one had the sheer contemptuous courage that boy possessed. He was an excellent pilot and probably the best flying marksman on the Western Front. We had any number of expert pilots and there was no shortage of good shots, but the perfect combination, like the perfect specimen of anything in the world, was scarce. Frank Luke was the perfect combination.”
Leading American ace Captain Edward V. Rickenbacker said of Luke: “He was the most daring aviator and greatest fighter pilot of the entire war. His life is one of the brightest glories of our Air Service. He went on a rampage and shot down fourteen enemy aircraft, including ten balloons, in eight days. No other ace, even the dreaded Richthofen, had ever come close to that.”
Luke is officially credited with destroying 14 observation balloons and 4 enemy airplanes during a 17 day period, 12–29 September 1918. It is probable that he shot down several more.
The airplane flown by Lieutenant Luke on the day he was killed was a new Société des Avions Bernard-built SPAD S.XIII C.I, serial number 7984. It had been assigned to the 27th Aero Squadron the previous day and had not yet been painted with any squadron markings.
The Société Pour L’Aviation et ses Dérivés SPAD S.XIII C.I was a single-seat, single-engine two-bay biplane designed by Louis Béchéreau. It was first flown by Sous-Lieutenant René Pierre Marie Dorme of the Aéronautique Militaire (French Air Service), on 4 April 1917.
The S.XIII was 20 feet, 4 inches (6.198 meters) long.¹ The upper and lower wings had equal span and chord. The span was 26 feet, 3¾ inches (8.020 meters) and chord, 4 feet, 7-1/8 inches (1.400 meters). The vertical spacing between the wings was 3 feet, 10½ inches (1.181 meters), and the lower wing was staggered 1¼° behind the upper. Interplane struts and wire bracing was used to reinforce the wings. The wings had no sweep or dihedral. The angle of incidence of the upper wing was 1½° and of the lower, 1°. Only the upper wing was equipped with ailerons. Their span was 7 feet, 3½ inches (2.222 meters), and their chord, 1 foot, 7½ inches (0.495 meters). The total wing area was 227 square feet (21.089 square meters).
The horizontal stabilizer had a span of 10 feet, 2 inches (3.099 meters) with a maximum chord of 1 foot, 8¾ inches (0.527 meters). The height of the vertical fin was 2 feet, 7/8-inch (0.876 meters) and it had a maximum length of 3 feet, 11¼ inches (1.200 meters). The rudder was 3 feet, 10-5/8 inches high (1.184 meters) with a maximum chord of 2 feet, 2 inches (0.660 meters).
The SPAD S.XIII C.I had fixed landing gear with two pneumatic tires. Rubber cords (bungie cords) were used for shock absorption. The wheel track was 4 feet, 10¾ inches (1.492 meters). At the tail was a fixed skid.
The airplane had an empty weight of 1,464 pounds (664 kilograms), and gross weight 2,036 pounds (924 kilograms).
Initial production SPAD XIIIs were powered by a water-cooled 11.762 liter (717.769-cubic-inch displacement), La Société Hispano-Suiza 8Ba single overhead cam (SOHC) left-hand-tractor 90° V-8 engine. It was equipped with two Zenith down-draft carburetors and had a compression ratio of 5.3:1. The 8Ba was rated at 150 cheval vapeur (148 horsepower) at 1,700 r.p.m., and 200 cheval vapeur (197 horsepower) at 2,300 r.p.m. It drove a two-bladed, fixed-pitch, wooden propeller with a diameter of 2.50 meters (8 feet, 2.43 inches) through a 0.585:1 gear reduction. (The 8Be engine had a 0.75:1 reduction gear ratio and used both 2.50 meter and 2.55 meter (8 feet, 4.40 inches) propellers.) The Hispano-Suiza 8Ba was 1.36 meters (4 feet, 5.5 inches) long, 0.86 meters (2 feet, 9.9 inches) wide and 0.90 meters (2 feet, 11.4 inches) high. It weighed 236 kilograms (520 pounds).
The airplane had a main fuel tank behind the engine, with a gravity tank located in the upper wing. The total fuel capacity was 183 pounds (83 kilograms), sufficient for 2 hours, 30 minutes endurance at full throttle at 10,000 feet (3,048 meters), including climb. There was also a 4.5 gallon (17 liters) lubricating oil tank.
During flight testing at McCook Field, Ohio, following the war, a SPAD S.XIII C.I demonstrated a maximum Sea Level speed of 131.5 mph (211.6 kilometers per hour) at 2,300 rpm, and 105 mph (169 kilometers per hour) at 2,060 r.p.m., at 18,400 feet (5,608 meters). Its service ceiling was 18,400 feet (5,608 meters), and the absolute ceiling was 20,000 feet (6,096 meters).
The chasseur was armed with two fixed, water-cooled, .303-caliber (7.7 mm) Vickers Mk.I machine guns with 400 rounds of ammunition per gun, synchronized to fire forward through the propeller arc. Because of the cold temperatures at altitude, the guns’ water jackets were not filled, thereby saving considerable weight.
The SPAD S.XIII C.I was produced by nine manufacturers. 8,472 were built in 1917 and 1918. Only four are still in existence.
Recommended:The Stand: The Final Flight of Lt. Frank Luke, Jr., by Stephen Skinner, Schiffer Publishing Ltd., Atglen, Pennsylvania, 2008.
¹ Dimensions, weights, capacities and performance data cited above refer to SPAD S.XIII C.I serial number 17956 (A.S. 94101), which was tested at McCook Field, Dayton, Ohio (Project Number P-154), 1921.