Tag Archives: Browning Machine Gun Caliber .50 AN-M2

3 February 1943

Test pilot Robert C. Chilton stand on the wing of a North American Aviation P-51B Mustang. (North American Aviation)
Test pilot Robert C. Chilton stands on the wing of a North American Aviation P-51B-10-NA Mustang, 42-106435. (North American Aviation, Inc.)

3 February 1943: North American Aviation test pilot Robert C. Chilton made the first flight of the first production P-51A Mustang, P-51A-1-NA, serial number 43-6003. A Model NA-99, the Mustang had manufacturer’s serial number 99-22106. This airplane was one of 1,200 which had been ordered by the United States Army Air Corps on 23 June 1942. (With the introduction of the Merlin-powered P-51B, the number of P-51A Mustangs was reduced to 310.)

The first production P-51A, 43-6006, shown with skis for winter operations testing. (U.S. Air Force)
The first production P-51A, 43-6003, shown with skis for winter operations testing. (U.S. Air Force)

The Mustang had been designed and built by North American Aviation, Inc., as a fighter for the Royal Air Force. Two Mustang Mk.I airplanes, the fourth and the tenth from the RAF production line, had been given to the Air Corps for evaluation and designated XP-51, serial numbers 41-038 and 41-039. Prior to this, the Air Corps had ordered 150 P-51 fighters, but these were Mustang Mk.I models to be turned over to England under Lend-Lease.

43-6003 was used for testing and was equipped with skis for takeoff and landing tests in New Hampshire and Alaska.

The second production North American Aviation P-51A-NA Mustang, 43-6004, (99-22107) was used for high-speed testing. It was called Slick Chick. (U.S. Air Force)

The North American Aviation P-51A Mustang was a single-seat, single-engine, long-range fighter. It is a low-wing monoplane with retractable landing gear and is of all-metal construction. It was 32 feet, 2½ inches (9.817 meters) long with a wingspan of 37 feet, ¼-inch (11.284 meters) and a height of 12 feet, 2-½ inches (3.721 meters) high. It had an empty weight of 6,451 pounds (2,926 kilograms) and gross weight of 8,000 pounds (3,629 kilograms).

The third production North American Aviation P-51A Mustang, 43-6005. (North American)
The third production North American Aviation P-51A-1-NA Mustang, 43-6005 (99-22108). (North American Aviation, Inc.)

The P-51A was powered by a right-hand tractor, liquid-cooled, supercharged, 1,710.60-cubic-inch-displacement (28.032 liter) Allison Engineering Company V-1710-F20R (V-1710-81) single overhead cam (SOHC) 60° V-12 engine with a compression ratio of 6.65:1. The V-1710-81 had a Maximum Continuous Power rating of 870 horsepower at 2,600 r.p.m., at Sea Level, and 1,000 horsepower at 2,600 r.p.m. at 14,400 feet (4,389 meters). It was rated at 1,200 horsepower at 3,000 r.p.m. for takeoff. The Military Power rating was 1,125 horsepower at 3,000 r.p.m., to an altitude of 14,600 feet (4,450 meters). War Emergency Power was 1,480 horsepower. The engine drove a 10 foot, 9 inch (3.277 meter) diameter, three-bladed Curtiss Electric constant-speed propeller through a 2:1 gear reduction. The engine was 7 feet, 1.87 inches (2.181 meters) long, 3 feet, 0.75 inches (0.933 meters) high and 2 feet, 5.28 inches (0.744 meters) wide. It weighed 1,352 pounds (613 kilograms).

Allison-engined P-51A-1-NA Mustang 43-6008. (99-22111). (NASA Langley Research Center Vintage Photographs Collection)

Maximum speed of the P-51A in level flight was 415 miles per hour (668 kilometers per hour) at 10,400 feet (3,170 meters) at War Emergency Power. It could climb to 20,000 feet (6,096 meters) in 7 minutes, 3.6 seconds, and to 30,000 feet (9,144 meters) in 15 minutes, 4.8 seconds. Its service ceiling was 35,100 feet (10,699 meters) and the absolute ceiling was 36,000 feet (10,973 meters). Maximum range on internal fuel was 750 miles (1,207 kilometers).

The P-51A was armed with four Browning AN-M2 .50-caliber machine guns, with two mounted in each wing. The inner guns had 350 rounds of ammunition, each, and the outer guns had 280 rounds per gun.

Of the 1,200 P-51A Mustangs ordered by the Army Air Corps, 310 were delivered. The order was changed to the Packard V-1650 Merlin-powered P-51B Mustang.

The fourth production airplane, North American Aviation P-51A-1-NA Mustang 43-6006. This Mustang crashed in Alsaka in 1944 an dwas recovered in 1977, then restored. It has FAA registration N51Z. (Kogo via Wikipedia)
The fourth production airplane, North American Aviation P-51A-1-NA Mustang 43-6006. This Mustang crashed in Alaska in 1944 and was recovered in 1977, then restored. It has FAA registration N51Z. (Kogo)

Robert Creed Chilton was born 6 February 1912 at Eugene, Oregon, the third of five children of Leo Wesley Chilton, a physician, and Edith Gertrude Gray. He attended Boise High School in Idaho, graduating in 1931. Chilton participated in football, track and basketball, and also competed in the state music contest. After high school, Chilton attended the University of Oregon where he was a member of the Sigma Chi fraternity (ΣΧ). He was also a member of the Reserve Officers Training Corps (ROTC).

Bob Chilton enlisted as an Aviation Cadet in the U.S. Army Air Corps, 25 June 1937. He was trained as a fighter pilot at Randolph Field and Kelly Field in Texas, and was commissioned as a Second Lieutenant in 1938. Lieutenant Chilton was assigned to fly the Curtiss P-36 Hawk with the 79th Pursuit Squadron, 20th Pursuit Group, at Barksdale Field, Louisiana. Because of a medical condition, he was released from active duty, 1 April 1939.

At some time prior to 1940, Bob Chilton, married his first wife, Catherine. They lived in Santa Maria, California, where he worked as a pilot at the local airport.

In January 1941, Chilton went to work as a production test pilot for North American Aviation, Inc., Inglewood, California. After just a few months, he was assigned to the NA-73X.

Chilton married his second wife, Betty W. Shoemaker, 15 November 1951.

On 10 April 1952, Bob Chilton returned to active duty with the U.S. Air Force, with the rank of lieutenant colonel. He served as Chief of the Republic F-84 and F-105 Weapons System Project Office, Air Material Command, at Wright-Patterson Air Force Base, Dayton, Ohio, until 9 March 1957.

From 1958, Chilton was a vice president for Horkey-Moore Associates, an engineering research and development company in Torrance, California, founded by former North American aerodynamacist Edward J. Horkey. In 1961, he followed Horkey to the Space Equipment Corporation, parent company of Thompson Industries and Kerr Products, also located in Torrance. Chilton served as corporate secretary and contracts administrator.

Chilton married his third wife, Wilhelmina E. Redding (Billie E. Johnson) at Los Angeles, 26 July 1964. They divorced in 1972.

In 1965, Bob Chilton returned to North American Aviation as a flight test program manager. He retired in 1977.

Robert Creed Chilton died at Eugene, Oregon, 31 December 1994, at the age of 82 years.

© 2019, Bryan R. Swopes

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20 December 1943

Technical Sergeant Forrest Lee Vosler, Air Corps, United States Army. (U.S. Air Force)

MEDAL OF HONOR

VOSLER, FORREST L.

(Air Mission)

          The President of the United States takes pleasure in awarding the MEDAL of HONOR to

STAFF SERGEANT FORREST L. VOSLER,

AIR CORPS, UNITED STATES ARMY,

for service as set forth in the following

CITATION:

         “For conspicuous gallantry in action against the enemy above and beyond the call of duty while serving as a radio operator-air gunner on a heavy bombardment aircraft in a mission over Bremen, Germany, on 20 December 1943. After bombing the target, the aircraft in which T/Sgt. Vosler was serving was severely damaged by antiaircraft fire, forced out of formation, and immediately subjected to repeated vicious attacks by enemy fighters. Early in the engagement a 20-mm. cannon shell exploded in the radio compartment, painfully wounding T/Sgt. Vosler in the legs and thighs. At about the same time a direct hit on the tail of the ship seriously wounded the tail gunner and rendered the tail guns inoperative. Realizing the great need for firepower in protecting the vulnerable tail of the ship, T/Sgt. Vosler, with grim determination, kept up a steady stream of deadly fire. Shortly thereafter another 20-mm. enemy shell exploded, wounding T/Sgt. Vosler in the chest and about the face. Pieces of metal lodged in both eyes, impairing his vision to such an extent that he could only distinguish blurred shapes. Displaying remarkable tenacity and courage, he kept firing his guns and declined to take first-aid treatment. The radio equipment had been rendered inoperative during the battle, and when the pilot announced that he would have to ditch, although unable to see and working entirely by touch, T/Sgt. Vosler finally got the set operating and sent out distress signals despite several lapses into unconsciousness. When the ship ditched, T/Sgt. Vosler managed to get out on the wing by himself and hold the wounded tail gunner from slipping off until the other crewmembers could help them into the dinghy. T/Sgt. Vosler’s actions on this occasion were an inspiration to all serving with him. The extraordinary courage, coolness, and skill he displayed in the face of great odds, when handicapped by injuries that would have incapacitated the average crew member, were outstanding.”

/s/ Franklin D. Roosevelt

Technical Sergeant Forrest L. Vosler, United States Army Air Corps, is awarded the Medal of Honor by President Franklin Delano Roosevelt in a ceremony in the Oval Office of the White House, Washington, D.C. (U.S. Air Force)
Technical Sergeant Forrest L. Vosler, Air Corps, United States Army, is awarded the Medal of Honor by President Franklin Delano Roosevelt in a ceremony in the Oval Office of the White House, Washington, D.C., 31 August 1944. Shaking Sergeant Vosler’s hand is Under Secretary of War Robert Porter Patterson, Sr. (U.S. Air Force)

Staff Sergeant Forrest Lee Vosler was the radio operator/top gunner aboard the Boeing B-17F-65-BO Flying Fortress 42-29664, Jersey Bounce, Jr.,¹ one of 21 B-17s of the 303rd Bombardment Group, Heavy, sent on Mission No. 90, an attack against Bremen, Germany. The bomber was under the command of 2nd Lieutenant John F. Henderson. Captain Merle R. Hungerford, an instructor pilot, acted as co-pilot. The bombers encountered heavy antiaircraft fire over the target, and were attacked by as many as 125 enemy fighters. Bombing from an altitude of  26,200 feet (7,986 meters), the B-17s dropped 24 tons of incendiary bombs.

Staff Sergeant Forrest Lee Volser was the radio operator on this Boeing B-17F-65-BO Flying Fortress, 42-29664, the “Jersey Bounce Jr.” (U.S. Air Force)

Jersey Bounce, Jr. was hit by anti-aircraft artillery just after its bomb load was released. The number 1 engine, outboard, left wing, and the number 4 engine, outboard, right wing, were damaged. When the B-17 slowed and dropped out of its formation, it became a target of opportunity for the Luftwaffe fighters.

The crew reported that as many as ten fighters attacked, one after another. Flight engineer and top turret gunner Staff Sergeant William H. Simpkins, Jr., was credited with destroying a Focke-Wulf Fw 190 fighter, and right waist gunner Sergeant Ralph F. Burkart shot down a Messerschmitt Me 210 twin-engine heavy fighter. Sergeant Stanley E. Moody, the left waist gunner, destroyed a Messerschmitt Bf 109 and probably shot down a Messerschmitt Bf 110 twin-engine fighter.

The heavily-damaged bomber flew at low altitude as it headed for the North Sea, and then toward England. Vosler sent repeated distress signals which allowed search and rescue aircraft to locate the B-17. Lieutenant Henderson ditched 42-29644 within sight of land. The crew were quickly rescued by a small coastal freighter, MV Empire Sportsman.² The bomber crew was then transferred to a British air-sea rescue boat.

Forrest Lee Vosler was born at Lyndonville, New York, 29 July 1923. He was the son of William I. Vosler, a farmer, and Lottie I. Furness Volser. He attended Livonia Central High School, Livonia, New York, graduating in 1941. He was employed as a drill press operator by General Motors at Rochester, New York.

Forrest Lee Vosler enlisted in the Air Corps, United States Army, at Rochester, 8 October 1942. He was 6 feet, 1 inch (1.854 meters) tall and weighed 147 pounds (66.7 kilograms). After completing basic training at Atlantic City, New Jersey, Private Vosler trained as a radio operator at Scott Field, Illinois, and as an aerial gunner at Harlingen, Texas. After completing training Private Vosler was promoted to Sergeant, 25 May 1943. In August 1943, he was promoted to Staff Sergeant. Deployed to the United Kingdom, Staff Sergeant Vosler was assigned to the 358th Bombardment Squadron, Heavy, of the 303rd Bombardment Group, Heavy, at RAF Molesworth (AAF-107), Cambridgeshire, England.

Technical Sergeant Vosler was the third of only four enlisted airmen two be awarded the Medal of Honor during World War II. Vosler was hospitalized for the next 12 months. After recuperating from his wounds, Vosler was discharged from the Army Air Corps, 17 October 1944. In addition to the Medal of Honor, Forrest Vosler had been awarded the Silver Star, the Purple Heart, Air Medal, Army Good Conduct Medal, American Campaign Medal, European-African-Middle Eastern Campaign Medal with one bronze service star, World War II Victory Medal and the Presidential Unit Citation.

Following the War, Forrest Volser was employed as an engineer at radio station WSYR, the oldest continuously operating radio station in the Syracuse, New York, area. He attended the College of Business Administration, Syracuse University, at Syracuse, New York. He was a member of the Sigma Chi (ΣΧ) fraternity.

Forrest Vosler married Miss Virginia Frances Slack, 28 October 1945, at the Grace Episcopal Church, Syracuse, New York. The ceremony was presided over by Rev. James R. Rockwell. They would have a daughter, Sondra Lee Vosler, and a son, Marcellus Vosler.

Vosler had lost one eye and found that blurred vision in his remaining eye made it impossible to keep up with his studies. He dropped out of college at the end of the 1945 fall semester.

“Woody” Vosler worked for the Veterans Administration for thirty years.

Forrest Lee Vosler died at Titusville, Florida, 17 February 1992 at the age of 68 years. He was buried at Arlington National Cemetery.

The Forrest L. Vosler Noncommissioned Officer Academy and the Forrest L. Vosler Veterans Memorial Park at Peterson Air Force Base, Colorado, are named in his honor.

A Boeing B-17F Flying Fortress (B-17F-95-BO 42-30243). (U.S. Air Force)

Boeing B-17F-65-BO Flying Fortress 42-29664, Jersey Bounce, Jr. The bomber was on its 32nd combat mission. It had been flown by at least nine different pilots and with different combat crews.

42-29664 was delivered from the Boeing plant in Seattle, Washington, to Denver, Colorado, 30 January 1943. It arrived at Salina, Kansas, 12 February 1943, and was sent on to Morrison, New Jersey, 28 February 1943. It was then flown across the north Atlantic Ocean to England. The new B-17F was assigned to the 358th Bombardment Squadron, 303rd Bombardment Group (Heavy), at RAF Molesworth, Cambridgeshire, England, 21 March 1943. It carried group identification markings VK C painted on its fuselage.

The Boeing B-17F Flying Fortress was a four-engine heavy bomber operated by a flight crew of ten. It was 74 feet, 9 inches (22.784 meters) long with a wingspan of 103 feet, 9.375 inches (31.633 meters) and an overall height of 19 feet, 1 inch (5.187 meters). Its empty weight was 34,000 pounds (15,422 kilograms), 40,437 pounds (18,342 kilograms) loaded, and the maximum takeoff weight was 56,500 pounds (25,628 kilograms).

Boeing B-17F Flying Fortress. (U.S. Air Force)

The B-17F was powered by four air-cooled, supercharged, 1,823.129-cubic-inch-displacement (29.875 liters) Wright Cyclone C9GC (R-1820-97) nine-cylinder radial engines with turbochargers, producing 1,200 horsepower at 2,500 r.p.m. for takeoff and 1,000 horsepower at 2,300 r.p.m. at Sea Level. War Emergency Power was 1,380 horsepower. The Cyclones turned three-bladed constant-speed Hamilton-Standard Hydromatic propellers with a diameter of 11 feet, 7 inches (3.835 meters) though a 0.5625:1 gear reduction.  The R-1820-97 engine is 47.80 inches (1.214 meters) long and 55.10 inches (1.399 meters) in diameter. It weighs 1,315 pounds (596 kilograms).

These engines gave the B-17F a cruising speed of 200 miles per hour (322 kilometers per hour). The maximum speed was 299 miles per hour (481 kilometers per hour) at 25,000 feet, though with War Emergency Power, the bomber could reach 325 miles per hour (523 kilometers per hour) at 25,000 feet for short periods. The service ceiling was 37,500 feet (11,430 meters).

With a normal fuel load of 2,520 gallons (9,540 liters) the B-17F had a maximum range of 2,880 miles (4,635 kilometers). Carrying a 6,000 pound (2,722 kilogram) bomb load, the range was 1,300 miles (2,092 kilometers).

358th Bombardment Squadron flight crew. Most of the men in this photograph were aboard "Jersey Bounce Jr.", 20 December 1943. Front, left to right: Sgt. Edward Ruppel. ball turret gunner; T/Sgt. Forest L. Vosler, radio operator; S/Sgt. William H. Simpkins, Jr., flight engineer/top turret gunner; Sgt. Gratz, tail gunner 9replaceing teh critically wounded Sgt. George W. Burke, who was rescued by Vosler); Sgt. Raaplh F. Burkhart, waist gunner. Rear, left to right: 2nd Lt. Warren S. Wiggins, navigator; 2nd Lt. Woodrow W. Monkres, bombardier; 2 Lt. Walter J. Ames, co-pilot; 2nd Lt. John F. Henderson, aircraft commander. (U.S. Air Force)
358th Bombardment Squadron flight crew. Most of the men in this photograph were aboard “Jersey Bounce Jr.”, 20 December 1943. Front, left to right: Sgt. Edward Ruppel, ball turret gunner; T/Sgt. Forest L. Vosler, radio operator/top gunner; S/Sgt. William H. Simpkins, Jr., flight engineer/top turret gunner; Sgt. Gratz, tail gunner (replacing the critically wounded Sgt. George W. Burke, who was rescued by Vosler); Sgt. Ralph F. Burkhart, waist gunner. Rear, left to right: 2nd Lt. Warren S. Wiggins, navigator; 2nd Lt. Woodrow W. Monkres, bombardier; 2 Lt. Walter J. Ames, co-pilot; 2nd Lt. John F. Henderson, aircraft commander. (U.S. Air Force)

The B-17F Flying Fortress was armed with up to 13 air-cooled Browning AN-M2 .50-caliber machine guns. Power turrets mounting two guns each were located at the dorsal and ventral positions.

The maximum bomb load was 20,800 pounds over very short ranges. Normally, 4,000–6,000 pounds (1,815–2,722 kilograms) were carried. The internal bomb bay could be loaded with a maximum of eight 1,600 pound (725.75 kilogram) bombs. Two external bomb racks mounted under the wings between the fuselage and the inboard engines could carry one 4,000 pound (1,814.4 kilogram) bomb, each, though this option was rarely used.

The B-17 Flying Fortress first flew in 1935, and was was in production from 1937 to 1945. 12,731 B-17s were built by Boeing, Douglas Aircraft Company and Lockheed-Vega. (The manufacturer codes -BO, -DL and -VE follows the Block Number in each airplane’s type designation.) 3,405 of the total were B-17Fs, with 2,000 built by Boeing, 605 by Douglas and 500 by Lockheed-Vega.

Only three B-17F Flying Fortresses remain in existence.

This restored Boeing B-17F-70-BO Flying Fortress, 42-29782, is on display at The Museum of Flight at Seattle's Boeing Field. (Boeing)
This restored Boeing B-17F-70-BO Flying Fortress, 42-29782, is on display at The Museum of Flight at Seattle’s Boeing Field. (Boeing)

¹ “Jersey Bounce” was a popular song of 1942.

² M/V Empire Sportsman was built by Richards Ironworks Ltd., Lowestoft, Suffolk, 1943. 325 Gross Registered Tons.

© 2017, Bryan R. Swopes

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20 December 1941

Kawasaki Ki-48 Army Type 99 twin-engine light bomber. Allied reporting name, “Lily.”

20 December 1941: For the first time, the 1st American Volunteer Group engaged aircraft of the Empire of Japan in combat. 1st and 2nd Squadrons, based at Kunming, China, intercepted ten Kawasaki Ki-48-I Army Type 99 twin-engine light bombers of the 82nd Dokuritsu Hiko Chutai.

Japan and China had been at war since 1937. The Japanese aircraft were based at the Gia Lâm airport, near Hà Nội in occupied French Indochina. They had frequently attacked Kunming, a Chinese city at the northern end of the Burma Road, and had previously been unopposed. For this mission, the bomber squadron initially had a fighter escort, but the fighters turned back at the Indo-China/China border.

The AVG had established a network of observers which would report enemy aircraft in time for the fighters to take off to intercept them. Having received the warning of inbound aircraft, the 1st and 2nd AVG squadrons were ordered into battle.

1st American Volunteer Group fighter pilots run toward their shark-mouthed Curtiss-Wright Hawk 81-A2s, “somewhere in China.” (Defense Media Network)

Sources vary widely as to the number of AVG aircraft involved, but there may have been as many as 16 Curtiss-Wright Hawk 81-A3s from the 1st Squadron, and 8 more from the 2nd Squadron. There is a general consensus that the fighters shot down three of the Japanese bombers, and that a fourth went down while returning to base. Other sources say that only one of the ten Ki-48s made it back to its base. AVG pilots claimed five bombers shot down and two damaged. One Hawk 81 ran out fuel and was damaged beyond repair in a forced landing.

A Curtiss-Wright Hawk 81-A3 of the 1st American Volunteer Group, Kunming, China, 1942. (U.S. Air Force)
CAMCO assembly facility for Curtiss-Wright Hawk 81-A3 fighters for AVG (74250 A.C.) (SDASM)
Curtiss-Wright 81-A3, 1st American Volunteer Group, circa 1942.
AMERICAN AIRCRAFT IN ROYAL AIR FORCE SERVICE: CURTISS HAWK 81A TOMAHAWK. (CH 17252) The first Curtiss Tomahawks, Marks I and IIA, to enter squadron service with the RAF, in the hands of No. 403 Squadron RCAF at Baginton, Warwickshire. The Squadron operated the Tomahawk for only a short time, yielding them in favour of Supermarine Spitfires in May 1941. Copyright: © IWM. Original Source: http://www.iwm.org.uk/collections/item/object/205210781
AMERICAN AIRCRAFT IN RAF SERVICE 1939-1945: CURTISS HAWK 81A TOMAHAWK. (ATP 10993F) Tomahawk Mk.IIb, AK184: cockpit interior, port side. Photograph taken at Air Service Training Ltd, Hamble, Hampshire. Copyright: © IWM. Original Source: http://www.iwm.org.uk/collections/item/object/205127117
Curtiss-Wright Tomahawk Mk.IIb, AK184, at Hamble, Hampshire © IWM.

RAF order for 100 Tomahawk IIb (Curtiss-Wright Hawk 81-A2 ) was released to be available for AVG. They were built as hybrids of the Tomahawk Mk.IIb and the P-40C Warhawk, though the airplanes intended for the AVG differed in details from either the standard Britsih or American fighters. The airplanes were painted in the standard RAF brown and green camouflage patterns. The completed airplanes were knocked down, crated, then shipped from New York. They were reassembled at a CAMCO facility near Rangoon, Burma.

Two Curtiss-Wright Tomahawk Mk.IIBs on a test flight following assembly at No. 107 Maintenance Unit, Kasfareet, Egypt. Copyright: © IWM.

The Curtiss-Wright Corporation Hawk 81 was a single-seat, single-engine pursuit (fighter). It was a low-wing monoplane of all-metal construction and used flush riveting to reduce aerodynamic drag. It had an enclosed cockpit and retractable landing gear. Extensive wind tunnel testing at the NACA Langley laboratories refined the airplane’s design, significantly increasing the top speed.

The Hawk 81 was 31 feet, 8¾ inches (9.671 meters) long, with a wingspan of 37 feet, 4 inches (11.379 meters) and overall height of 10 feet, 7 inches (3.226 meters).

The Tomahawk/Warhawk was powered by a liquid-cooled, supercharged, 1,710.597ubic-inch-displacement (28.032 liter) Allison Engineering Co. V-1710-C15 (V-1710-33), a single overhead cam (SOHC) 60° V-12 engine, which had a Continuous Power Rating of 930 horsepower at 2,600 r.p.m., from Sea Level to 12,800 feet (3,901 meters), and 1,150 horsepower at 3,000 r.p.m. to 14,300 feet (4,359 meters) for Take Off and Military Power. The engine drove a three-bladed Curtiss Electric constant-speed propeller through a 2:1 gear reduction. The V-1710-33 was 8 feet, 2.54 inches (2.503 meters) long, 3 feet, 5.88 inches (1.064 meters) high, and 2 feet, 5.29 inches (0.744 meters) wide. It weighed 1,340 pounds (607.8 kilograms).

Armament consisted of two air-cooled Browning AN-M2 .50-caliber machine guns mounted in the cowling and synchronized to fire forward through the propeller arc, with 380 rounds of ammunition per gun. In British service, the Tomahawk was armed with an additional four Browning .303 Mark II machine guns, with two in each wing. The American P-40, P-40B and P-40C Warhawks had two or four Browning AN-M2 .30-caliber aircraft machine guns as wing-mounted guns.

The “blood chit” was sometimes sewn on AVG pilots’ jackets.

The AVG pilots were employees of the Central Aircraft Manufacturing Company (CAMCO). Most were former United States military pilots who had been secretly recruited. They were required to resign their officers’ commissions. Importantly, they were all civilians—not members of the Chinese military–nor were they otherwise employed by the government of China. They each had a one year contract, 4 July 1941–4 July 1942. They were paid a monthly salary, more than three times their former military pay, and were also paid a bonus for each enemy airplane they shot down.

(Note: This article is an incomplete draft)

© 2018, Bryan R. Swopes

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18 December 1941

First Lieutenant Boyd D. Wagner, USAAC. (U.S. Air Force)
First Lieutenant Boyd David Wagner, United States Army Air Corps. (U.S. Air Force)

18 December 1941: First Lieutenant Boyd David (“Buzz”) Wagner, United States Army Air Corps, commanding officer of the 17th Pursuit Squadron (Interceptor) at Nichols Field, Pasay City, Commonwealth of the Philippines, shot down his fifth Japanese airplane, a Mitsubishi A6M2 Type Zero fighter, with his Curtiss-Wright P-40B Warhawk, near Vigan, Luzon. He became the first U.S. Army “ace” of World War II.

On 12 December 1941, “Buzz” Wagner was flying a lone reconnaissance mission over the airfield at Aparri, which had been captured by the invading Japanese. He was attacked by several Zero fighters but he evaded them, then returned and shot down two of them.  As he strafed the airfield he was attacked by more Zeros and shot down two more, bringing his score for the mission to four enemy airplanes shot down.

On 18 December, Lieutenant Wagner lead a flight of four P-40s to attack the enemy-held airfield at Vigan. He and Lieutenant Russell M. Church strafed and bombed the field while two other P-40s covered from overhead. Wagner destroyed nine Japanese aircraft on the ground, but as he passed over the field a Zero took off. Wagner rolled inverted to locate the Zero, then after spotting him, chopped his throttle and allowed the Zero to pass him. This left Wagner in a good position and he shot down his fifth enemy fighter. Lieutenant Church was shot down by ground fire and killed.

Mitsubishi A6M3 Model 22 "Zeke" in the Solomon Islands, 1943. (Imperial Japanese Navy)
A Mitsubishi A6M3 Navy Type 0 Model 22, UI 105, (Allied reporting name “Zeke”, but better known simply as “the Zero”) in the Solomon Islands, May 1943. This fighter is flown by Petty Officer 1st Class Hiroyoshi Nishizawa, 251st Kōkūtai, Imperial Japanese Navy Air Service. (Imperial Japanese Navy)

This fifth shoot down made Buzz Wagner the first U.S. Army Air Corps ace of World War II. He was awarded the Distinguished Service Cross, the Distinguished Flying Cross, and the Purple Heart for injuries sustained in an air battle, 22 December 1941. He was evacuated to Australia in January 1942.

2nd Lieutenant Boyd D. Wagner, Air Corps, United States Army.

Boyd David Wagner was born 26 October 1916 at Emeigh, Pennsylvania. He was the first of two children of Boyd Matthew Wagner, a laborer, and Elizabeth Moody Wagner. After graduating from high school, Wagner enrolled in the University of Pittsburgh, where he majored in aeronautical engineering.

After three years of college, Boyd Wagner enlisted as a flying cadet in the U.S. Army Air Corps, at Pittsburgh, Pennsylvania, 26 June 1937. He was commissioned as a Second Lieutenant, Air Corps Reserve, 16 June 1938. Lieutenant Wagner received advanced flight training and pursuit training, and on 1 October 1938 his commission as a reserve officer was changed to Second Lieutenant, Army Air Corps.

Wagner was promoted to First Lieutenant, Army of the United States, on 9 September 1940. Lieutenant Wagner was assigned to the 24th Pursuit Group in the Philippine Islands, 5 December 1940.

1st Lieutenant Boyd David Wagner, United States Army Air Corps, Philippine Islands, 1 December 1941. (Photograph by Carl Mydans/TIME & LIFE Pictures/Getty Images)
Lt. Col. Boyd D. Wagner

Lieutenant Wagner was promoted to the rank of Captain, A.U.S., 30 January 1942. On 11 April 1942, Captain Wagner was again promoted, bypassing the rank of Major, to Lieutenant Colonel, A.U.S. He was assigned to the 8th Fighter Group in New Guinea. On 30 April 1942, while flying a Bell P-39 Airacobra, Wagner shot down another three enemy airplanes. In September 1942, Colonel Wagner was sent back to the United States to train new fighter pilots.

On 29 November 1942, Colonel Wagner disappeared while on a routine flight from Eglin Field, Florida, to Maxwell Field, Alabama, in a Curtiss-Wright P-40K Warhawk, 42-10271. Six weeks later, the wreck of his fighter was found, approximately 4 miles north of Freeport, Florida. Lieutenant Colonel Boyd David Wagner, United States Army Air Corps, had been killed in the crash. His remains are buried at Grandview Cemetery, Johnstown, Pennsylvania.

Curtiss P-40B Warhawks at Clark Field, Philippine Islands, early December 1941.
Curtiss-Wright P-40B Warhawks of the 17th Pursuit Squadron, Nichols Field, Luzon, Philippine Islands, early December 1941. This squadron was under the command of 1st Lieutenant Buzz Wagner. (U.S. Air Force)

The Curtiss-Wright Corporation Hawk 81B (P-40B Warhawk) was a single-seat, single-engine pursuit. It was a low-wing monoplane of all-metal construction and used flush riveting to reduce aerodynamic drag. It had an enclosed cockpit and retractable landing gear. Extensive wind tunnel testing at the NACA Langley laboratories refined the airplane’s design, significantly increasing the top speed.

The P-40B Warhawk was 31 feet, 8¾ inches (9.671 meters) long, with a wingspan of 37 feet, 4 inches (11.379 meters) and overall height of 10 feet, 7 inches (3.226 meters). Its empty weight was 5,590 pounds (2,536 kilograms), and 7,326 pounds (3,323 kilograms) gross. The maximum takeoff weight was 7,600 pounds (3,447 kilograms).

Curtiss-Wright P-40B or C Warhawk, circa 1942. ¹ (Niagara Aerospace Museum)

The P-40B was powered by a liquid-cooled, supercharged, 1,710.597ubic-inch-displacement (28.032 liter) Allison Engineering Co. V-1710-C15 (V-1710-33), a single overhead cam (SOHC) 60° V-12 engine, which had a Continuous Power Rating of 930 horsepower at 2,600 r.p.m., from Sea Level to 12,800 feet (3,901 meters), and 1,150 horsepower at 3,000 r.p.m. to 14,300 feet  (4,359 meters) for Take Off and Military Power. The engine drove a three-bladed Curtiss Electric constant-speed propeller through a 2:1 gear reduction. The V-1710-33 was 8 feet, 2.54 inches (2.503 meters) long, 3 feet, 5.88 inches (1.064 meters) high, and 2 feet, 5.29 inches (0.744 meters) wide. It weighed 1,340 pounds (607.8 kilograms).

Allison Engineering Co. V-1710-33 V-12 aircraft engine at the Smithsonian Institution National Air and Space Museum Steven F. Udvar-Hazy Center. (NASM)
Allison Engineering Co. V-1710-33 V-12 aircraft engine at the Smithsonian Institution National Air and Space Museum Steven F. Udvar-Hazy Center. (NASM)

Heavier than the initial production P-40, the P-40B was slightly slower, with a maximum speed of 352 miles per hour (567 kilometers per hour) at 15,000 feet (4,572 meters). It had a service ceiling of 32,400 feet (9,876 meters). Its range was 730 miles (1,175 kilometers).

Armament consisted of two air-cooled Browning AN-M2 .50-caliber machine guns mounted in the cowling and synchronized to fire forward through the propeller arc, with 380 rounds of ammunition per gun, and four Browning AN-M2 .30-caliber aircraft machine guns, with two in each wing.

Curtiss-Wright produced 13,738 P-40s between 1939 and 1944. 131 of those were P-40B Warhawks.

These Curtiss P-40B Warhawks of the 44th Pursuit Squadron, 18th Pursuit Group, are the same type aircraft flown by Buzz Wagner. (U.S. Air Force)
These Curtiss P-40B Warhawks of the 44th Pursuit Squadron, 18th Pursuit Group, are the same type aircraft flown by Buzz Wagner in combat over the Philippine Islands. (U.S. Air Force)

¹ The Warhawk in the photograph may be P-40C 41-13471, s/n 16351.

© 2018, Bryan R. Swopes

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17 December 1944

Major Richard Ira Bong, Air Corps, United States Army, Leyte, 12 December 1944. Major Bong is wearing the Medal of Honor. (U.S. Air Force)

17 December 1944: Captain Richard Ira Bong, United States Army Air Corps, flying a Lockheed P-38 Lighting over San José on the Island of Mindoro, Commonwealth of the Philippines, shot down an enemy Nakajima Ki-43 Hayabusa (Allied reporting name, “Oscar”).

This was Bong’s 40th confirmed aerial victory and made him the leading American fighter ace of World War II. He is officially credited with 40 aircraft destroyed, 8 probably destroyed and 7 damaged.

Five days earlier, 12 December, during a ceremony at an American airfield on the Island of Leyte, Philippine Islands, General Douglas MacArthur, United States Army, had presented Major Bong the Medal of Honor.

An Associated Press reporter quoted the General:

“Of all military attributes, that one which arouses the greatest admiration is courage. It is the basis of all successful military ventures. our forces possess it to a high degree and various awards are provided to show the public’s appreciation. The Congress of the United States has reserved to itself the honor of decorating those amongst all who stand out as the bravest of the brave. It’s this high and noble category, Bong, that you now enter as I pin upon your tunic the Medal of Honor. Wear it as a symbol of the invincible courage you have displayed so often in mortal combat. My dear boy, may a merciful God continue to protect you is the constant prayer of your commander in chief.”

[On 18 December 1944, Douglas MacArthur was promoted to General of the Army, a five-star rank held by only nine other U.S. military officers. General MacArthur was the son of a Medal of Honor recipient, and had himself been twice nominated for the Medal for his actions during the occupation of Vera Cruz (1914) and the Meuse-Argonne Offensive (1918). He was awarded the Medal of Honor for his defense of the Philippines, 1941–42.]

General Douglas MacArthur talks with Major Richard I. Bong, 12 December 1944. (U.S. Air Force)
General Douglas MacArthur talks with Major Richard I. Bong, Leyte, Philippine Islands, 12 December 1944. (U.S. Air Force)

Richard Bong’s citation reads:

MEDAL OF HONOR

The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Major (Air Corps) Richard Ira Bong, United States Army Air Forces, for conspicuous gallantry and intrepidity in action above and beyond the call of duty while serving with the 49th Fighter Group, V Fighter Command, Fifth Air Force, in action in the Southwest Pacific area from 10 October to 15 November 1944.

Though assigned to duty as gunnery instructor and neither required nor expected to perform combat duty, Major Bong voluntarily and at his own urgent request engaged in repeated combat missions, including unusually hazardous sorties over Balikpapan, Borneo, and in the Leyte area of the Philippines. His aggressiveness and daring resulted in his shooting down eight enemy airplanes during this period.

General Orders: War Department, General Orders No. 90, December 8, 1944
Action Date: October 10 – November 15, 1944
Service: Army Air Forces
Rank: Major
Regiment: 49th Fighter Group, V Fighter Command
Division: 5th Air Force.

Dick Bong poses with "Marge," his Lockheed P-38J Lightning. A large photograph of his fiancee, Miss Marjorie Vattendahl, is glued to the fighter's nose.
Dick Bong poses with “Marge,” his Lockheed P-38J-15-LO Lightning, 42-103993, Lockheed serial number 2827. A large photograph of his fiancée, Miss Marjorie Ann Vattendahl, is affixed to the fighter’s nose.

Major Bong flew a number of different Lockheed P-38s in combat. He is most associated, though, with P-38J-15-LO 42-103993, which he named Marge after his fiancée, Miss Marjorie Ann Vattendahl, a school teacher from Poplar, Wisconsin.

Richard Bong had flown 146 combat missions. General George C. Kenney, commanding the Far East Air Forces, relieved him from combat and ordered that he return to the United States. He was assigned to test new production P-80 Shooting Stars jet fighters being built at Lockheed Aircraft Corporation’s Burbank, California plant.

On 6 August 1945, the fuel pump of the new P-80 Bong was flying failed just after takeoff. The engine failed from fuel starvation and the airplane crashed into a residential area of North Hollywood, California. Major Richard Ira Bong was killed.

Nakajima Ki-43 Type 1 Army Fighter (AvionsLegendaires.net)

The Nakajima Ki-43 Type 1 Hayabusa was a single-place, single-engine fighter manufactured by Nakajima Hikoki K.K. for the Imperial Japanese Army Air Service. The light weight fighter was very maneuverable and was a deadly opponent. It was identified as “Oscar” by Allied forces. The Ki-43 shot down more Allied airplanes during World War II than any other Japanese fighter.

The Ki-43 was 29.2 feet (8.90 meters) long, with a wingspan of 35.6 feet (10.85 meters) and height of 9 feet (2.74 meters). Its empty weight was 4,170 pounds (1,878 kilograms) and gross weight  was 5,500 pounds (2,495 kilograms).

The Ki-43 Type 1 Army Fighter was powered by an air-cooled, supercharged Nakajima Ha-115 Toku two-row, 14-cylinder radial engine which produced 925 horsepower at 9,350 feet (2,850 meters), 800 horsepower  at 20,000 feet (6,096 meters), and 1,105 horsepower at Sea Level for takeoff. The engine drove a three-bladed constant-speed propeller with a diameter of 9.2 feet (2.80 meters).

Nakajima Ki-43 Type 1 Army Fighter, called “Oscar” by the Allied forces. (The Java Gold’s Blog)

Compared to American fighters, the Oscar was lightly armed with just two synchronized 7.7 mm × 58 mm Type 89 or 12.7 mm × 81 mm Type 1 machine guns, or a combination of one 7.7 mm and one 12.7 mm gun. The 12.7 machine gun could fire explosive ammunition. (The Type 89 was a licensed version of the Vickers .303-caliber machine gun, while the design of the Type 1 was based on the Browning M1921 .50-caliber machine gun.)

The Oscar’s maximum speed was 295 miles per hour (475 kilometers per hour) at Sea Level, and 347 miles per hour (558 kilometers per hour) at 20,000 feet (6,096 meters). Its service ceiling was 37,100 feet (11,308 meters). The maximum range with a normal fuel load of 149 U.S. gallons (564 liters) was 1,180 miles (1,899 kilometers) at 1,500 feet (457 meters).

Lockheed P-38J-10-LO Lightning 42-68008, Lockheed serial number 2519. (Lockheed Martin)

The Lockheed P-38 lightning is a single-place, mid-wing, twin-engine fighter. It is an unusual configuration, with the cockpit, weapons and nose landing gear in a central nacelle, and engines, turbochargers, cooling system and main landing gear in outer “booms.” The airplane was originally designed by Clarence L. “Kelly” Johnson.

The P-38J is 37 feet, 10 inches (11.532 meters) long, with a wingspan of 52 feet, 0 inches (15.850 meters) and overall height of 9 feet, 9-11/16 inches (2.989 meters). The fighter has an empty weight of 12,700 pounds (5,761 kilograms) and maximum gross weight of 21,600 pounds (9,798 kilograms).

The P-38J was powered by two liquid-cooled, turbosupercharged 1,710.597-cubic-inch displacement (28.032 liter) Allison Engineering Company V-1710-F-17R and -F17L (V-1710-89 and -91, respectively) single overhead cam (SOHC) 60° V-12 engines with a continuous power rating of 1,100 horsepower at 2,600 r,p.m., to 30,000 feet (9,144 meters), and a takeoff/military power rating of 1,425 horsepower at 3,000 r.p.m. The counter-rotating engines drove 11 feet, 6 inches (3.505 meters) diameter, three-bladed Curtiss Electric full-feathering constant-speed propellers through a 2.00:1 gear reduction. The engines were 7 feet, 1.34 inches (2.168 meters) long, 3 feet, 0.75 inches (0.933 meters) high, 2 feet, 5.28 inches (0.744 meters) wide, and weighed 1,350 pounds (612 kilograms).

A flight of two camouflaged Lockheed P-38J Lightnings, circa 1943. Dick Bong is flying the closer airplane, P-38J-5-LO 42-67183. (Lockheed Martin)

The P-38J had a maximum speed of 420 miles per hour (676 kilometers per hour) at 26,500 feet (8,077 meters). The service ceiling was 44,000 feet (13,411 meters). Carrying external fuel tanks, the Lightning had a maximum range of 2,260 miles (3,637 kilometers).

P-38s were armed with one 20 mm Hispano M2 aircraft autocannon with 150 rounds of ammunition, and four air-cooled Browning AN-M2 .50-caliber machine guns with 500 rounds per gun. All guns are grouped close together in the nose and aimed straight ahead.

A Lockheed P-38 Lighning test fires its guns. (Lockheed Martin)

Between 1939 and 1945, Lockheed Aircraft Corporation built 10,037 P-38 Lightnings at Burbank, California. 2,970 of these were P-38Js.

Major Richard Ira Bong, Air Corps, United States Army. (Richard I. Bong Veterans Historical Center/National Endowment for the Humanities)

© 2018, Bryan R. Swopes

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