19–20 November 1945: A Bell-Atlanta B-29B-60-BA Superfortress, 44-84061, named Pacusan Dreamboat, piloted by Colonel Clarence Shortridge Irvine and Lieutenant Colonel G.R. Stanley, flew non-stop and unrefueled from Guam, the largest and southernmost island in the Mariana Islands of the Western Pacific, to Washington, D.C. The four-engine heavy bomber covered the 8,198 miles (13,193 kilometers) in 35 hours, 5 minutes. It set a Fédération Aéronautique Internationale (FAI) record for Distance in a Straight Line: 12,739.59 kilometers (7,916.01 miles).¹
Pacusan Dreamboat was modified specifically for a series of long-distance flights. A standard production B-29B, a light-weight variant of the Boeing B-29 Superfortress, it did not have the four power gun turrets with their .50-caliber machine guns. A radar-directed 20 mm cannon and two .50-caliber machine guns in the tail were the only defensive weapons. Much of the standard armor plate was also deleted. It weighed 69,000 pounds (31,298 kilograms) empty and 137,000 pounds (62,142 kilograms) fully loaded. Pacusan Dreamboat was further lightened. The tail guns were removed and the tail reshaped. It had an empty weight of 66,000 pounds (29,937 kilograms). Its takeoff weight on this flight was 151,000 pounds (68,492 kilograms).
Pacusan Dreamboat carried a 12-man crew and 10,000 gallons (37,854 liters) of gasoline.
Pacusan Dreamboat set a number of distance and speed records, including Honolulu, Hawaii to Cairo, Egypt and Burbank to New York in 5 hours, 27 minutes, averaging 451.9 miles per hour (727.26 kilometers per hour).
The Pacusan Dreamboat was stricken from the Air Force inventory 8 August 1954 and reclaimed at Tinker Air Force Base, Oklahoma City, Oklahoma.
19 November 1952: Captain James Slade Nash, U.S. Air Force, a test pilot at the Air Force Flight Test Center, Edwards Air Force Base, California, flew a North American Aviation F-86D-20-NA Sabre, 51-2945, to a Fédération Aéronautique Internationale (FAI) World Absolute Speed Record at the Salton Sea, in the Colorado Desert of southeastern California.
Operating out of NAS El Centro, Captain Nash flew four passes over a 3-kilometer course at an altitude of 125 feet (38 meters). The official average speed was 1,124.14 kilometers per hour (698.508 miles per hour).¹ He was awarded the FAI’s Henry de la Vaulx Medal for achieving the World Absolute Speed Record.
The Desert Sun reported:
Sabre-Jet Sets new Wold Speed Mark at Salton Sea
Record of 699.9 Mile Per Hour Established in Four Flights over Below Sea Level Course
The desert area, few miles east of Palm Springs, was the setting for a new international airplane speed record last week when an F-86D Sabre jet roared over Salton Sea at 699.9 miles an hour. It was reported that in test runs previously the plane had exceeded 700 miles an hour.
Risking his life to set the new record was Capt. Slade Nash, a 31-year-old Sioux City, Iowa man with three children. His wife, but not his three daughters, watched as Captain Nash barreled the swept-wing North American interceptor jet four times over the course, as close as 100 feet to the ground although he could have flown it at 328 feet.
Nash had only to hit 676 miles an hour to shatter the previous world speed record set September 15, 1948, by Maj. Richard L. Johnson, air material command test pilot, at Edwards Air Force Base in an earlier Sabrejet—the F-86A. Johnson’s Mark was 670.981 m.p.h. and Nash was required to fly 5 m.p.h. faster to set a new record.
NASH’S SABRE jet carried a full rocket load. Adding hazard to the inherent danger of gunning a plane to near 700 m.p.h. was the low altitude below sea level—at when the run for record was made.
Fuel requirements are much higher at sea level than at high levels and air pressure on the plane is about four times greater. In addition, aerodynamic problems of drag, buffet, stability and structural strength are greatly increased at sea level. However, low altitude and higher temperatures make higher speeds possible.
CONDITIONS WERE NOT ideal for the test. Officials had hopes for 85-degree temperatures, but, at approximately 1:45 p.m., when the speed runs were made, the reading was only 75.5 degrees.
Nash came within shouting distance of the speed of sound—about 760 m.p.h. at sea level. The speed of sound—called MACH 1—has many times been surpassed by jet planes in dives at high altitudes—in fact, most jet pilots pass this barrier at some time or another—but never under the considerably more difficult conditions of an official attempt to break the world speed record.
NASH ALSO SET another record—being the first pilot to break a world speed record at below-sea-level altitudes. The Salton Sea is 235 feet below sea level and Nash’s Sabre jet was not believed to have gone above the sea level mark during his speed runs.
Scene of the run was a desolate, gully-slashed barren shore land about a mile and a half below Durmid, a railroad crossing, and just south of the Riverside-Imperial county lines.
About 100 newsmen, cameramen, manufacturers’ representatives and Air Force members were present. Head timer was C.S. Logsdon of Washington, D.C., director of the NAA Contest Division. Rules of the Federation Aeronautique Internationale and the Nationals Aeronautics [sic]Association (NAA) were followed.
Official timing was made with high speed movie cameras. Processing of those films was necessary before the exact official speed of the run could be determined.
—The Desert Sun, Palm Springs, California, Vol. XXVI, No. 17, Thursday, November 27, 1952, Page 2, Columns 1 and 2
The record-setting F-86D, 51-2945, was damaged in a ground collision with a Douglas RB-26C Invader, 44-35942, 29 October 1953, at K-14, Kinpo, Korea.
The The North American Aviation, Inc. F-86D Sabre was an all-weather interceptor developed from North American Aviation F-86 fighter. It was the first single-seat interceptor, and it used a very sophisticated—for its time—electronic fire control system. It was equipped with search radar and armed with twenty-four unguided 2.75-inch (69.85 millimeter) Mk 4 Folding-Fin Aerial Rockets (FFAR) rockets carried in a retractable tray in its belly.
The aircraft was so complex that the pilot training course was the longest of any aircraft in the U.S. Air Force inventory, including the Boeing B-47 Stratojet.
The F-86D was larger than the F-86A, E and F fighters, with a longer and wider fuselage. It was also considerably heavier. The day fighter’s sliding canopy was replaced with a hinged “clamshell” canopy. A large, streamlined radome was above the reshaped engine intake.
The F-86D Sabre was 40 feet, 3¼ inches (12.275 meters) long with a wingspan of 37 feet, 1½ inches (11.316 meters), and overal height of 15 feet, 0 inches (4.572 meters). The interceptor had an empty weight of 13,518 pounds (6,131.7 kilograms), and maximum takeoff weight of 19,975 pounds (9,060.5 kilograms). It retained the leading edge slats of the F-86A, F-86E and early F-86F fighters. The horizontal stabilizer and elevators were replaced by a single, all-moving stabilator. All flight controls were hydraulically boosted. A “clamshell” canopy replaced the sliding unit of earlier models.
The F-86D was powered by a General Electric J47-GE-17 engine. This was a single-shaft, axial-flow turbojet with afterburner. The engine had a 12-stage compressor, 8 combustion chambers, and single-stage turbine. The J47-GE-17 was equipped with an electronic fuel control system which substantially reduced the pilot’s workload. It had a normal (continuous) power rating of 4,990 pounds of thrust (22.20 kilonewtons); military power, 5,425 pounds (24.13 kilonewtons) (30 minute limit), and maximum 7,500 pounds of thrust (33.36 kilonewtons) with afterburner (15 minute limit). (All power ratings at 7,950 r.p.m.) It was 18 feet, 10.0 inches (5.740 meters) long, 3 feet, 3.75 inches (1.010 meters) in diameter, and weighed 3,000 pounds (1,361 kilograms).
The maximum speed of the F-86D was 601 knots (692 miles per hour/1,113 kilometers per hour) at Sea Level, 532 knots (612 miles per hour/985 kilometers per hour) at 40,000 feet (12,192 meters), and 504 knots (580 miles per hour/933 kilometers per hour)at 47,800 feet (14,569 meters).
The F-86D had an area intercept range of 241 nautical miles (277 statute miles/446 kilometers) and a service ceiling of 49,750 feet (15,164 meters). The maximum ferry range with external tanks was 668 nautical miles (769 statute miles/1,237 kilometers). Its initial rate of climb was 12,150 feet per minute (61.7 meters per second) from Sea Level at 16,068 pounds (7,288 kilograms). From a standing start, the F-86D could reach its service ceiling in 22.2 minutes.
The F-86D was armed with twenty-four 2.75-inch (69.85 millimeter) unguided Folding-Fin Aerial Rockets (FFAR) with explosive warheads. They were carried in a retractable tray, and could be fired in salvos of 6, 12, or 24 rockets. The FFAR was a solid-fuel rocket. The 7.55 pound (3.43 kilogram) warhead was proximity-fused, or could be set for contact detonation, or to explode when the rocket engine burned out.
The F-86D’s radar could detect a target at 30 miles (48 kilometers). The fire control system calculated a lead-collision-curve and provided guidance to the pilot through his radar scope. Once the interceptor was within 20 seconds of its target, the pilot selected the number of rockets to fire and pulled the trigger, which armed the system. At a range of 500 yards (457 meters), the fire control system launched the rockets.
Between December 1949 and September 1954, 2,505 F-86D Sabres (sometimes called the “Sabre Dog”) were built by North American Aviation. There were many variants (“block numbers”) and by 1955, almost all the D-models had been returned to maintenance depots or the manufacturer for standardization. 981 of these aircraft were modified to a new F-86L standard. The last F-86D was removed from U.S. Air Force service in 1961.
James Slade Nash was born at Sioux City, Iowa, 26 June 1921. He was the older of two sons of Harry Slade Nash, a farmer, and Gertrude E. Parke Nash. He attended Iowa State University before entering the United States Military Academy, West Point, New York, 1 July 1942. He graduated with a Bachelor of Science degree and was commissioned as a Second Lieutenant, U.S. Army Air Corps, 5 June 1945.
Slade Nash completed flight training and was promoted to First Lieutenant, 29 April 1947. He served as a pilot with the 8th Photographic Reconnaissance Squadron at Johnson Air Base, Sayama, Japan, and the 82nd Reconnaissance Squadron at Yokota Air Base, near Tokyo, Japan, flying the Northrop RF-61C Reporter.
Nash began training as a test pilot at Wright-Patterson Air Force Base in September 1948. Captain Nash was then assigned to the Air Force Flight Test Center (AFFTC) at Edwards Air Force Base, and remained in that assignment for six years. He was involved in testing the delta-wing Convair XF-92 and YF-102, and flew many operational U.S. fighters and bombers.
After overseas staff assignments, Nash attended the Air Command and Staff College, Maxwell Air Force Base, Montgomery, Alabama, graduating July 1960. He served in the office of the Secretary of the Air Force until 1963, and as a liaison officer to the United States Congress. From August 1964 to October 1965, Nash attended the Army War College, Carlisle Barracks, Pennsylvania.
Major Nash commanded the 92nd Tactical Fighter Squadron at RAF Bentwaters, Suffolk, England, and next was the deputy wing commander of the 81st Tactical Fighter Wing. Promoted to Lieutenant Colonel, he was assigned to Headquarters, U.S. Air Forces in Europe.
Colonel Nash served as vice commander of the 8th Tactical Fighter Wing at Ubon-Rachitani RTAFB, and flew 149 combat missions in the new gun-equipped McDonnell Douglas F-4E Phantom II.
Nash was promoted to Brigadier General in 1969, serving as Vice Commander, Air Defense Weapons Center, Tyndall Air Force Base, Florida, and next, Vice Commander, Defense Special Projects Group. He was promoted to Major General on 1 September 1973, with date of rank retroactive to 1 February 1971.
General Nash served as Chief, Military Assistance Advisory Group to the Republic of China, and later, to Spain. From 1973 until 1976, Major General Nash was head of the Military Assistance Advisory Group to the United Kingdom. He retired from the Air Force in 1979.
During his military career, he was awarded the Distinguished Service Medal, Legion of Merit, Distinguished Flying Cross with Oak Leaf Cluster (two awards), and eight Air Medals. He was rated a command pilot with more than 6,000 flight hours.
Major General James Slade Nash died 19 March 2005 at the age of 84 years. He is buried at the United States Air Force Academy Cemetery, Colorado Springs, Colorado.
17 November 1954: Lionel Peter Twiss, Chief Test Pilot for Fairey Aviation Company Ltd., was flying the company’s experimental supersonic airplane, the Fairey Delta 2, WG774, from the aircraft test center at RAF Boscombe Down, Salisbury, Wiltshire, England. This was the FD.2’s fourteenth flight.
When about 30 miles (48 kilometers) from the airfield and climbing through 30,000 feet (9,144 meters), the airplane’s fuel supply was interrupted and the engine flamed out.
Unwilling to lose a valuable research aircraft, Twiss decided to stay with the Delta 2 rather than ejecting, and he glided back to Boscombe Down, descending through a layer of cloud at 2,500 feet (762 meters). Without the engine running, the aircraft had insufficient hydraulic pressure to completely lower the landing gear and only the nosewheel strut locked in place. The FD.2 touched down at 170 miles per hour (274 kilometers per hour) and was seriously damaged.
WG774 was out of service for nearly a year. The wings had to be replaced and those which had originally been built for structural tests were used.
For his effort to save a valuable research aircraft, Peter Twiss was awarded the Queen’s Commendation for Valuable Service in the Air. Notice of the award was published in The London Gazette, 22 February 1955, at Page 1094:
Lionel Peter Twiss, Test Pilot, Fairey Aviation Company Ltd. (Hillingdon, Middlesex.)
For services when an aircraft, undergoing tests, sustained damage in the air.
On 10 March 1956, Peter Twiss flew WG774 to set a Fédération Aéronautique Internationale (FAI) World Record for Speed Over a 15km/25km Straight Course at an average speed over a 9-mile course, flown between Chichester and Portsmouth at and altitude of 38,000 feet (11,582 meters). Two runs over the course were made, with first averaging 1,117 miles per hour (1,798 kilometers per hour) and the second, in the opposite direction, was 1,147 miles per hour. (1,846 kilometers per hour). The FD.2 had averaged 1,822 Kilometers per hour (1,132 miles per hour)—Mach 1.731. ¹
Twiss had broken the previous record of 1,323.312 kilometers per hour (822.268 miles per hour) which had been set by Colonel Horace A. Hanes, U.S.Air Force, flying a North American Aviation F-100C Super Sabre over Edwards Air Force Base, California. ²
Peter Twiss was the first British pilot, and the FD.2 the first British airplane, to exceed 1,000 miles per hour (1,609 kilometers per hour) in level flight. Twiss is also the last British pilot to have held a World Absolute Speed Record.
For his services as a test pilot, Lieutenant-Commander Lionel Peter Twiss, D.F.C. and Bar, was appointed Officer of the Most Excellent Order of the British Empire, 13 June 1957.
The Fairey Aviation Company, Ltd., Delta 2 WG774 (c/n F9421) is the first of two single-place, single-engine delta-wing research aircraft which had been designed and built to investigate transonic and supersonic speeds. It first flew 6 October 1953 with Chief Test Pilot Peter Twiss in the cockpit.
In its original configuration, the FD.2 is 51 feet, 7½ inches (15.735 meters) long with a wingspan of 26 feet, 10 inches (8.179 meters) and overall height of 11 feet (3.353 meters). The wings’ leading edge were swept to 59.9° with an angle of incidence of +1.5°. Ailerons and flaps were at the trailing edge and acted in place of elevators. In its original configuration it had an empty weight of approximately 11,000 pounds (4,990 kilograms) and the all-up weight at takeoff was 14,109 pounds (6,400 kilograms).
The FD.2 was powered by a Rolls-Royce Avon RA.28R afterburning turbojet engine which produced 9,530 pounds of thrust (42.392 kilonewtons), or 11,820 pounds (52.578 kilonewtons) with afterburner (“reheat”). This was a single-shaft axial-flow turbojet with a 15-stage compressor and 2-stage turbine. The RA.28 was 10 feet, 3.0 inches (3.124 meters) long, 3 feet, 5.5 inches (1.054 meters) in diameter, and weighed 2,869 pounds (1,301 kilograms).
WG774 and its sistership, WG777, were used for flight testing throughout the 1960s. WG774 was modified as a test aircraft to study various features of the planned British Aerospace Concorde. The landing gear struts were lengthened and the fuselage extended by six feet. It received a “drooped” nose section for improved pilot visibility during takeoff and landings. New wings were installed which had an ogee-curved leading edge. With these modifications WG774 was redesignated BAC 221. In this configuration, WG774 was tested to Mach 1.65 at 40,000 feet (12,192 meters).
WG774 was retired in the early 1970s. It is on display at the Fleet Air Arm Museum, Yeovilton, Somerset, England.
Peter Lionel Winterton Twiss ³ was born 23 July 1921 at Lindfield, Sussex, England. He was the son of Colonel Dudley Cyril Twiss, M.C., a British Army officer, and Laura Georgina Chapman Twiss. Peter was educated at the Sherborne School, a prestigious boarding school for boys, in Dorset.
Twiss briefly worked as a tea taster for Brooke Bond & Company, but in 1939 enlisted as a Naval Airman, 2nd class, Royal Navy Volunteer Reserve. He trained at HMS St Vincent, a training school for the Fleet Air Arm at Gosport, Hampshire. He was appointed a Temporary Mishipman (Probationary), 26 August 1940. He was assigned to 771 Squadron, 27 January 1941, and was trained as a fighter pilot. Midshipman Twiss was commissioned as a Temporary Sub-Lieutenant (A), 23 July 1942.
Twiss was variously assigned to HMS Sparrowhawk, a Naval Air Station in the Orkney Islands, where he flew target tugs for gunnery training; HMS Daedalus, at Lee-on-Solent, Hampshire, England; and HMS Saker, a Royal Navy accounting base located in the United States.
Temporary Sub-Lieutenant (A) Lionel Peter Twiss, R.N.V.R., was assigned as the pilot of a Hawker Hurricane Mk.I with the Merchant Ship Fighter Unit. (Hurricanes could be launched by catapult from merchant ships to defend against Luftwaffe Focke-Wulf Fw 200 Condor reconnaissance bombers.)
He next flew the Fairey Fulmar fighter with No. 807 Squadron from HMS Argus (I49), in support of Malta in the Mediterranean Sea. Sub-Lieutenant Twiss is credited with shooting down one enemy fighter and damaging a bomber. He was awarded the Distinguished Service Cross, 22 September 1942. He and his squadron transitioned to the Supermarine Seafire aboard HMS Furious (47) and were in action during the invasion of North Africa. He was awarded a Bar, denoting a second award, to his D.S.C., 16 March 1943.
Sub-Lieutenant Twiss, D.S.C. and Bar, was promoted to the rank of Temporary Lieutenant, 17 August 1943. After returning to England, Twiss was trained as a night fighter pilot. He flew the de Havilland DH.98 Mosquito with an RAF night fighter unit on intruder missions over France. In 1944 he shot down two more enemy airplanes.
Later in 1944, Twiss was sent to the United States to work with the British Air Commission. In this position, he was able to fly various U.S. fighter aircraft, including the turbojet-powered Bell P-59 Airacomet.
Lieutenant-Commander Twiss was in the third class of the Empire Test Pilots’ School and after graduation he was assigned to Fairey Aviation for duty as a test pilot.
With the end of World War II, Lieutenant-Commander Twiss left the Royal Navy and continued working as a civilian test pilot at Fairey. He became to the company’s chief test pilot in 1954.
For his record-setting flight, in 1956 Twiss was awarded The Segrave Trophy of the Royal Automobile Club.
In the Queen’s Birthday Honours, 13 June 1957, Lionel Peter Twiss, Esq., D.S.C., Chief Test Pilot, Fairey Aviation Company, Ltd.,, was appointed an Ordinary Officer of the Civil Division of the Most Excellent Order of the British Empire (O.B.E.). His investiture took place at Buckingham Palace.
In 1958, The Royal Aeronautical Society awarded its George Taylor Gold Medal to Peter Twiss.
Peter Twiss ended his career testing aircraft in 1959, having flown more than 4,500 hours in nearly 150 different aircraft. His autobiography, Faster than the Sun, was published by Macdonald, London, in 1963.
He later worked for Fairey Marine.
Twiss made a brief appearance in the 1960 20th Century Fox motion picture, “Sink the Bismarck!” He portrayed the pilot of a Fairey Swordfish torpedo bomber which attacked the enemy battleship. In 1963, Peter Twiss appeared in the Eon Productions James Bond movie, “From Russia With Love.” He piloted one of the SPECTRE speedboats, which were chasing Bond and Tatiana Romanova.
Peter Twiss was married five times. His first wife was Constance A. Tomkinson.⁴ The marriage ended in divorce.
In the summer of 1950, Twiss married Vera Maguire at Wycombe, Buckinghamshire. They would have a daughter, Sarah. Their marriage also ended in divorce.
In June 1960, Twiss married Miss Cherry Felicity Huggins, a fashion model, actress, fashion magazine editor, pilot and race car driver, at Westminster, Middlesex, Their daughter Miranda was born in 1961. For a third time, Twiss’s marriage ended with a divorce. (Mrs. Twiss III would later marry Lord Charles Hambro, and become Lady Hambro.)
Twiss married his fourth wife, Mrs. Heather Danby (née Heather Linda Goldingham) at Gosport, Hampshire, on 4 November 1964. Mrs. Twiss IV died in 1988.
Finally, in December 2002, Peter Twiss married Jane M. de Lucey. They remained together until his death.
Lieutenant-Commander Lionel Peter Twiss, O.B.E., D.F.C. and Bar, died 31 August 2011 at the age of 90 years.
¹ FAI Record File Number 8866
² FAI Record File Number 8867
³ England and Wales, Civil Registration Birth Index, July, August and September 1921, at Page 868. Birth registered as “Twiss, Peter L. W.” Mother’s maiden name, “Chapman.”
⁴ A marriage license was issued to Lionel P. Twiss and Constance A. Tomkinson in New York City, New York, U.S.A., 24 October 1944.
17 November 1926: At Hampton Roads, Virginia, Major Mario de Bernardi, Regia Aeronautica, broke his own record, set just four days earlier, when he flew the Aeronautica Macchi M.39, number MM.76, to a new Fédération Aéronautique Internationale (FAI) World Record for Speed Over a 3 Kilometer Course with an average speed of 416.62 kilometers per hour (258.88 miles per hour).¹
The Macchi M.39 racing float plane was designed by Mario Castoldi. It was a single-place, single engine monoplane with two pontoons, or floats. The wing is externally braced, has 0° dihedral, and incorporates surface radiators. The M.39 was 6.473 meters (22 feet, 2.8 inches) long with a wingspan of 9.26 meters (30 feet, 4.6 inches) and height of 3.06 meters (10 feet, 0.5 inches). The empty weight of the Schneider Trophy racer was 1,300 kilograms (2,866 pounds) and its maximum gross weight was 1,615 kilograms (3,560 pounds).
The M.39 was powered by a water-cooled, normally-aspirated, 31.403 liter (1,916.329 cubic inch) Fiat AS.2 60° DOHC V-12 direct-drive engine with a compression ratio of 6:1. It used three carburetors and two magnetos, and produced 882 horsepower at 2,500 r.p.m. The engine drove a two-bladed, fixed-pitch metal propeller designed by Dr. Sylvanus A. Reed. The AS.2 engine was designed by Tranquillo Zerbi, based on the Curtiss Aeroplane and Motor Company’s D-12 engine. The engine was 1.864 meters (6 feet, 1.4 inches) long, 0.720 meters (2 feet, 4.4 inches) wide and 0.948 meters (3 feet, 1.3 inches) high. It weighed 412 kilograms (908 pounds).
The Macchi M.39 could reach 420 kilometers per hour (261 miles per hour).
Macchi M.39 MM.76 is in the collection of the Aeronautica Militare museum.
11 November 1937: At Augsburg, Germany, Dr.-Ing. Hermann Wurster set a Fédération Aéronautique Internationale (FAI) World Record for Speed Over a 3 Kilometer Course when he flew a prototype Bayerische Flugzeugwerke AG Bf 109, D-IPKY, to an average speed of 610.95 kilometers per hour (379.63 miles per hour) in four passes over a 3-kilometer course.¹ This broke the speed record set two years earlier by Howard Hughes with his Hughes H-1 Special, NR258Y, by 43.83 kilometers per hour (27.23 miles per hour).²
Versuchsflugzeug 13, the BFW Bf 109 V13, Werk-Nr. 1050 (FAI records describe it as a Messerchmitt BF113, and contemporary news reports referred to it as the Messerschmitt BF 113R), was one of four prototypes built from production Junkers Jumo 210-powered Bf 109B airframes to test the Daimler-Benz AG DB 600 engine. It was given a civil registration, D-IPKY. Along with two Bf 109B fighters, V13 was part of an aerial demonstration team which was sent to the International Flying Meeting at Dübendorf, Switzerland, during the last week of July 1937. It was equipped with a Daimler-Benz DB 600 rated at 960 horsepower.
On its return from Switzerland, V13 was prepared for a speed record attempt. It was given a standard drag reduction for racing airplanes, with all its seams filled and sanded smooth, and a coat of paint.
A modified version of the DB 601 engine was installed, reportedly capable of producing 1,660 horsepower for five minutes, with its maximum r.p.m increased from 2,500 to 2,800. It used special Bosch spark plugs. A three-bladed variable-pitch propeller was driven through gear reduction, although the gear ratio is unknown.
Like the Jumo 210, the Daimler-Benz 601 was a liquid-cooled, supercharged, single overhead cam, inverted 60° V-12, though with a much larger displacement. The DB 601 had a displacement of 33.929 liters (2,070.475 cubic inches). An improvement of the DB 600, the 601 series used direct fuel injection rather than a carburetor, and a hydraulically-driven two-speed supercharger.
A production Daimler-Benz DB 601 A had a compression ratio of 6.9:1 and was rated at 1,050 horsepower at 2,400 r.p.m. at 5.2 inches of pounds per square inch (0.36 Bar) of boost, for take-off (1 minute limit). It could produce 970 horsepower at 2,300 r.p.m. with 2.4 pounds per square inch (0.17 Bar) of boost at 12,000 feet (3,658 meters). Its propeller gear reduction ratio was 14:9. The DB 601 A was 67.5 inches (1.715 meters) long, 29.1 inches (0.739 meters) wide, and 40.5 inches (1.029 meters) high. It weighed 1,610 pounds (730.3 kilograms).
The Bf 109D production variant was developed from V13.
In 1938, BFW became Messerschmitt AG. The Bf 109 (also commonly called the Me 109) was produced from 1937 to 1945. Total production was 33,894 aircraft, which amounted to 57% of total fighter production for Germany. Seven plants produced the 109 during World War II. After the war ended, Czechoslovakia produced a variant until 1948. Another Spanish-built variant, the Hispano Aviación HA-1112, remained in production until 1958.
Herman Wurster was born at Stuttgart, Germany, 25 September 1907. In 1926, he began studying aircraft at Königlich Bayerische Technische Hochschule München (TH Munich) and at TH Stuttgart (the Stuttgart Technology Institute of Applied Sciences). He earned a doctorate in engineering (Dr.-Ing.) in 1933. He then became the chief designer for the German Research Institute for Aviation (Deutschen Versuchsanstalt für Luftfahrt) in Berlin.
In 1935 and 1936, Dr.-Ing. Wurster was a test pilot for the Luftwaffe‘s testing site at Rechlin, Mecklenburg, Germany. From 1936 until 1943, he was the chief test pilot for Bayerische Flugzeugwerk and Messerschmitt at Augsburg. From 1943 until the end of the war, Wurster was responsible for the development of Messerschmitt’s rocket-powered surface-to-air guided missile, the Enzian E.1 and its variants.
After the war, Dr.-Ing. Wurster founded a building materials company at Nördlingen, Bavaria. He died in Augsburg 17 October 1985 at the age of 78 years.