16 February 1967: At Ottobrun, Germany, test pilot Wilfried von Engelhardt made the first flight of the Bölkow-Entwicklungen KG Bo-105 prototype V-2, D-HECA, a twin-engine, rigid rotor helicopter. This was the second prototype. The first one was destroyed by ground resonance during pre-flight testing.
Messerschmitt AG merged with Bölkow-Entwicklungen KG in June 1968, becoming Messerschmitt-Bölkow. The following year, the new company merged with Blohm & Voss to become Messerschmitt-Bölkow-Blohm, or MBB. The Bo-105 entered production in 1970.
The Bo-105 is a 5-place light helicopter powered by two turboshaft engines. It has a four-bladed rigid (or hingeless) main rotor. This gives it a high degree of maneuverability, and it is capable of performing aerobatic maneuvers. The two-bladed tail rotor is mounted high on a pylon and gives exceptional ground clearance for a helicopter of this size. There are two “clam shell” doors located at the rear of the cabin section, giving access to a large flat floor. The helicopter has been widely used by military, law enforcement and as an air ambulance.
The Bo-105 is 38 feet, 11 inches (11.86 meters) long. The diameter of the main rotor is 32 feet, 3.5 inches (9.84 meters). Overall height is 9 feet, 10 inches (3.00 meters). The helicopter has an empty weight of 2,813 pounds (1,276 kilograms) and maximum takeoff weight of 5,511 pounds (2,500 kilograms).
The prototype was powered by two Allison 250-C18 turboshaft engines, with increasingly more powerful 250-C20, -C20B and C-28C engines being added through the production run. The Allison 250-C18 is a 2-spool, reverse-flow, gas turbine engine with a 6-stage axial-flow, 1-stage centrifugal-flow, compressor section, and a 4-stage axial-flow turbine (2-stage gas producer, and 2-stage power turbine). The 250-C18 is rated at 317 shaft horsepower at 6,000 r.p.m. (100% N2). These were very light weight engines, ranging from just 141 to 173 pounds (64.0 to 78.5 kilograms).
The helicopter’s cruise speed is 127 miles per hour (204 kilometers per hour) and maximum speed is 167 miles per hour (242 kilometers per hour). The range is 691 miles (1,112 kilometers. Service ceiling is 17,000 feet (5,180 meters).
The Bo-105 was produced in Germany, Canada, Spain, Indonesia and the Philippines from 1967 to 2001. More than 1,500 have been built.
Wilfried Baron von Englehardt died 24 January 2015 at the age of 86 years.
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. (FAI Record File # 8747) 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. (FAI Record File # 8748)
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.
12 October 1944: During World War II, Second Lieutenant Charles Elwood Yeager, U.S. Army Air Corps, was a P-51 Mustang fighter pilot assigned to the 363d Fighter Squadron, 357th Fighter Group, stationed at RAF Leiston (USAAF Station 373), near the village of Theberton, Suffolk, England.
Recently promoted from the warrant rank of Flight Officer, Lieutenant Yeager—as one of the most experienced pilots in the group— was leading the 357th on a bomber escort mission against Bremen, Germany. While the Group’s 362nd and 364th Fighter Squadrons remained with the B-24 bombers, Yeager and the 363d patrolled 50 to 100 miles (80 to 160 kilometers) ahead.
At 25,000 feet (7,620 meters) over Steinhuder Meer, northwest of Hanover, Yeager sighted a group of Messerschmitt Bf 109 fighters (also called the Me 109). He was soon able to count 22. Yeager and his squadron of 16 Mustangs circled and attacked out of the sun.
As Chuck Yeager maneuvered his P-51D Mustang, named Glamorous Glenn II, to fire at a trailing Bf 109, the German fighter suddenly turned left and collided with his wingman. Both pilots bailed out of their fighters and the two Bf 109s went down.
“It was almost comic, scoring two quick victories without firing a shot. . . By now, all the airplanes in the sky had dropped their wing tanks and were spinning and diving in a wild, wide-open dogfight. I blew up a 109 from six hundred yards—my third victory—when I turned to see another angling in behind me. Man I pulled back the throttle so damned hard I nearly stalled, rolled up and over, came in behind and under him, kicking right rudder and simultaneously firing. I was directly underneath the guy, less than fifty feet, and I opened up that 109 as if it were a can of Spam. That made four. A moment later, I waxed a guy’s fanny in a steep dive; I pulled up at about 1,000 feet; he went straight into the ground.“
— Yeager, An Autobiography, by Chuck Yeager and Leo Janos, Bantam Books, New York, 1985, at Page 57.
Lieutenant Yeager’s official report of the air battle reads (in part):
“H. Five Me. 109s destroyed
“I. I was leading the Group with Cement Squadron and was roving out to the right of the first box of bombers. I was over STEINHUDER LAKE when 22 Me. 109s crossed in front of my Squadron from 11:00 O’Clock to 1:00 O’Clock. I was coming out of the sun and they were about 1½ miles away at the same level of 25,000 feet. I fell in behind the enemy formation and followed them for about 3 minutes, climbing to 30,000 feet. I still had my wing tanks and had close up to around 1,000 yards, coming within firing range and positioning the Squadron behind the entire enemy formation. Two of the Me. 109s were dodging over to the right. One slowed up and before I could start firing, rolled over and bailed out. The other Me. 109, flying his wing, bailed out immediately after as I was ready to line him in my sights. I was the closest to the tail-end of the enemy formation and no one, but myself was in shooting range and no one was firing. I dropped my tanks and then closed up to the last Jerry and opened fire from 600 yards, using the K-14 sight. I observed strikes all over the ship, particularly heavy in the cockpit. He skidded off to the left. I was closing up on another Me. 109 so I did not follow him down. Lt. STERN, flying in Blue Flight reports this E/A on fire as it passed him and went into a spin. I closed up on the next Me. 109 to 100 yards, skidded to the right and took a deflection shot of about 10°. I gave about a 2 second burst and the whole fuselage split open and blew up after we passed. Another Me. 109 to the right had cut his throttle and was trying to get behind. I broke to the right and quickly rolled to the left on his tail. He started pulling it in and I was pulling 6″G”. I got a lead from around 300 yards and gave him a short burst. There were hits on wings and tail section He snapped to the right 3 times and bailed out when he quit snapping at around 18,000 feet. I did not blackout during this engagement due to the efficiency of the “G” suit. Even though I was skidding I hit the second Me. 109 by keeping the bead and range on the E/A. To my estimation the K-14 sight is the biggest improvement to combat equipment for Fighters up to this date. The Me. 109s appeared to have a type of bubble canopy and had purple noses and were a mousey brown all over. I claim five Me 109s destroyed.
“J. Ammunition Expended: 587 rounds .50 cal MG.
“Charles E. Yeager, 1st Lt, AC.”
Lieutenant Yeager had destroyed five enemy fighters during a single battle. He became “an Ace in one day” and was awarded the Silver Star. Of the twenty-two Me 109s, the 363rd had destroyed eight without losing a single Mustang.
Yeager’s Glamorous Glenn II, flown by another pilot, was destroyed six days later when it crashed in bad weather.
The P-51D was the predominant version of the North American Aviation World War II fighter. It was a single-seat, single-engine fighter, initially designed for the Royal Air Force. The P-51D was 32 feet, 3.5 inches (9.843 meters) long, with a wingspan of 37 feet (11.278 meters). It was 13 feet, 4.5 inches (4.077 meters) high. The fighter had an empty weight of 7,635 pounds (3,463 kilograms) and a maximum takeoff weight of 12,100 pounds (5,489 kilograms).
The P-51D was powered by a right-hand tractor, liquid-cooled, supercharged, 1,649-cubic-inch-displacement (27.04-liter) Packard V-1650-3 or -7 Merlin single overhead cam (SOHC) 60° V-12 engine with Military Power ratings of 1,380 horsepower at Sea Level, turning 3,000 r.p.m with 60 inches of manifold pressure (V-1650-3), or 1,490 horsepower at Sea Level, turning 3,000 r.p.m. with 61 inches of manifold pressure (V-1650-7). These engines were versions of the Rolls-Royce Merlin 63 and 66, built under license by the Packard Motor Car Company of Detroit, Michigan. The engine drove a four-bladed Hamilton Standard Hydromatic constant-speed propeller with a diameter of 11 feet, 2 inches (3.404 meters) through a 0.479:1 gear reduction.
The P-51D with a V-1650-7 Merlin had maximum speed at Sea Level of 323 miles per hour (520 kilometers per hour) at the Normal Power setting of 2,700 r.p.m. and 46 inches of manifold pressure, and 375 miles per hour (604 kilometers per hour) at War Emergency Power, 3,000 r.p.m with 67 inches of manifold pressure (5 minute limit). At altitude, using the Military Power setting of 3,000 r.p.m. and 61 inches of manifold pressure (15 minute limit), it had a maximum speed of 439 miles per hour (707 kilometers per hour) at 28,000 feet (8,534 meters). With War Emergency Power the P-51D could reach 442 miles per hour (711 kilometers per hour) at 26,000 feet (7,925 meters).
The P-51D could climb to 20,000 feet (6,096 meters) in 6.4 minutes, and to its service ceiling, 41,600 feet (12,680 meters), in 28 minutes. The airplane’s absolute ceiling was 42,400 feet (12,924 meters).
With 180 gallons (681 liters) internal fuel, the maximum range of the P-51D was 1,108 miles (1,783 kilometers).
The P-51D was armed with six electrically-heated AN/M2 .50-caliber Browning machine guns, with three mounted in each wing. 400 rounds of ammunition were provided for the inner pair of guns, and 270 rounds for each of the other four guns, for a total of 1,880 rounds of ammunition. This was armor piercing, incendiary and tracer ammunition. The fighter could also carry a 1,000 pound (453.6 kilogram) bomb under each wing in place of drop tanks, or up to ten rockets.
A total of 8,156 P-51Ds were produced by North American at Inglewood, California, and Dallas, Texas, and another 200 by the Commonwealth Aircraft Corporation, Melbourne, Australia.
The North American Aviation P-51D Mustang remained in service with the United States Air Force until 27 January 1957, when the last aircraft were retired from the 167th Fighter Squadron, West Virginia National Guard.
The KING has been graciously pleased to confer the Victoria Cross on the undermentioned officer in recognition of most conspicuous bravery : —
Flight Lieutenant James Brindley NICOLSON (39329) — No. 249 Squadron.
During an engagement with the enemy near Southampton on 16th August, 1940, Flight Lieutenant Nicolson’s aircraft was hit by four cannon shells, two of which wounded him whilst another set fire to the gravity tank. When about to abandon his aircraft owing to flames in the cockpit he sighted an enemy fighter. This he attacked and shot down, although as a result of staying in his burning aircraft he sustained serious burns to his hands, face, neck and legs.
Flight Lieutenant Nicolson has always displayed great enthusiasm for air fighting and this incident shows that he possesses courage and determination of a high order. By continuing to engage the enemy after he had been wounded and his aircraft set on fire, he displayed exceptional gallantry and disregard for the safety of his own life.
—The London Gazette, Number 34993, Friday, 15 November 1940, at Page 6569, Column 1
Peter Townsend wrote about Nick Nicolson’s battle in his history of the Battle of Britain, Duel of Eagles:
“Flight Lieutenant J.B. Nicolson of 249 Squadron was patrolling in his Hurricane west of Tangmere at seventeen thousand feet. He dived on some Ju. 88s when suddenly his Hurricane staggered. From somewhere behind bullets and cannon shells ripped through the hood, hit him in the foot and pierced his centre-tank. A searing mass of flame filled the cockpit. As he whipped into a steep turn he saw the offender, a Me. 110, slide below, diving hard. A wild resolve, stronger than reason, seized Nicolson. The cockpit a furnace, his dashboard ‘dripping like treacle’ and his hands fused by heat onto throttle and stick, he yelled, ‘I’ll get you, you Hun.’ And he went firing until the Me. 110 fell, until the frightful agony of his burns had passed the threshold of feeling. Then he struggled out of the cockpit and still wreathed in flames fell until the rush of cold air extinguished them. Only then did his mutilated hand fumble for the ripcord and somehow find strength to pull it. As if his sufferings were not already enough, some imbecile of a Home Guard fired at Nicolson and hit him fifty feet above the village of Millbrook in Hampshire.
“The gallant Nicolson was awarded the Victoria Cross. Of three thousand fighter pilots who fought in the battle ‘to defend the cause of civilization’ Nicolson alone among the defenders received the supreme award for valour. It was enough. The twenty-three-year-old pilot was typical of his young comrades. Alone in their tiny cockpits miles above the earth, there courage was of a peculiar kind which no medal, no material standard, could ever properly measure.”
— Duel of Eagles, Group Captain Peter Wooldridge Townsend, CVO, DSO, DFC and Bar, RAF. Cassell Publishers Limited, London, Chapter 23 at Pages 328–329.
Nick Nicolson’s fighter was a Hawker Hurricane Mk.I, P3576, with squadron markings GN A. It was in the third production block of 544 Hurricanes built by Hawker Aircraft Limited, Brooklands, between February and July 1940.
The Hurricane Mk.I was ordered into production in the summer of 1936. The first production airplane flew on 12 October 1937. The early production Hurricane Mk. I retained the wooden fixed-pitch propeller and fabric-covered wings of the prototype, though this would change with subsequent models. It was 31 feet, 4 inches (9.550 meters) long with a wingspan of 40 feet (12.192 meters) and overall height of 13 feet, 3 inches (4.039 meters). Its empty weight was 4,670 pounds (2,118 kilograms) and gross weight was 6,600 pounds (2,994 kilograms).
The Mk.I’s engine was a liquid-cooled, supercharged, 27.01 liter (1,648.96 cubic inches) Rolls-Royce R.M.1.S. Merlin Mk.III single-overhead-cam 60° V-12, rated at 990 horsepower at 2,600 r.p.m. at 12,250 feet (3,734 meters), and 1,030 horsepower at 3,000 r.p.m., at 10,250 feet (3,124 meters), using 87 octane aviation gasoline. The Merlin III drove the propeller through a 0.477:1 gear reduction ratio. It weighed 1,375 pounds (624 kilograms).
The fixed-pitch propeller was soon replaced with a three-bladed, two-pitch propeller, and then a three-bladed constant-speed propeller. Speed trials of a Mk.I equipped with a 10 foot, 9 inch (3.277 meters) diameter Rotol constant-speed propeller achieved a maximum True Air Speed in level flight of 316 miles per hour (509 kilometers per hour) at 17,500 feet (5,334 meters). The service ceiling was 32,250 feet (9,830 meters). The Mk.I’s range was 600 miles (966 kilometers) at 175 miles per hour (282 kilometers per hour).
The fighter was armed with eight Browning .303-caliber Mark II machine guns mounted in the wings.
At the beginning of World War II, 497 Hurricanes had been delivered to the Royal Air Force, enough to equip 18 squadrons. During the Battle of Britain, the Hurricane accounted for 55% of the enemy aircraft destroyed. Continuously upgraded throughout the war, it remained in production until 1944. A total of 14,503 were built by Hawker, Gloster and the Canadian Car and Foundry Company.
Eric James Brindley Nicolson was born 29 April 1917 at Hampstead, London, England. His parents were Leslie Gibson Nicolson and Dorothea Hilda Ellen Brindley. He was educated at the Tonbridge School in Kent, a private school which was founded in 1553. Nicolson was employed as an experimental engineer at Sir Henry Ricardo’s Engine Patents, Ltd., Shoreham, West Sussex, until joining the Royal Air Force in October 1936. On 21 December 1936, he was commissioned as a Pilot Officer. After flight training, P/O Nicolson served with No. 72 Squadron at RAF Church Fenton, North Yorkshire, August 1937–May 1940. He was promoted to Flying Officer, 12 May 1939.
On 29 July 1939, Eric Nicolson was married to Miss Muriel Caroline Kendall of Kirby Wharfe, Yorkshire.
Flying Officer Nicolson was assigned to No. 249 Squadron at RAF Leconfield, East Riding of Yorkshire, 15 May 1940, as an acting flight commander, and then promoted to Flight Lieutenant, 3 September 1940.
Following the action of 16 November, Flight Lieutenant Nicolson was hospitalized at the burn unit of Princess Mary’s Hospital, RAF Halton, Buckinghamshire, and then sent to a convalescent facility at Torquay, Devon. On 12 January 1941, he was promoted to Squadron Leader.
Nicolson returned to duty 24 February 1941, with 54 Operational Training Unit. From 21 September 1941 to 16 March 1942, he commanded No. 1459 Flight at RAF Hibaldstow, Lincolnshire. This was a night fighter unit, flying the Douglas Boston (P-70 Havoc). He was next assigned as a staff officer at Headquarters, 293 Wing, Royal Air Force, Alipore, West Bengal, India. After another staff assignment, Squadron Leader Nicolson was given command of 27 Squadron, a de Havilland Mosquito squadron at Agartala, in northeast India.
Nick Nicolson was promoted to Wing Commander 11 August 1944 and assigned to 3rd Tactical Air Force Headquarters in the Comilla Cantonment, East Bengal.
Wing Commander Eric James Brindley Nicolson, V.C., D.F.C., died 2 May 1945, while flying as an observer aboard a No. 355 Squadron Consolidated Liberator B Mk.VI, KH210, “R” (B-24J-85-CF 44-44071). At approximately 0250 hours, two engines caught fire. The bomber, piloted by Squadron Leader G.A. De Souza, RAF, and Flight Sergeant Michael Henry Pullen, Royal Australian Air Force, ditched in the Bay of Bengal, approximately 130 miles (209 kilometers) south of Calcutta. Of the eleven on board, only Pullen and one of the gunners survived.
Nicolson was the only RAF Fighter Command pilot awarded the Victoria Cross during World War II.
Before Germany could mount Operation Sea Lion, a cross-channel invasion of the British Isles, it needed to have complete air superiority over the invasion fleet. Because of the Luftwaffe‘s greater numbers and modern aircraft, German military leadership believed this could best be accomplished by defeating the Royal Air Force in air-to-air combat.
The Royal Air Force had been conserving their limited numbers of pilots and aircraft up to this point in the war. Germany’s plan was to send its bombers against targets that the R.A.F. would be forced to defend. The escorting Messerschmitt Bf-109s (also referred to as Me 109) would then shoot down the Boulton Paul Defiants and Bristol Blenheims. But the Hawker Hurricanes and Supermarine Spitfires were up to the task. While the Hurricanes went after the Luftwaffe’s Dornier 17 and Heinkel He 111 bombers, the Spitfires engaged their Me 109 and Fw 190 fighter escorts.
Britain used a system of radar-directed ground control of its fighter squadrons. The result was that, although both sides lost about the same number of aircraft, the Battle of Britain was a decisive victory for Great Britain. Germany was forced to give up on its plans for an invasion of England.
During a speech the House of Commons, 20 August 1940, Prime Minister Winston Churchill referred to the pilots of Fighter Command when he said,
“The gratitude of every home in our Island, in our Empire, and indeed throughout the world, except in the abodes of the guilty, goes out to the British airmen who, undaunted by odds, unwearied in their constant challenge and mortal danger, are turning the tide of the world war by their prowess and by their devotion. Never in the field of human conflict was so much owed by so many to so few.”
Ever since, the Royal Air Force has been known as “The Few.”
Royal Air Force aircraft:
Highly recommended:Duel of Eagles, by Group Captain Peter Townsend, CVO, DSO, DFC and Bar, Royal Air Force. Cassell Publishers Limited, 1970 and Castle Books, 2003.