Tag Archives: Test Pilot

19–20 February 1979

Professor Neil A. Armstrong in his classroom at the Iniversity of Cincinatti College of Engineering, 1974. (Peggy Palange, UC Public Informaton Office)
Professor Neil A. Armstrong in his classroom at the University of Cincinnati College of Engineering, 1974. (Peggy Palange, UC Public Information Office)

19–20 February 1979: Professor Neil A. Armstrong of the University of Cincinnati College of Engineering, member of the Board of Directors of Gates Learjet Corporation, former United States Navy fighter pilot, NACA/NASA research test pilot, Gemini and Apollo astronaut, and The First Man To Set Foot On The Moon, set five Fédération Aéronautique Internationale (FAI) and National Aeronautics Association class records for time to climb to an altitude and altitude while flying the prototype Learjet 28, serial number 28-001.

Professor Neil Armstrong and co-pilot Peter Reynolds in the cockpit of the record-setting Learjet 28, March 1979.
Professor Neil Armstrong and co-pilot Peter Reynolds in the cockpit of the record-setting Learjet 28.

Armstrong, with Learjet program test pilot Peter Reynolds as co-pilot, and with NAA observer Don Berliner aboard, flew the Learjet 28 to 15,000 meters (49,212.598 feet) in 12 minutes, 27 seconds at Kittyhawk, North Carolina on 19 February. On the same day, during a flight from Wichita, Kansas, to Elizabeth City, New Jersey, Armstrong flew the Learjet to 15,584.6 meters (51,130.577 feet), setting records for altitude and for sustained altitude in horizontal flight.

The following day, 20 February 1979, flying from Elizabeth City to Florence, Kentucky, Armstrong again set altitude and sustained altitude in horizontal flight, in a different class, by taking the Learjet to 15,585 meters (51,131.89 feet).

Learjet 28, serial number 28-001
Learjet 28, serial number 28-001

The Learjet 28 was a development of the Learjet 25 twin-engine business jet. It was operated by two pilots and could carry 6–8 passengers.  The Model 28 used a new wing design. It was the first civil aircraft to be certified with winglets. The prototype first flew 24 August 1977, and it received certification from the Federal Aviation Administration 29 July 1979.

The Learjet 28 is 47 feet, 7 inches (14.503 meters) long with a wingspan of 43 feet, 10 inches (13.360 meters) and overall height of 12 feet, 3 inches (3.734 meters). It has an empty weight of 8,267 pounds (3,749.9 kilograms) and gross weight of 15,000 pounds (6,803.9 kilograms).

The Learjet 28 is powered by two General Electric CJ610-8A turbojet engines, each  producing 2,850 pounds of thrust at Sea Level, and 2,960 pounds of thrust for takeoff (five minute limit).

The business jet has a cruise speed of 470 miles per hour (756.4 kilometers per hour) at 51,000 feet (15,544.8 meters). Its maximum speed is 549 miles per hour (883.5 kilometers per hour). Maximum range is 1,309 miles (2,106.6 kilometers). The service ceiling is 51,000 feet (15,544.8 meters), the same as the record altitude.

The aircraft was limited by its older technology turbojet engines, and only five Learjet 28s were built.

The first Learjet 28, serial number 28-001, has been re-registered several times. At the time of its FAI record-setting flights, it carried FAA registration N9RS. Later it was registered as N3AS. The most recent information shows it currently registered as N128LR.

A bronze statue of Neil Alden Armstrong in front of the Hall of Engineering.
A bronze statue of Neil Alden Armstrong in front of the Hall of Engineering.

Neil Alden Armstrong, one of America’s most loved heroes, passed away 25 August 2012.

Learjet 28 (Business Aviation Online)
Learjet 28 N128LR. (Business Aviation Online)

FAI Record File Num #2652 [Direct Link]
Status: ratified – superseded since approved
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1e (Landplanes: take off weight 3 000 to 6 000 kg)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 15 000 m
Performance: 12 min 27s
Date: 1979-02-19
Course/Location: Kitty Hawk, NC (USA)
Claimant Neil A. Armstrong (USA)
Aeroplane: Learjet 28 (N9RS)
Engines: 2 G E CJ-610

FAI Record File Num #8657 [Direct Link]
Status: ratified – superseded since approved
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1f (Landplanes: take off weight 6 000 to 9 000 kg)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Altitude in horizontal flight
Performance: 15 584.6 m
Date: 1979-02-19
Course/Location: Wichita, KS (USA) – Elisabeth City, NC (USA)
Claimant Neil A. Armstrong (USA)
Aeroplane: Learjet Learjet 28 (N9RS)
Engines: 2 G E CJ-610

FAI Record File Num #8670 [Direct Link]
Status: ratified – superseded since approved
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1f (Landplanes: take off weight 6 000 to 9 000 kg)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Altitude
Performance: 15 584.6 m
Date: 1979-02-19
Course/Location: Wichita, KS (USA) – Elisabeth City, NC (USA)
Claimant Neil A. Armstrong (USA)
Aeroplane: Learjet Learjet 28 (N9RS)
Engines: 2 G E CJ-610

FAI Record File Num #2653 [Direct Link]
Status: ratified – superseded since approved
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1e (Landplanes: take off weight 3 000 to 6 000 kg)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Altitude
Performance: 15 585 m
Date: 1979-02-20
Course/Location: Elizabeth City, NC (USA) – Florence, KY (USA)
Claimant Neil A. Armstrong (USA)
Aeroplane: Learjet 28 (N9RS)
Engines: 2 G E CJ-610

FAI Record File Num #2654 [Direct Link]
Status: ratified – superseded since approved
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1e (Landplanes: take off weight 3 000 to 6 000 kg)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Altitude in horizontal flight
Performance: 15 585 m
Date: 1979-02-20
Course/Location: Elizabeth City, NC (USA) – Florence, KY (USA)
Claimant Neil A. Armstrong (USA)
Aeroplane: Learjet 28 (N9RS)
Engines: 2 G E CJ-610

The first Learjet 28, serial number 28-001, registered as N128LR, in 2009. (Lone Mountain Aircraft Sales)
The first Learjet 28, serial number 28-001, registered as N128LR. (Lone Mountain Aircraft Sales)

© 2016, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

19 February 1982

The prototype Boeing 757-200, N7587A, in flight. (Boeing)
The prototype Boeing 757-200, N7587A, in flight. (Boeing)

19 February 1982: At Renton Municipal Airport, Boeing test pilots John H. Armstrong and Samuel Lewis (“Lew”) Wallick, Jr., made the first flight of the prototype Model 757 airliner, FAA registration N757A, serial number 22212. A problem with the number 2 engine (mounted on the right wing) required an air restart during the flight. The prototype landed at Paine Field, Everett, Washington, after 2 hours, 31 minutes.

Initially considered as an improved Boeing 727, the company determined that it was more economical to design an entirely new airplane. Along with the Model 767, which was developed concurrently, it was the first airliner produced with a “glass cockpit,” in which data is displayed on electronic screens rather than mechanical instruments.

The Boeing 757-200 is a twin-engine, medium-sized airliner intended for short or medium length routes. It is operated by two pilots and can carry up to 239 passengers.

The 757-200 is 155 feet, 3 inches (47.320 meters) long, with a wingspan of 124 feet, 10 inches (38.049 meters) and overall height of 44 feet, 6 inches (13.564 meters). The airliner has an empty weight of 127,520 pounds (57,842 kilograms) and a maximum takeoff weight of 255,000 pounds (115,666 kilograms).

The prototype was powered by two Rolls-Royce RB.211-535C turbofan engines. This is a three-spool engine using a single-stage fan, 12-stage compressor (6 intermediate- and 6 high-pressure stages), an annular combustor section, and a 5-stage turbine (1 high-, 1 intermediate- and 3 low-pressure stages). The RB.211-535C is rated at 37,400 pounds of thrust (166.36 kilonewtons). It is 9 feet, 10.5 inches (3.010 meters) long with a maximum diameter of 6 feet, 1.2 inches (1.859 meters) and weighs 7,294 pounds (3,594 kilograms).

Production aircraft were available with either Rolls-Royce RB.211-535E or Pratt & Whitney PW2037 engines, with thrust as high as 43,734 pounds (194.54 kilonewtons) per engine.

The Boeing 757 has a cruise speed of 0.8 Mach (530 miles per hour, or 853 kilometers per hour) at 35,000 feet (10,668 meters). The service ceiling is 42,000 feet (12,802 meters). Its maximum range is 4,718 nautical miles (7,593 kilometers).

The Model 757 was produced from 1981 to 2004 in both passenger and freighter variants, or a combination. 1,050 Boeing 757s were built.

The first 757, N757A, remains in service with Boeing. It is currently equipped with Pratt & Whitney PW2037 engines.

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

18 February 1977

Space Shuttle Enterprise captive flight test, 18 February 197718 February 1977: The prototype space shuttle orbiter Enterprise (OV-101) made its first captive flight aboard NASA 905, the Boeing 747-123 Shuttle Carrier Aircraft. On this flight, no one was aboard Enterprise. NASA 905 was flown by Aircraft Commander Fitzhugh L. Fulton, Jr., Pilot Thomas C. McMurty, and Flight Engineers Louis E. Guidry, Jr. and Victor W. Horton.

This photograph shows the crew of the Shuttle Carrier Aircraft, NASA 905, in 1981: From left, they are, Tom McMurty, pilot; Vic Horton, flight engineer; Fitz Fulton, command pilot; and Ray Young, flight engineer (replacing Guidry). The Space Shuttle Columbia is attached to NASA 905. (NASA)
This photograph shows the crew of the Shuttle Carrier Aircraft, NASA 905, in 1981: From left, they are, Tom McMurty, pilot; Vic Horton, flight engineer; Fitz Fulton, command pilot; and Ray Young, flight engineer (replacing Guidry). The Space Shuttle Columbia is attached to NASA 905. (NASA)

The duration of the first captive flight was 2 hours, 5 minutes. The Enterprise/SCA combination reached a maximum speed of 287 miles per hour (462 kilometers per hour) and altitude of 16,000 feet (94,877 meters).

NASA describes the photograph above:

The Space Shuttle prototype Enterprise rides smoothly atop NASA’s first Shuttle Carrier Aircraft (SCA), NASA 905, during the first of the shuttle program’s Approach and Landing Tests (ALT) at the Dryden Flight Research Center, Edwards, California, in 1977. During the nearly one year-long series of tests, Enterprise was taken aloft on the SCA to study the aerodynamics of the mated vehicles and, in a series of five free flights, tested the glide and landing characteristics of the orbiter prototype.

In this photo, the main engine area on the aft end of Enterprise is covered with a tail cone to reduce aerodynamic drag that affects the horizontal tail of the SCA, on which tip fins have been installed to increase stability when the aircraft carries an orbiter.

Boeing 747-123, N905NA, during wake vortex studies, 20 September 1974. The other aircraft in the photograph are a Cessna T-37B, N807NA and a Learjet 24, N701NA. (NASA)
Boeing 747-123, N905NA, during wake vortex studies, 20 September 1974. The other aircraft in the photograph are a Cessna T-37B, N807NA, and a Learjet 24, N701NA. (NASA)

NASA 905 (the airplane’s call sign is based on its FAA registration, N905NA) was originally built by Boeing for American Airlines as a 747-123 airliner, serial number 20107. It was delivered to American 29 October 1970 with the registration N9668. NASA acquired the airliner 18 July 1974 for use in wake vortex studies.

Modification to the SCA configuration began in 1976. Most of the interior was stripped and the fuselage was strengthened. Mounting struts for the space shuttle were added and end plates for additional stability were attached to the horizontal tail plane. The 747 retained the red, white and blue horizontal stripes of American Airlines’ livery until the early 1980s.

The standard Pratt & Whitney JT95-3A high bypass ratio turbofan engines were upgraded to JT9D-7J turbofans. This increased thrust from 46,950 pounds to 50,000 pounds (222.41 kilonewtons) each. The JT9D-7J is a two-spool, axial-flow turbofan engine with a single stage fan section, 14-stage compressor section and 4-stage turbine. This engine has a maximum diameter of 7 feet, 11.6 inches (2.428 meters), is 12 feet, 10.2 inches (3.917 meters) long and weighs 8,850 pounds (4,014 kilograms).

This image shows NASA 905 as configured for wake vortex studies and as a Shuttle Carrier Aircraft. Artwork courtesy of Tim Bradley Imaging.
This image shows NASA 905 as configured for wake vortex studies and as a Shuttle Carrier Aircraft. Artwork courtesy of Tim Bradley Imaging.

NASA 905 is 231 feet, 10.2 inches (70.668 meters) long with a wingspan of 195 feet, 8 inches (59.639 meters) and overall height of 63 feet, 5 inches (19.329 meters). Its empty weight is 318,053 pounds (144,266 kilograms) and maximum takeoff weight is 710,000 pounds (322,050 kilograms).

While carrying a space shuttle, the SCA maximum speed is 0.6 Mach (443 miles per hour, or 695  kilometers per hour). The service ceiling is 15,000 feet (4,572 meters) and its range is 1,150 miles (1,850.75 kilometers).

NASA 905 is displayed at Independence Park at Space Center Houston, a science and space learning center in Houston, Texas.

35 years, 2 months, 10 days after their first combination flight, the prototype Space Shuttle Orbiter Enterprise (OV-101) and Shuttle Carrier Aircraft NASA 905, touch down together for the last time, at John F. Kennedy International Airport, 11;23 a.m., EST, 27 April 2012. (AP)
35 years, 2 months, 10 days after their first combination flight, the prototype Space Shuttle Orbiter Enterprise (OV-101) and Shuttle Carrier Aircraft NASA 905, touch down together for the last time, at John F. Kennedy International Airport, 11:23 a.m., EST, 27 April 2012. (AP)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

18 February 1962

Major Walter F. Daniel, U.S. Air Force, in the cockpit of Northrop T-38A-40-NO Talon 61-0849 at Edwards AFB after setting four Fédération Aéronautique Internationale (FAI) time-to-altitude world records, 18 February 1962. (U.S. Air Force)
Major Walter F. Daniel, U.S. Air Force, in the cockpit of Northrop T-38A-40-NO Talon 61-0849 at Edwards AFB after setting four Fédération Aéronautique Internationale (FAI) time-to-altitude world records, 18 February 1962. (U.S. Air Force)

18 February 1962: At Edwards Air Force Base, California, Major Walter Fletcher Daniel set four Fédération Aéronautique Internationale (FAI) time-to-altitude records with a Northrop T-38A-40-NO Talon, serial number 61-0849.

The supersonic trainer reached 3,000 meters (9,843 feet) in 35.624 seconds; 6,000 meters (19,685 feet) in 51.429 seconds; 9,000 meters (29,528 feet) in 1 minute, 04.758 seconds; and 12,000 meters (39,370 feet) in 1 minute, 35.610 seconds.

FAI Record File Num #8718 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 3 000 m
Performance: 35.624s
Date: 1962-02-18
Course/Location: Edwards AFB, CA (USA)
Claimant Walter F. Daniel (USA)
Aeroplane: Northrop Grumman Ryan Aeronautical T-38A
Engines: 2 G E J85

FAI Record File Num #8604 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 6 000 m
Performance: 51.429s
Date: 1962-02-17
Course/Location: Edwards AFB, CA (USA)
Claimant Walter F. Daniel (USA)
Aeroplane: Northrop Grumman Ryan Aeronautical T-38A
Engines: 2 G E J85

FAI Record File Num #8599 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 9 000 m
Performance: 1 min 04.758s
Date: 1962-02-18
Course/Location: Edwards AFB, CA (USA)
Claimant Walter F. Daniel (USA)
Aeroplane: Northrop Grumman Ryan Aeronautical T-38A
Engines: 2 G E J85

AI Record File Num #8719 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 3 : turbo-jet
Type of record: Time to climb to a height of 12 000 m
Performance: 1 min 35.610s
Date: 1962-02-18
Course/Location: Edwards AFB, CA (USA)
Claimant Walter F. Daniel (USA)
Aeroplane: Northrop Grumman Ryan Aeronautical T-38A
Engines: 2 G E J85

Major Walter F. Daniel flew this Northrop T-38A-40-NO Talon, 61-0849, to four Fédération Aéronautique Internationale (FAI) time-to-altitude world records at Edwards AFB, 18 February 1962. (U.S. Air Force)
Major Walter F. Daniel flew this Northrop T-38A-40-NO Talon, 61-0849, to four Fédération Aéronautique Internationale (FAI) time-to-altitude world records at Edwards AFB, 18 February 1962. (U.S. Air Force)

The Northrop T-38A Talon is a two-place, twin-engine jet trainer capable of supersonic speed. It is 46 feet, 4 inches (14.122 meters) long with a wingspan of 25 feet, 3 inches (7.696 meters) and overall height of 12 feet, 10 inches (3.912 meters). The trainer’s empty weight is 7,200 pounds (3,266 kilograms) and the maximum takeoff weight is 12,093 pounds (5,485 kilograms).

The T-38A is powered by two General Electric J85-GE-5 turbojet engines. The J85 is a single-shaft axial-flow turbojet engine with an 8-stage compressor section and 2-stage turbine. The J85-GE-5 is rated at 2,680 pounds of thrust (11.921 kilonewtons), and 3,850 pounds (17.126 kilonewtons) with afterburner. It is 108.1 inches (2.746 meters) long, 22.0 inches (0.559 meters) in diameter and weighs 584 pounds (265 kilograms).

It has a maximum speed of Mach 1.08 (822 miles per hour, 1,323 kilometers per hour) at Sea Level. The Talon’s service ceiling of 55,000 feet (16,764 meters) and it has a maximum range of 1,093 miles (1,759 kilometers).

In production from 1961 to 1972, Northrop has produced nearly 1,200 T-38s. As of January 2014, the U.S. Air Force had 546 T-38A Talons in the active inventory. It also remains in service with the U.S. Navy, and the National Aeronautics and Space Administration.

Northrop T-38A-40-NO Talon 61-0849 at Maxwell Air Force Base, Alabama, 1993. (Photograph courtesy of Gary Chambers)
Northrop T-38A-40-NO Talon 61-0849 at Dannelly Field, Montgomery, Alabama, 1993. (Photograph courtesy of Gary Chambers)

The record-setting T-38, 61-0849, was retired to The Boneyard at Davis-Monthan Air Force Base, Tucson, Arizona, in 1993. It was later removed from storage and assigned to the 415th Flight Test Flight, Randolph Air Force Base, Texas, where it remained until March 2007. It is now on display at the Air Force Flight Test Museum, Edwards Air Force Base, California.

Northrop T-38A-40-NO Talon 61-0849 being towed to display site at the Air Force Flight Test Museum. (Rebecca Amber/U.S. Air Force)
Northrop T-38A-40-NO Talon 61-0849 being towed from the restoration hangar to display site at the Air Force Flight Test Museum. (Rebecca Amber/U.S. Air Force)

Walter Fletcher Daniel was born in 1925. He entered the U.S. Army Air Corps in 1943 and was trained as a fighter pilot. He was assigned to fly North American P-51 Mustangs and Republic P-47 Thunderbolts in post-war Germany. During the Korean War he served as a reconnaissance pilot of RF-51s and RF-80 Shooting Stars.

Walter Daniel graduated from the U.S. Air Force Experimental Test Pilot School in 1954 and was assigned to Wright-Patterson Air Force Base and later Edwards Air Force Base, where he was involved in flight testing all of the Century-series fighters. (F-100–F-106) It was while at Edwards that he flew the T-38A to set the time-to-altitude records.

By 1965, Colonel Daniel was the Chief of Flight Test Operations for the Lockheed YF-12A and SR-71A Blackbird Mach 3 aircraft. He set five world speed records and an altitude record and was awarded the Mackay Trophy.

After attending the Air War College, Daniel entered combat crew training in the McDonnell F-4 and RF-4 Phantom II, and was appointed Deputy Commander for Operations of the 432d Tactical Reconnaissance Wing at Udorn RTAFB. He flew 70 combat missions over North Vietnam.

In 1971 Colonel Daniel assumed command of the 75th Tactical Reconnaissance Wing (soon redesignated 67th TRW). He was promoted to brigadier general in 1972 and served as Inspector General, Air Force Systems Command.

Walter Fletcher Daniel was a member of the Society of Experimental Test Pilots. A command pilot, he had flown over 6,000 hours in more than 75 different aircraft types. General Daniel died 13 September 1974 at the age of 49 years. He is buried at the Arlington National Cemetery.

A team of volunteers place Northrop T-38A Talon 61-0849 in position at teh outdorr dsiplay area of the Air Force Flight Test Museum, Edwards Air force Base, California. (Rebecca Amber/U.S. Air Force)
A team of volunteers place Northrop T-38A Talon 61-0849 in position at the outdoor display area of the Air Force Flight Test Museum, Edwards Air Force Base, California. (Rebecca Amber/U.S. Air Force)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

16 February 1967

Wilfried von Englehardt tests the Bölkow-Entwicklungen KG Bo-105 V-2, D-HECA in an out-of-ground effect hover, with engine cowlings removed, 16 February 1967. (Eurocopter)
Wilfried von Englehardt tests the prototype Bölkow-Entwicklungen KG Bo-105 V-2, D-HECA, in an out-of-ground effect hover with engine cowlings removed, 16 February 1967. (Eurocopter)
Wilfried von Englehardt (Académie de l’Air et de l’Espace)
Wilfried von Englehardt (Académie de l’Air et de l’Espace)

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.

Messerschmitt-Bölkow-Blohm Bo-105 V-2, D-HECA. (Eurocopter)
Bölkow-Entwicklungen KG prototype Bo-105 V-2, D-HECA, during flight testing. (Eurocopter)

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 von Englehart tests the Bölkow-Entwicklungen KG Bo-105 V-2, D-HECA, at Ottobrun, Germany, 16 February 1967. (Eurocopter)
Wilfried von Englehart tests the Bölkow-Entwicklungen KG Bo-105 V-2, D-HECA, at Ottobrun, Germany, 16 February 1967. (Eurocopter)

Wilfried  Baron von Englehardt died 24 January 2015 at the age of 86 years.

Wilfried Baron von Englehardt 1928-2015)
Wilfried Baron von Englehardt (11 September1928–24 January 2015)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather