omniomni/omni-engineering huggingface dataset:
Scheibe SF-27. The Scheibe SF-27 Zugvogel V () is a single-seat Standard Class sailplane, designed and built in Germany in the 1960s. A motorised version was also produced. Significant numbers remain active.

Design and development

The SF-27 is a shoulder-wing, single-seat Standard Class sailplane, succeeding the Scheibe Zugvogel IIIB in production. It was designed to 1960s Standard Class competition rules requiring a span of no more than 15 m and a fixed undercarriage. Built of wood and steel, its structure was conservative; at a time when many manufacturers were using glassfibre structurally in wings and fuselages, the  SF-27 only used it to cover the forward fuselage.

The wing of the SF-27 is built around a single beechwood boxspar, with plywood ribs and a leading edge torsion box.  The wing covering is largely ply, entirely so over the outer section. The inner section is covered with ply from the leading-edge to behind the spar, the rest with a mixture of ply and fabric. Ailerons and Schempp-Hirth airbrakes are likewise ply covered. The cantilever horizontal tail is an all-moving ply and fabric-covered surface, set at the top of the fuselage; the fin is covered with ply  and the rudder with fabric.

The fuselage is a welded steel structure covered, from nose to wing trailing edge, with a glassfibre shell. The wing root fairing is also glassfibre.  Further aft the fuselage is fabric covered over wooden stringers.  The cockpit, within the glassfibre shell, has a single piece Plexiglas canopy, the pilot sitting in a semi-reclined position.  The SF-27 has a fixed monowheel undercarriage, fitted with brakes, plus a small tailwheel.

The SF-27 first flew on 12 May 1964.  30 had been built by February 1966, the final total being about 120. Scheibe also produced a motorised version, the SF-27M, with a 26 hp (19 kW) 4-cylinder Hirth F-102 A2 two stroke engine on a retractable mast above the wing behind the cockpit.  Its gross weight is increased to 386 kg (850 lb) and it is  longer, with a best glide ratio 32:1.

Operational history

Around 58 of the original 120 Sf-27s are still active in 2010, including several SF-27Ms.

Variants
SF-27A
Standard class sailplane.
SF-27B
One-off 17 m span version.
SF-27M
Motorised version.
SLCA-10 Topaze
Licence built variant built in France by Société Lorraine de Constructions Aéronautiques (SLCA)

Specifications (SF-27A)

References

Notes

Bibliography

1960s German sailplanes
SF-27
Shoulder-wing aircraft
Aircraft first flown in 1964
Single-engined piston aircraft
Dart Skycycle. The Dart Skycycle is an American single-seat, high wing, strut-braced, single-engine, conventional landing gear ultralight aircraft that was designed by Robert Dart and produced by Dart Aircraft of Mayville, New York for amateur construction.

Design and development
Introduced in 1985, the Skycycle is a single-seater designed as an FAR 103 Ultralight Vehicles-compliant aircraft with an empty weight within that category's  empty weight limit.

The aircraft has a 4130 steel tube frame fuselage and a wing constructed from spruce, all covered in doped fabric. The landing gear is bungee-suspended. The Skycycle can be built with an open cockpit or fully enclosed, allowing flying in cooler weather. The Skycycle was available as plans only or with some prefabricated components, such as the welded fuselage or assembled wings already completed. The standard engine specified was the  Rotax 277.

Reviewer Andre Cliche wrote: "The Skycycle is an ultralight-legal aircraft that resembles the average taildraggers of the 40s and 50s. It looks like a 'real airplane' and should satisfy the more conservative pilots who hesitate to fly 'colourful lawn chairs' as basic ultralights are sometimes called. It is a good all-around ultralight that is easy to fly and cheap to operate."

Specifications (Skycycle)

See also

References

1980s United States ultralight aircraft
High-wing aircraft
Single-engined piston aircraft
Ed Woll. Ed Woll (1914-2010) was an American engineer who developed the first modern gas turbine engines for General Electric.

Woll led development of the T58, T64, and T700 turboshaft engines. Woll also led the F404, F101, F110 turbofan military engines, and GE27, and CFM56 civilian engines.

Early life 

In 1946 Woll worked at the Power Plant Laboratory at Wright-Patterson Field in Dayton, Ohio and Edwards Air Force Base in California.

Woll developed the afterburner for the J35 engine, later developing the J47 variable afterburner.

GE career 
Woll led the General Electric T58 and T64 helicopter and turboprop engine programs starting in 1953 with innovations such as corrosion-resistant high-temperature coatings.

Woll was a lead in developing the J85, CJ610, and CF700 engines which enabled lightweight jet fighters, such as the Northrop F-5, Northrop T-38 trainers, and early business jets like the LearJet and Fanjet Falcon. Woll resisted the urge to consolidate GE engineering, saving the GE's Lynn (MA) River Works from shutdown.

In 1964, Woll led development of the  thrust GE15 (later YJ101) which evolved into the F404 used in the McDonnell Douglas F/A-18 Hornet and other aircraft.

Woll later led the F101X, evolving (via the "Great Engine War") into the F110 used to re-engine the F-14, F-15, and F-16.

Championing customer service and support, Woll retired in 1979 after developing the CF6, and CFM56 with Snecma.

References 

American aerospace engineers
2010 deaths
1914 births
ChME3. The ČKD ČME3 is a six-axle diesel–electric locomotive built by ČKD. The class was used primarily for shunting and mainline duties. With over 8,000 produced during a production run of 31 years, it is one of the most produced locomotives in the world. Units have been operated by Russia, Belarus, Ukraine (as class ЧМЭ3, transliteration ChME3) and other ex-Soviet bloc countries, in Czechoslovakia (as class T669.0, T669.1 and T669.5, later as ŽSR 770 and ČD 770 in Slovakia and the Czech Republic), on industrial railways in Poland (S200), in Albania (HSH T669.1), Iraq (DES 3101), Syria (LDE 1500) and in India (DEC 120).

The ČKD ČME3 is classified as a Co-Co or C-C diesel–electric locomotive, with all six axles powered. As such, it is particularly suited for pulling heavy, slow freight and cargo trains.

Gallery

References

Sources
 
 
 
 , English-language version 
 , English-language version 
 
 
 

Diesel–electric locomotives of the Soviet Union
Diesel–electric locomotives of Russia
Railway locomotives introduced in 1963
ChME3
Standard gauge locomotives of Czechoslovakia
5 ft 6 in gauge locomotives
5 ft gauge locomotives
Standard gauge locomotives of the Czech Republic
Standard gauge locomotives of Slovakia
Standard gauge locomotives of Albania
Diesel–electric locomotives of Czechoslovakia
Diesel–electric locomotives of the Czech Republic
Diesel–electric locomotives of Albania
Diesel–electric locomotives of Slovakia
Shunting locomotives

pl:S200#W ZSRR
Alaska-class oil tanker. The Alaska-class oil tanker is a class of VLCC tankers built by National Steel and Shipbuilding Company, San Diego. The tankers are double-hulled as mandated by the Oil Pollution Act of 1990, and will replace the existing fleet used by BP in the Alaskan area.

Design

Ships in class 
Four ships have been completed: Alaskan Frontier, Alaskan Explorer, Alaskan Navigator, and Alaskan Legend.

Derivatives 
The design was the basis of the Montford Point class of Mobile Landing Platforms for the US Navy.

References

Oil tankers
Petroleum in Alaska
Ships of BP
Ship classes
Charles Sadron. Charles Louis Sadron (12 May 1902 – 5 September 1993), was a French physicist who specialized in the study of biological macromolecules.

Biography 
Sadron was born in Cluis and studied at the University of Poitiers and later obtained a teaching position at Lycée Kléber in Strasbourg. While teaching at the high school, he obtained his PhD in 1932 at the University of Strasbourg on the magnetic properties of metals under the supervision of Pierre Weiss. He obtained a Rockefeller scholarship afterwards and worked at California Institute of Technology from 1933 to 1934. Sadron returned to France and became a professor at the University of Strasbourg in 1937.

In 1945, Sadron founded the Centre for the Study of Macromolecular Physics (Centre d'Étude de Physique Macromoléculaire or CEPM), which was renamed in 1954, as the Centre for Macromolecular Research (Centre de Recherche sur les Macromolécules or CRM). He was appointed director there until 1967.
In 1967, he moved to Orléans where he became head of the Centre de Biophysique Moléculaire (CBM, Center for Molecular Biophysics) at the University of Orléans. Sadron was the first laureate of the Holweck Prize, given by the British Institute of Physics in 1946.

Institut Charles Sadron 

In 1985, the CRM and the École d'Application des Hauts Polymères (EAHP, School of Application of High Polymers) were merged into the Institut Charles Sadron (ICS).  The Institut Charles Sadron (UPR 22), is a research center of the CNRS (National Centre of Scientific Research), associated with the University of Strasbourg.

Publications 
 Dynamic aspect of conformation changes in biological macromolecules, Reidel, 1973.

References

External links
 L’Institut Charles Sadron 
 Centre National de la Recherche Scientifique

Interviews 
 http://www.ina.fr/economie-et-societe/vie-economique/video/CAF97059039/charles-sadron-les-macromolecules.fr.html
 https://web.archive.org/web/20110720232423/http://www.histcnrs.fr/Sadron.html

French physicists
1902 births
1993 deaths
Academic staff of the University of Strasbourg
People from Indre
University of Poitiers alumni
Rockefeller Fellows
French biophysicists
University of Strasbourg alumni
Academic staff of the University of Orléans
National Museum of Natural History (France) people
Sheldon Axler. Sheldon Jay Axler (born November 6, 1949, Philadelphia) is an American mathematician and textbook author. He is a professor of mathematics and the Dean of the College of Science and Engineering at San Francisco State University.

He graduated from Miami Palmetto Senior High School in Miami, Florida in 1967. He obtained his AB in mathematics with highest honors at Princeton University (1971) and his PhD in mathematics, under professor Donald Sarason, from the University of California, Berkeley, with the dissertation "Subalgebras of " in 1975. As a postdoc, he was a C. L. E. Moore instructor at the Massachusetts Institute of Technology.

He taught for many years and became a full professor at Michigan State University. In 1997, Axler moved to San Francisco State University, where he became the chair of the Mathematics Department.

Axler received the Lester R. Ford Award for expository writing in 1996 from the Mathematical Association of America for a paper titled "Down with Determinants!" in which he shows how one can teach or learn linear algebra without the use of determinants. Axler later wrote a textbook, Linear Algebra Done Right (4th ed. 2024), to the same effect.

In 2012, he became a fellow of the American Mathematical Society. He was an Associate Editor of the American Mathematical Monthly and the Editor-in-Chief of the Mathematical Intelligencer.

Books
 Linear Algebra Done Right, fourth edition, Undergraduate Texts in Mathematics, Springer, 2024.
 (with John E. McCarthy, and Donald Sarason) editors. Holomorphic Spaces, Cambridge University Press 1998.
 (with Paul Bourdon, and Wade Ramey) Harmonic Function Theory, second edition, Graduate Texts in Mathematics, Springer, 2001.
 Harmonic Function Theory software, a Mathematica package for symbolic manipulation of harmonic functions, version 7.00, released 1 January 2009 (previous versions released in 1992, 1993, 1994, 1996, 1999, 2000, 2001, 2002, 2003, and 2008).
 Precalculus: A Prelude to Calculus, Wiley, 2009 (third printing, 2010).
 (with Peter Rosenthal and Donald Sarason) editors. A Glimpse at Hilbert Space Operators, Birkhäuser, 2010.
 College Algebra, John Wiley & Sons 2011.
 Algebra & Trigonometry, John Wiley & Sons, January 2011.
 Measure, Integration & Real Analysis (open access, updated 2020), Springer, November 2019.

References

External links
 Axler's Home Page
 
 College of Science & Engineering Newsletter from San Francisco State University.
 Senior Fellow Sheldon Axler from California Council on Science and Technology. 
 Author profile in the database zbMATH

20th-century American mathematicians
21st-century American mathematicians
1949 births
Living people
San Francisco State University faculty
Fellows of the American Mathematical Society
Princeton University alumni
Place of birth missing (living people)
UC Berkeley College of Letters and Science alumni
People from Miami
Michigan State University faculty
Mathematicians from Philadelphia
Massachusetts Institute of Technology School of Science faculty
American textbook writers
Franco Piperno. Franco Piperno (5 January 1943 – 13 January 2025) was an Italian communist militant. He was an associate professor of Condensed Matter Physics in the University of Calabria.

Life and career
Piperno was born in Catanzaro in a Jewish family. He graduated in physics at the University of Pisa and  was member of the FGCI (Italy's communist youth organization). After his expulsion, in 1969 he was suspected of having sabotaged a Boston Chemical plant, which produced defoliant used in the Vietnam War, but he was immediately released. In Rome he was an activist in the 1968 movement and in the summer 1969 he took part in the demonstration against Fiat in Turin.

In the late 1969, with Oreste Scalzone and Toni Negri, he was  one of the founders of the far-left organisation Potere Operaio, and later he was a member of Autonomia Operaia. He also led the wing of Potere Operaio called Lavoro Illegale ("Illegal Work").

With Negri, Scalzone, and others, he was charged with the publication of subversive magazines in 1979 but he escaped capture. In 1980 he was absolved, but one year later he was  condemned to ten years of imprisonment in another trial  for insurrectional activity and participation in the kidnapping and murder of Aldo Moro. In particular, he was accused of having acted as a negotiator (through one of the kidnappers, Valerio Morucci) between the Italian Socialist Party and the terrorists who were allegedly detaining Moro. Documents left by the journalist Mino Pecorelli after his murder also hinted at an involvement of Piperno in the kidnapping. Piperno then lived in exile for several years, first in France thanks to the Mitterrand doctrine and then in Canada, where he also obtained a position at the University of Montreal and then at the Faculte St. Jean at the University of Alberta in Edmonton. Most of the charges were later dropped, and the sentence was reduced to four years.

Piperno returned to Italy from Canada in 1990, and became active locally in his hometown, Cosenza, creating the cultural association Ciroma. In January 1996 his car was hit by four handgun bullets. In May 1996 Piperno became a  member of the local council of the city of Cosenza.

Piperno died on 13 January 2025, at the age of 82.

See also
 Autonomism
 Primavalle Fire
 Kidnapping of Aldo Moro

References

External links

1943 births
2025 deaths
Autonomism
Autonomia Operaia
Italian communists
Libertarian socialists
Italian people of Jewish descent
People from Catanzaro
Potere Operaio
Robotti. Robotti is an Italian surname. Notable people with the surname include:

Aurelio Robotti (1913–1994), Italian engineer and professor
9796 Robotti, a minor planet named after Aurelio Robotti
Enzo Robotti (born 1935), former Italian footballer
Mario Robotti (1882–1955), Italian general in the Royal Italian Army
Nadia Robotti, Italian historian of physics

Italian-language surnames
Wood Sky Pup. The Wood Sky Pup is an American single-seat, high wing, cantilever, single engine, conventional landing gear ultralight aircraft that was designed by Stephen K. Wood of Whitewater, Colorado for amateur construction.

Design and development
Introduced in 1982, the Sky Pup is a single seater designed as an FAR 103 Ultralight Vehicles compliant aircraft with an empty weight within that category's  empty weight limit. The aircraft was intended to require the minimum financial investment and the designer intended that the airframe would be able to be completed for US$1000 using locally available materials. Cliche reported in 2001 that Sky Pups had been completed for US$2000, including the engine. Its shape has been described as imitating the 1930s Aeronca C-2 "flying bathtub".

The airframe is constructed from Douglas fir and styrofoam, all covered in Dacron or polyester fabric. The wing is a three-piece design, allowing quick disassembly for transport or storage. The landing gear suspension is made from maple wood. The Sky Pup can be built with an open cockpit or fully enclosed, allowing flying in cooler weather. The Sky Pup is available as plans only. The power range specified is , with the largest engine specified the  Rotax 277. The  2si 215,  Hirth F-33 and  Zenoah G-25 have also been used.

The design was professionally engineered and incorporates a very clean cantilever wing that results in a 12:1 glide ratio. The control system is two-axis, using only elevator and rudder controls, roll being introduced by rudder via a generous dihedral angle. The elevator is stick-controlled, while the rudder is controlled via conventional aircraft pedals. The aircraft is stall and spin proof. Reported construction times are 450–600 hours.

Plans were initially sold direct by the designer and, in the early 2000s, by the Vintage Ultra and Lightplane Association. Later the designer's son marketed the plans and this is the current source.

Specifications (Sky Pup)

See also

References

External links
Photo of a Sky Pup
 Construction of a Skypup

1980s United States ultralight aircraft
Single-engined tractor aircraft
High-wing aircraft
Aircraft first flown in 1980
Aircraft with fixed conventional landing gear
Ralph C. Bryant. Ralph Clement Bryant, Sr. (22 January 1877 – February 1, 1939) was an early American professor of forestry, the author of the pioneer textbook and other books and notes in forestry. Logging (1913)

Education and career

R. C. Bryant was the first person to receive a forestry degree in the United States, as a graduate from the New York State College of Forestry at Cornell (1900, Forest Engineer degree).

His positions include: Forester of New York State Forest, Fish and Game Commission (1900–1901), Assistant Chief Forester of Philippine Bureau of Forestry (1902–1905), U.S. Forest Service (1905–1906), Professor of Lumbering, Yale University (1906–1939).

References

External links 

 Guide to the Ralph Clement Bryant Family Papers 1899

1877 births
1939 deaths
Forestry academics
American foresters
Filipino foresters
New York State College of Forestry
Cornell University alumni
Yale University faculty
History of forestry in the United States
People from Princeton, Illinois
Manoj Datta. Dr. Manoj Datta is  an Indian engineer specialized in geotechnical engineering, foundation engineering, ground engineering, earth dams, landfill engineering and geoenvironmental engineering. He is a native of North Western India where he was born in the year 1955 in the town of Jallandhar in Punjab, India. His early years were at the Nangal township where his father was posted as an engineer involved in the design and construction of the prestigious Bhakra Dam and the Beas Satluj Link Project. Dr. Datta finished his school education at St. John’s High School at Chandigarh. Prof. Datta obtained his B.Tech (Civil Engg.) from IIT Delhi in 1977, with a Director’s Silver Medal for standing first amongst the graduating students and then obtained his Ph.D. degree from the same institute in 1980.

As an Academician he was the Director of Punjab Engineering College University of Technology and chairperson, Organizing Committee of 6th International Congress on Environmental Geotechnics,.  He was also held the office of Dean (Alumni & International Programmes) at Indian Institute of Technology Delhi (2004–2007) and retains his lien as Professor of Civil Engineering at the same institute.

Awards
 Director's silver medal at I.I.T. Delhi for being first amongst Civil Engineering Students Graduating in 1977.
 Indian Geo technical Society – ONGC best paper award (1986)
 Indian Geo technical Society – ONGC best paper award (1989)
 Indian Geo technical Society  – AIMIL best paper award (1990)
 Indian Geo technical Society – ONGC best paper award (1993)
 Indian Geo technical Society – Prof. Dinesh Mohan best paper award  (1996)
 Indian Geo technical Society (Delhi chapter) - Leadership Award (2008)

Publications
 Raju, V.S., Datta, M., Seshadri, V., and Agarwal, V.K. (1996) (Eds.), "Ash Ponds and Ash Disposal Systems", Narosa Publishers, Delhi,424 pages.
 Datta, M. (1997) (Ed.), "Waste Disposal in Engineered Landfills", Narosa Publishers, Delhi, 231 pages.
 Datta, M., Parida, B.P., Guha, B.K. and Sreekrishnan, T., (1999) (Eds.), "Industrial Solid Waste Management and Landfilling Practice", Narosa Publishers, Delhi, 204 pages.
 Gulhati, S.K. and Datta, M (2005), Geotechnical Engineering, Tata Mcgraw Hill, Delhi, 738 pages

Datta also published over 101 papers (including 21 in journals, 33 in International Conferences and 47 in National Conferences and Seminars)

References

Engineers from Punjab, India
Living people
Geotechnical engineers
Year of birth missing (living people)