omniomni/omni-engineering huggingface dataset:
Nord Noroit. The Nord 1400 Noroit was a French reconnaissance and air-sea rescue flying boat designed and built by Nord Aviation for the French Navy.

Development
The Noroit was an amphibian flying boat designed for the French Navy, a cantilever gullwing monoplane with a two-step hull. It had a cantilever horizontal tail surface with three vertical surfaces. It had an enclosed cabin for the seven crew with a large cabin in the rear for use in rescue operations. The aircraft had two engines located one on each wing leading edge. The prototype as a flying boat first flew on 6 January 1949 powered by two  Gnome-Rhône 14R radial engines. The second aircraft was fitted with a retractable tailwheel landing gear for amphibious operation which was later retrofitted to the prototype. The next two aircraft first flown in 1949 were designated the Nord 1401 Noroit and were fitted with two  Junkers Jumo 213 engines and both were also tested with two Bristol Hercules radial engines. These two aircraft were modified to production standard as the Nord 1402 Noroit and were followed by 21 production aircraft. The last aircraft was delivered to the French Navy in 1956.

Variants
Nord N.1400 Noroit
Two prototypes with  Gnome-Rhône 14R radial engines.
Nord N.1400-01
The first N.1400 Noroit prototype.
Nord N.1400-02
The second N.1400 Noroit prototype.
Nord N.1401 Noroit
Two pre-production aircraft with  Junkers Jumo 213 engines, later modified to 1402 standard.
Nord N.1402 Noroit
Production variant, powered by  Arsenal 12H engines; 21 built plus two 1401 pre-production aircraft modified.

Operators

French Navy
Escadrille 5F

Specifications (1402)

See also

References

 
 

1940s French military reconnaissance aircraft
Flying boats
Noroit
Gull-wing aircraft
High-wing aircraft
Aircraft first flown in 1949
Twin piston-engined tractor aircraft
Fletcher FBT-2. The Fletcher FBT-2 was a military trainer aircraft built in the United States in the early 1940s. Although it was never entered production as a trainer, it was ordered in small numbers as a target drone but when that was cancelled played a small part in the development of guided bombs.

Design and development
The FBT-2 was a low-wing cantilever monoplane with fixed tailwheel undercarriage which seated the pilot and instructor in tandem in an enclosed cockpit. Construction throughout was of plywood, and the wings were interchangeable, as were the tail panels.

Operational history
A single prototype was evaluated for military use, but generated no interest. However, the USAAF ordered the type as a radio-controlled target drone under the designation XPQ-11. The prototype FBT-2 was modified for use as a drone controller as the YCQ-1A. Two batches of 50 drones were ordered; however before any were delivered, the type was cancelled in favor of the PQ-8 Cadet, only the single prototype XPQ-11 being completed. The Army then ordered the ten PQ-11s under construction to be completed as XBG-1 glide bombs, the engine being removed and replaced with a  bomb. Testing was conducted, but the type failed to enter operational service.

Variants

 FBT-2 - basic trainer with Wright R-760 engine and tailwheel undercarriage (1 built)
 CQ-1 - drone controller with tricycle undercarriage (1 converted from FBT-2)
 PQ-11 - aerial target with tricycle undercarriage and Pratt & Whitney R-985 engine (contract cancelled before aircraft completed)
 BG-1 - glide bomb with  warhead (10 built from unfinished PQ-11s)

Operators

United States Army Air Forces

Specifications (FBT-2)

See also

References

Citations

Bibliography

FBT-2
1940s United States military trainer aircraft
Low-wing aircraft
Single-engined tractor aircraft
Unmanned aerial vehicles of the United States
Target drones
World War II guided missiles of the United States
Aircraft first flown in 1941
PZL-102 Kos. The PZL-102 Kos (blackbird) is a Polish two-seat touring and training monoplane designed and built by PZL.

Development
First flown on 21 May 1958 by Mieczysław Miłosz the PZL-102 was designed as a semi-aerobatic two-seat light monoplane and was later given the name Kos. The Kos was an all-metal low-wing cantilever monoplane with fabric tail control surfaces. It had a fixed tailwheel landing gear and the prototype had a nose-mounted 65 hp (48 kW) Narkiewicz WN-1 flat-four engine. The Kos had an enclosed cockpit for two side-by-side. After a number of prototypes the production aircraft (designated PZL-102B) first flew in October 1959, with Continental C90 engine and changed wing construction. Only short series was produced, because it needed imported engine.

Operational history
Between 13 May and 8 June 1960 Antoni Szymański made 9000 km commercial flight on PZL-102B on route Warsaw - Vienna - Geneva - Reims - London - Luxembourg - Berlin - Warsaw.

Seven aircraft were sold abroad. Austrian aircraft were operated for agrospraying purposes. Tank filled with chemical agent was placed on the passenger seat.

One PZL-102 has been restored to airworthy condition (markings SP-EFA).

Variants
PZL-102A
Prototypes
PZL-102B
Production variant with Continental C90 engine.
There is another PZL 102B restored in South Africa, based at Jack Taylor Airfield Krugersdorp, and one more in Brazil (PT-BGP)

Operators

Specifications (PZL-102B)

References

Further reading

External links

Photographs

1950s Polish civil utility aircraft
PZL aircraft
First Street Tunnel. The First Street Tunnel is a two-track, soft-earth tunnel built between 1904 and 1906 by the Washington Terminal Company to serve as the southern approach to Union Station in Washington, D.C. Currently owned by Amtrak, it connects to lower-level tracks and platforms at the station, passes under Capitol Hill and connects to the RF&P Subdivision (CSX Transportation) and Long Bridge, offering through railway service to Alexandria, Virginia, and points west and south.

Unlike the Northeast Corridor tracks north of Union Station, the tunnel tracks are not electrified, so southbound trains leaving Union Station must switch to diesel locomotives before entering the tunnel. Exiting Union Station, the tunnel runs due south under First Street NE and SE before curving to the southwest under a parking lot near the Capitol South Metro station. Its southern portal is just east of South Capitol Street at the intersection of D Street SE and New Jersey Avenue SE.

The tunnel's height is .

See also
Virginia Avenue Tunnel

References

External links 
 Heavy Rail Track and Structures in Washington DC BelowTheCapital.org
 Images of First Street Tunnel Construction (Archive)

Amtrak tunnels
Railroad tunnels in Washington, D.C.
Tunnels completed in 1906
1906 establishments in Washington, D.C.
Fletcher FD-25. The Fletcher FD-25 Defender was a light ground-attack aircraft developed in the United States in the early 1950s.

Design and development
Designed by John Thorp, the Defender was a conventional low-wing cantilever monoplane with fixed tailwheel undercarriage. Provision was made for two machine guns in the wings, plus disposable stores carried on underwing pylons. Construction throughout was all-metal, and the pilot sat under a wide perspex canopy.

Operational history
Three prototypes were built, two single-seaters and a two-seater, but no orders were placed by the US military. In Japan, however, Toyo acquired the rights to the design, and built around a dozen aircraft, selling seven (five single-seater attack versions and two two-seat trainers) to Cambodia, and four to Vietnam. One example (FD-25B JA3051) served with the Royal Thai Police.

Survivors
One example (FD-25B N240D) remains in an airworthy condition today and appeared at the EAA AirVenture Oshkosh airshow in 2010. Two (a single-seater and a two-seater) are on museum display at the Tokyo Metropolitan College of Industrial Technology in Japan.

Related development
The wing design of the Fletcher FU-24 aerial topdressing plane was loosely based on that of the FD-25 Defender. Almost 300 were built under licence in New Zealand from the mid-1950s and used for agricultural and skydiving operations.

Specifications

See also

References
Notes

Bibliography

Bridgeman, Leonard (ed.). Jane's All the World's Aircraft 1955–56. New York: The McGraw-Hill Book Company, Inc. 
Grandolini, Albert. "L'Aviation Royale Khmere: The first 15 years of Cambodian military aviation". Air Enthusiast (Bromley, UK: Fine Scroll) (Thirty-seven, September–December 1988): pp. 39–47. ISSN 0143-5450.
 Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions. 1989. p. 393. .
 World Aircraft Information Files. London: Bright Star Publishing, 1985, pp. File 894 Sheet 25.

External links

 Flivver Plane Totes Guns and Bombs November 1951 Popular Science article on FL-25—rest of article and photos on following page

FD-25
1950s United States attack aircraft
Counter-insurgency aircraft
Single-engined tractor aircraft
Low-wing aircraft
Aircraft first flown in 1953
Aircraft with fixed conventional landing gear
Single-engined piston aircraft
Labyrinth (marble game). Labyrinth is a game of physical skill consisting of a box with a maze on top with holes, and a steel marble. The object of the game is to try to tilt the playfield to guide the marble to the end of the maze, without letting it fall into any of the holes. Some versions of the game feature a suspended maze surface that rotates on two axles, each of which is controlled by a knob. Small handheld versions of the game are sold, with the box being completely closed with a transparent cover on top.

The game was developed by BRIO in Sweden and first released there in 1946. It was introduced to the United States by BRIO around 1950. Similar games are offered in the US by a number of companies, due to it never being properly copyrighted there (according to one such company).

Reception
Games magazine included Labyrinth in their "Top 100 Games of 1980", describing it as "like walking a tightrope without the element of danger".

See also 
Ball-in-a-maze puzzle
List of maze video games

Rotating:
Cameltry
Lazy Raiders

Inside-out 360 degrees:
Rubik's 360
Perplexus

First-person:
Marble Madness
Super Monkey Ball
Marble Blast Gold
Neverball
GooBall

References 

Games of physical skill
Marble games
Physical activity and dexterity toys
Single-player games
Tabletop games
Fast Library for Number Theory. The Fast Library for Number Theory (FLINT) is a C library for number theory applications. The two major areas of functionality currently implemented in FLINT are polynomial arithmetic over the integers and a quadratic sieve. The library is designed to be compiled with the GNU Multi-Precision Library (GMP) and is released under the GNU General Public License. It is developed by William Hart of the University of Kaiserslautern (formerly University of Warwick) and David Harvey of University of New South Wales (formerly Harvard University) to address the speed limitations of the PARI and NTL libraries.

Design Philosophy 
 Asymptotically Fast Algorithms
 Implementations Fast as or Faster than Alternatives
 Written in Pure C
 Reliance on GMP
 Extensively Tested
 Extensively Profiled
 Support for Parallel Computation

Functionality 
 Polynomial Arithmetic over the Integers
 Quadratic Sieve

References

Further reading
 FLINT 1.0.9: Fast Library for Number Theory by William Hart and David Harvey

Computational number theory
Free software programmed in C
Integer factorization algorithms
Numerical software
Luther W. Graef. Luther W. Graef is the founder of Graef, Anhalt, Schloemer and Associates Inc., former President of American Society of Civil Engineers (ASCE) and the fourth president of ASCE Foundation.

Graef graduated from Marquette University in 1952. After he finished his MS in civil engineering from University of Wisconsin–Milwaukee, he and three partners founded the consulting engineering firm of Graef, Anhalt, Schloemer and Associates Inc. Graef also served on the industrial advisory committee of several UW system schools, including the Department of Civil and Environmental Engineering at University of Wisconsin–Madison.

He was awarded the Outstanding Professional Engineer in Private Practice Award, and the Engineer of the Year Award by the Wisconsin Section of the American Society of Professional Engineers in 1976 and in 1983.

References

External links
Bio at ASCE Foundation
Graef at Engineer's Day, University of Wisconsin–Madison College of Engineering
Graef, Anhalt, Schloemer and Associates Inc.

21st-century American engineers
Businesspeople from Milwaukee
Marquette University alumni
University of Wisconsin–Milwaukee alumni
Living people
Year of birth missing (living people)
Fletcher Aviation. Fletcher Aviation Corporation was an aircraft manufacturer founded by three brothers, Wendell, Frank, and Maurice Fletcher, in Pasadena, California, in 1941.

History
The initial aim of the company was to produce a wooden basic trainer aircraft (the FBT-2) that Wendell had designed, but despite brief interest by the Army in the type to use as a target drone, nothing came of this aircraft. After relocating to Rosemead, California, later projects involved a family of related designs, including the FU-24 agricultural aircraft of which 296 were produced in New Zealand with many still operating today.

During the Korean War the company purchased Rosemead Airport from Bob and Jack Heasley. The roughly triangular property is located south of the 10 freeway, although the airport pre-dates the freeway. The property extended from Rosemead Boulevard on the west to the Rio Hondo river basin on the south and east. 

In 1953, the same year the FU-24 debuted, they also produced a prototype amphibious vehicle known as the Fletcher Flair. The vehicle was powered by a 4-cylinder Porsche 356 drivetrain, modified to make it a four-wheel drive. The company hoped to sell the vehicle to the US Army but the vehicle performed poorly in the water and the Army passed.

Purchased by AJ Industries, it changed its name to Flair Aviation in 1960, and produced aircraft fuelling equipment, including drop tanks and hose reels for inflight refuelling. Moved to El Monte, California, its name was changed back to Fletcher and then Sargent Fletcher in 1964 before abandoning aircraft manufacturing in 1966, with rights to the FU-24 going to Pacific Aerospace. Sargent Fletcher was purchased by Cobham plc in 1994.

Motor racing sponsorship 
For the  1954 Carrera Panamericana, Huschke von Hanstein, Press Officer and Racing Director at Porsche, presented Hans Herrmann's Porsche 550 Spyder with a very special decoration with sponsorships that would change, until today, the history of sports sponsorship. Fletcher Aviation was a principal one.

Aircraft

References

Notes

Bibliography

External links
 aerofiles.com

Defunct aircraft manufacturers of the United States
Companies based in Los Angeles County, California
Vehicle manufacturing companies established in 1941
0B. 0B (zero B) or 0-B may refer to:

Science and technology
 Type 0B string theory, a variant of Type 0 string theory
 Binary numeral system (prefix: 0B)
 Zero-based numbering, numbering in which the initial element of a sequence is assigned the index 0
 Zero-based array, an array data type in computer science

Other uses
 Zero-based budgeting, a technique of planning and decision-making which reverses the working process of traditional budgeting
 Blue Air (former IATA code: 0B), a former Romanian low-cost airline
 Turret 0B, a point on Hadrian's Wall associated with Milecastle 0

See also
B0 (disambiguation)
LayerWalker. LayerWalker Technology, Inc. is a fabless integrated circuit design company that announced a network storage system on a chip (SoC). Their products targeted digital home, small business and consumer electronics markets.

LayerWalker introduced in 2007 the miniSAN product that provided ATA over Ethernet (AoE) server functions and management capabilities. Client software and drivers for Windows and Linux operating systems were offered.

LayerWalker had offices in Taipei. It was founded in 2005 and had a web site through 2012.

References

External links
 The ATA-over-Ethernet initiator is part of the mainline Linux kernel since 2.6.11
 Kernel Korner - ATA Over Ethernet: Putting Hard Drives on the LAN
 
 Ben Rockwood: ATA Vs. iSCSI  

Computer storage companies
Storage area networks
Doosan Engineering & Construction. Doosan Engineering & Construction () is a South Korean general construction company. Since its inception in 1960, the company has engaged in the construction of infrastructure facilities, including roads, railroads, bridges, ports, buildings and residential facilities.

History 
In 2006, Doosan Engineering & Construction acquires Mitsui Babcock Energy, the United Kingdom based boiler design and engineering company, for $169.5 million US dollars.

In 2019, Doosan Engineering and Construction is announced to be delisted from the stock market after becoming an affiliate of Doosan Heavy Industries & Construction.

On June 15, 2020, Doosan Engineering and Construction looks to separate from the Doosan Group as it tries to find a buyer. Doosan E&C reported it is spinning off some assets and liabilities to Valuegrowth Corporation and will own 69.5% of Valuegrowth's common stock.

Major activities

Civil works

The Company handles design, implementation, maintenance and repair for all types of civil engineering, including expressways, subways, roads, bridges, industrial and residential complex construction, reclamation, and port construction.

Plant

The company has track records throughout diverse fields of the plant engineering business, including energy, industrial and environmental plants. It has constructed facilities such as low-temperature liquefied gas storage tanks and gas processing plants not only in Korea but also in many parts of the world, most recently the Madagascar ammonia terminal project.

Building works

Brand
Doosan We’ve, Doosan Engineering & Construction's residential apartment brand, was created in 2001.

Business areas
Civil Works
 Road/Highways
 Railways/Subways
 Bridges/Tunnels
 Ports/Reclaim/Water Works and Sewerage
 Privately Funded SOC Business
Architecture
 Work Facilities
 Training/R&D/Production Facilities
 Cultural/Meeting/Physical Fitness Facilities
 Leisure/Hotel/Commercial Facilities
 Public/Medical Facilities
 Electrical Works
 Remodeling
Housing
 Rebuilding
 Redevelopment
 In-house Development
 Housing Developments
 Contracted Projects
Plant
 Environmental Plant
 Hydrocarbon/Energy Plant
 Industrial Plant
CPE (Chemical Process Equipment)
 Tower/Column
 Reactor
 Heat Exchanger
 Pressure Vessel
 Miscellaneous
Steel Bridge
 general bridges
 suspension bridges
 truss bridges
 cable-stayed bridges

References

External links
 Doosan Engineering & Construction English Web Site 

Construction and civil engineering companies of South Korea
Companies listed on the Korea Exchange
Construction and civil engineering companies established in 1960
South Korean companies established in 1960
Flight Dynamics Flightsail VII. The Flight Dynamics Flightsail VII was a recreational aircraft marketed in the United States in the 1970s for homebuilding by Flight Dynamics, Inc., most unusual both in its design and its method of construction. The Flightsail VII was intended to be built in three stages, with each stage representing a flyable aircraft of increasing complexity, capability, and cost. It was hoped that this approach would appeal to homebuilders by minimizing the amount of time and money required to take the aircraft to a point where it could be flown.

The core of the Flightsail VII was a pod-and-boom style fuselage, the pod component of which was in the form of a thick airfoil with integral pontoons at its bottom to aid stability in water. This fuselage could be fitted with flexible, hang-glider-like wings and be flown by having it towed aloft by a speedboat. It could either be left as such and operated in this form (known as a Seasprite) or serve as "Stage I" for the Flightsail VII.

In "Stage II", the builder would add a 90-125 hp powerplant to the aircraft, mounted in a nacelle set on struts above the fuselage pod while retaining the flexible wing. In "Stage III", the flexible wing would be replaced by a conventional, strut-braced monoplane wing mounted high on the fuselage.

Distinguishing FlightSail, Mk I and II from the very different "Seasprite" FlightSail VII 
Thomas H. Purcell, Jr., chief designer of a series of kite-gliders and other aircraft on October 27, 1961, had his maiden flight in a Rogallo wing four-boomed kite hang glider which he called FlightSail, Mk I, based on the Rogallo-Ryan Aeronautical wing in its known simple format. Differently, the "Seasprite" emphasized a large amphibious fuselage. Purcell did not patent the MK I or II, but sold plans around the world. He was granted an approved patent US3614032 regarding the staged-build "Seasprite" type along with variations.

Specifications (Flightsail VII)

See also

References

 
 

1970s United States sport aircraft
Flying boats
Glider aircraft
Homebuilt aircraft
Single-engined tractor aircraft
High-wing aircraft
Flightsail VII
Aircraft first flown in 1970
Toad Data Modeler. Toad Data Modeler is a database design tool allowing users to visually create, maintain, and document new or existing database systems, and to deploy changes to data structures across different platforms. It is used to construct logical and physical data models, compare and synchronize models, generate complex SQL/DDL, create and modify scripts, and reverse and forward engineer databases and data warehouse systems. Toad's data modelling software is used for database design, maintenance and documentation.

Product History 
Toad Data Modeler was previously called "CASE Studio 2" before it was acquired from Charonware by Quest Software in 2006. Quest Software was acquired by Dell on September 28, 2012. On October 31, 2016, Dell finalized the sale of Dell Software to Francisco Partners and Elliott Management, which relaunched on November 1, 2016 as Quest Software.

Features/Usages 
 Multiple database support - Connect multiple databases natively and simultaneously, including Oracle, SAP, MySQL, SQL Server, PostgreSQL, Db2, Ingres, and Microsoft Access.
  Data modelling tool - Create database structures or make changes to existing models automatically and provide documentation on multiple platforms.
 Logical and physical modelling - Build complex logical and physical entity relationship models and reverse, forward, and engineer databases.
 Reporting - Generate detailed reports on existing database structures.
 Model customization - Add logical data to user diagrams to customize user models.
All Toad products typically have 2 releases per year.

Other features
 Model Actions (Compare Models, Convert Model, Merge Models, Generate Change Script)
 Version Control System (Apache Subversion)
 Naming Conventions
 Auto Layout
 Multiple Workspaces
 Scripting and Customization
 Automation
 Object Gallery
 Full Unicode Support
 Integration with Toad for Oracle

Related Software 
Erwin Data Modeler
Oracle
 SAP
 MySQL
 SQL Server
 PostgreSQL
 IBM Db2
 Ingres
 Microsoft Access

See also
 Comparison of data modeling tools
 Relational Model
 Data modeling
 RDBMS

References

External links

Programming tools
Desktop database application development tools
Data modeling tools
2000s software
Oracle database tools
Microsoft database software
Sybase
MySQL