Monthly Archives: September 2015

Millesimal fineness – prototype circuit boards – China printed circuit assemblies

Millesimal fineness – prototype circuit boards – China printed circuit assemblies

Millesimal fineness is a system of denoting the purity of platinum, gold and silver alloys by components per thousand of pure metal by mass in the alloy. For example, an alloy containing 75% gold is denoted as “750”. Many European nations use the percentage hallmark stamps (i.e. ‘585’, ‘750’, and so on) rather than ’14K’, ’18K’, and so forth., which is employed in the United States.

It is an extension of the older carat (karat in North American spelling) method of denoting the purity of gold by fractions of 24, such as “18 carat” for an alloy with 75% (18 components per 24) pure gold by mass.

The millesimal fineness is usually rounded to a three figure number, specifically where used as a hallmark, and the fineness may vary slightly from the standard versions of purity.

The most typical millesimal finenesses utilised for precious metals:

999 (also recognized as 3 nines fine)

995 (what most dealer would get your platinum at if it is one hundred% pure)

950 (the most widespread purity for platinum jewellery)

900 (also recognized as one particular nine fine)

999.99 (The purest sort of Gold in the marketplace)

999 (Fine gold equivalent to 24 carat, also identified as three nines fine)

990 also recognized as two nines fine

916 (equivalent to 22 carat)

833 (equivalent to 20 carat)

750 (equivalent to 18 carat)

625 (equivalent to 15 carat)

585 (equivalent to 14 carat)

417 (equivalent to 10 carat)

375 (equivalent to 9 carat)

333 (equivalent to eight carat minimum standard for gold in Germany soon after 1884)

999.9 (Ultra-fine silver utilized by Royal Canadian Mint in the Canadian Silver Maple Leaf)

999 (Fine silver utilized in bullion bars, also known as 3 nines fine)

980 (widespread common used in Mexico ca.1930 – 1945)

958 (equivalent to Britannia silver)

950 (equivalent to “French 1st Common”)

925 (equivalent to Sterling silver)

900 (equivalent to “Coin silver” in the USA, also recognized as 1 nine fine)

875 (could be located in former USSR and in Switzerland)

833 (widespread standard utilized in continental silver especially among the Dutch, Swedish, and Germans)

830 (widespread standard utilized in older Scandinavian silver)

835 (a regular predominantly utilised in Germany following 1884)

800 (minimum regular for silver in Germany soon after 1884 Egyptian silver Canadian silver circulating coinage)

750 (uncommon silver common located in older German, Swiss and Austro-Hungarian silver)

Gold as an investment

Silver as an investment

Anklet Belt buckle Belly chain Bracelet Brooch Chatelaine Crown Cufflink Earring lapel pin Necklace Pendant Ring Tiara Tie clip Watch (pocket)

Bench jeweler Goldsmith Jewelry designer Lapidary Watchmaker

Casting (centrifugal, lost-wax, vacuum) Enameling Engraving Filigree Metal clay Plating Polishing Repouss and chasing Soldering Stonesetting Wire wrapping

Draw plate File Hammer Mandrel Pliers

Gold Palladium Platinum Rhodium Silver

Britannia silver Colored gold Crown gold Electrum Platinum sterling Shakudo Shibuichi Sterling silver Tumbaga

Brass Bronze Copper Kuromido Pewter Stainless steel Titanium

Aventurine Agate Alexandrite Amethyst Aquamarine Carnelian Citrine Diamond Emerald Garnet Jade Jasper Malachite Lapis lazuli Moonstone Obsidian Onyx Opal Peridot Quartz Ruby Sapphire Sodalite Sunstone Tanzanite Tiger’s Eye Topaz Tourmaline

Amber Copal Coral Jet Pearl Abalone

Carat (unit) Carat (purity) Locating Millesimal fineness

Connected topics: Body piercing Style Gemology Metalworking Wearable art

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(Post from China rapid prototyping manufacturer blog)

Additive Manufacturing – Precision In A Prototype

Additive Manufacturing – Precision In A Prototype
Back in the day, generating a model or prototype necessary you to start with a chunk of some raw material such as clay, wood, or metal, and to steadily chip away at it until it formed the prototype of your style. This is typically identified as subtractive manufacturing, given that it includes subtracting from the original material to produce your prototype or solution. Additive manufacturing takes a diverse approach – the opposite strategy, in fact. Rather of subtracting layers of supplies, it gradually adds layers where they are required in order to type the prototype. This method is particularly valuable when it comes to metal prototyping.

Additive manufacturing is specifically helpful in the region of metal prototyping for a variety of factors. One of the most distinctive properties of metal is that it is hard. This indicates that a metal prototype will be sturdy and can even be employed in production. But since metal is so difficult, it can also be difficult to reduce into with accuracy to form a model by subtractive manufacturing. In truth, it can be extremely challenging to create an precise model or prototype by this method. It comes with a lot of challenges, and that is why it is hardly ever employed anymore.

By sintering thin layers of powdered metal to one one more, you can steadily add to your prototype until you have a completed model. Additive manufacturing tends to make it much simpler to type metal prototypes with precision. Rather of chipping away at hardened metal, attempting not to do any a lot more harm than essential, metal sintering permits you to bond with each other powdered metal 1 layer at a time. Each layer is only twenty microns thick, so you can attain unparalleled levels of detail in your metal prototyping by making use of this technique. Creating a metal prototype has by no means been less complicated or far more accurate.

It is crucial for metal prototyping to be as accurate as feasible. These metal prototypes are typically utilized as parts in machines, and if they are not built precisely to specifications, they can result in damage to essential machinery. Additive manufacturing permits you to create precise prototypes with no having to manufacture them in bulk before you are sure that the design is just appropriate for what you require. Becoming capable to create a precise metal prototype that you can actually use implies that you will be in a position to attain a style conclusion significantly quicker than you would have been in a position to if you had used less accurate prototypes.

Check out http://www.directedMFG.com for much more data concerning why this business is one of the prime additive manufacturing companies in the planet. As a single of the premier metal prototyping companies, DirectedMFG continues to give its clients with goods and solutions that meet and exceed expectations. Speak to DirectedMFG these days by calling 714-546-1113.

(Post from China rapid prototyping manufacturer blog)

Significance of Prototyping Services

Importance of Prototyping Services

Product design and improvement is the term that encompasses the development, designing and manufacturing of the solution. The methodologies have changed but the objective is nevertheless the same. The modify of methods has created this field a lot far more reliable and sturdy. For the duration of the emerging days of this market the item designing was carried out via hand created drawing and the prototypes that were generated lacked accuracy.

Even even though they lack accuracy and reliability, the product designing services were really costly and only massive players in the marketplace had been able to avail this service. But with the establishing technology the accuracy and reliability of the generated prototype has enhanced and the expense of availing the service also becomes cheaper. Thus, the new technologies for item prototyping led to the a lot more trustworthy and precise services and at a quite reasonable value.

One of the main benchmarks in the field of Solution Prototyping was the introduction of Rapid Prototyping tools such as Autodesk. The Autodesk computer software helped the designers to generate a digital prototype of the item and test the generated prototype as well. With the improved version of this computer software it even inherits the feature to produce the 3D prototype of the item defining the measurements and functions of each and every portion.

Then with the establishing era of Solution Designing Solutions there came one more main achievement of 3D printing Prototyping. With the aid of this technology the solution can be visualized like a reside solution. The generated prototypes of the product have the identical appear and feel as that of the original item. The 3D Model Printer is utilized to produce the models for the solution making use of the model printers. The item design and style and improvement industries all over the globe have adapted these latest prototyping solutions and those who are still stuck to the old methods are facing a excellent reduction in their clientele.

Unlike the earlier prototyping strategy, these Speedy Prototyping techniques have created the operate less difficult for solution improvement. When handmade designs have been utilised, accuracy element was significantly missing in numerous of the prototypes as a result of which the improvement team used to perform upon the accuracy and they have to work for each building the item as effectively as to eradicate the errors.

These newest prototyping techniques have created it simpler for designers to inherit accuracy in the generated prototype as properly as they can test the prototype also which increases the level of accuracy and make the solution prototype very dependable for designers, client and development team.

WB Engineering was established in fall 2007, since then has been growing year soon after year by growing its capabilities and client base. Our employees involves engineers with varying backgrounds, including Biomedical, Mechanical and Electrical Engineering. With in property capabilities for digital and speedy prototyping making use of the newest and most sought following technology

Locate A lot more Rapid Prototyping Service China Articles

(Post from China rapid prototyping manufacturer blog)

Good China Prototype Organization images

A couple of good china prototype business pictures I located:

Steven F. Udvar-Hazy Center: south hangar panorama, such as B-29 Superfortress “Enola Gay”, Grumman F6F-3 Hellcat, amongst other folks
china prototype company
Image by Chris Devers
See more photographs of this, and the Wikipedia write-up.

Information, quoting from Smithsonian National Air and Space Museum: Steven F. Udvar-Hazy | Boeing B-29 Superfortress &quotEnola Gay&quot:

Boeing’s B-29 Superfortress was the most sophisticated propeller-driven bomber of Planet War II and the 1st bomber to property its crew in pressurized compartments. Despite the fact that developed to fight in the European theater, the B-29 identified its niche on the other side of the globe. In the Pacific, B-29s delivered a assortment of aerial weapons: traditional bombs, incendiary bombs, mines, and two nuclear weapons.

On August six, 1945, this Martin-constructed B-29-45-MO dropped the 1st atomic weapon employed in combat on Hiroshima, Japan. Three days later, Bockscar (on show at the U.S. Air Force Museum close to Dayton, Ohio) dropped a second atomic bomb on Nagasaki, Japan. Enola Gay flew as the advance weather reconnaissance aircraft that day. A third B-29, The Excellent Artiste, flew as an observation aircraft on both missions.

Transferred from the United States Air Force.

Manufacturer:
Boeing Aircraft Co.
Martin Co., Omaha, Nebr.

Date:
1945

Nation of Origin:
United States of America

Dimensions:
All round: 900 x 3020cm, 32580kg, 4300cm (29ft 6 5/16in. x 99ft 1in., 71825.9lb., 141ft 15/16in.)

Materials:
Polished general aluminum finish

Physical Description:
4-engine heavy bomber with semi-monoqoque fuselage and higher-aspect ratio wings. Polished aluminum finish general, regular late-Globe War II Army Air Forces insignia on wings and aft fuselage and serial number on vertical fin 509th Composite Group markings painted in black &quotEnola Gay&quot in black, block letters on reduce left nose.

• • • • •

See a lot more photos of this, and the Wikipedia article.

Information, quoting from Smithsonian National Air and Space Museum: Steven F. Udvar-Hazy | Grumman F6F-3 Hellcat:

The Grumman F6F Hellcat was initially conceived as an sophisticated version of the U.S. Navy’s then existing front-line fighter, the F4F Wildcat (see NASM collection). The Wildcat’s intended replacement, the Vought F4U Corsair (see NASM collection), 1st flown in 1940, was showing wonderful promise, but development was slowed by troubles, including the crash of the prototype.

The National Air and Space Museum’s F6F-three Hellcat, BuNo. 41834, was built at Grumman’s Bethpage, New York, factory in February 1944 below contract NOA-(S)846. It was delivered to the Navy on February 7, and arrived in San Diego, California, on the 18th. It was assigned to Fighter Squadron 15 (VF-15) on USS Hornet (CV12) bound for Hawaii. On arrival, it was assigned to VF-three where it sustained harm in a wheels-up landing at NAS Barbers Point, Hawaii. Following repair, it was assigned to VF-83 where it was utilised in a instruction function till February 21, 1945. After numerous transfers 41834 was converted to an F6F-3K target drone with the installation of sophisticated radio-manage gear. It was painted red with a pink tail that carried the number 14. Its mission was to be employed in Operation Crossroads – the atomic bomb tests at Bikini Atoll. It flew on June 24, 1946, with a pilot, on a practice flight and was launched, unmanned, quickly after the 1st bomb test. Instrumentation on board and photographic plates taped to the handle stick obtained information on radioactivity. Three much more manned flights preceded the final unmanned flight on July 25, 1946, which evaluated the very first underwater explosion. Records indicate that exposure of this aircraft to the radioactive cloud was minimal and residual radiation is negligible.

F6F-3K 41834 was transferred to NAS Norfolk and logged its final flight on March 25, 1947, with a total of 430.2 flying hours. It was assigned to the National Air Museum on November three, 1948, and remained at Norfolk until October 4, 1960, when it was moved by barge to Washington and placed in storage. In 1976 this Hellcat was loaned to the USS Yorktown Museum at Charleston, South Carolina. A superficial restoration was performed at the museum, but because of the harsh environment and its poor condition the Hellcat was returned to NASM on March 16, 1982. In 1983, it was sent to Grumman Aerospace where a group of volunteers entirely restored the aircraft. In 1985, it was shipped back to the Paul E. Garber Preservation, Restoration and Storage Facility in Suitland, Maryland, and put in storage. NASM’s F6F-3 Hellcat is scheduled to be displayed in the new Steven F. Udvar-Hazy center at Dulles International Airport in Virginia in 2004.

Transferred from the United States Navy.

Manufacturer:
Grumman Aircraft Engineering Corporation

Date:
1943

Country of Origin:
United States of America

Dimensions:
Overall: 338 x 1021cm, 4092kg, 1304cm (11ft 1 1/16in. x 33ft 5 15/16in., 9021.2lb., 42ft 9 3/8in.)

Physical Description:
Heavy armor plate, reinforced empennage, R-2800-10W engine, spring tabs on the ailerons (increased maneuverability), could carry rockets as well as bombs.

(Post from China rapid prototyping manufacturer blog)

Cool China Prototype Company pictures

A handful of good china prototype company pictures I located:

Steven F. Udvar-Hazy Center: Boeing B-29 Superfortress “Enola Gay” (front starboard view), with Grumman F6F-three Hellcat at back-proper, among other folks
china prototype company
Image by Chris Devers
See more pictures of this, and the Wikipedia report.

Particulars, quoting from Smithsonian National Air and Space Museum: Steven F. Udvar-Hazy | Boeing B-29 Superfortress &quotEnola Gay&quot:

Boeing’s B-29 Superfortress was the most sophisticated propeller-driven bomber of World War II and the 1st bomber to home its crew in pressurized compartments. Though made to fight in the European theater, the B-29 discovered its niche on the other side of the globe. In the Pacific, B-29s delivered a variety of aerial weapons: traditional bombs, incendiary bombs, mines, and two nuclear weapons.

On August six, 1945, this Martin-constructed B-29-45-MO dropped the 1st atomic weapon utilized in combat on Hiroshima, Japan. Three days later, Bockscar (on display at the U.S. Air Force Museum near Dayton, Ohio) dropped a second atomic bomb on Nagasaki, Japan. Enola Gay flew as the advance climate reconnaissance aircraft that day. A third B-29, The Great Artiste, flew as an observation aircraft on both missions.

Transferred from the United States Air Force.

Manufacturer:
Boeing Aircraft Co.
Martin Co., Omaha, Nebr.

Date:
1945

Country of Origin:
United States of America

Dimensions:
General: 900 x 3020cm, 32580kg, 4300cm (29ft six five/16in. x 99ft 1in., 71825.9lb., 141ft 15/16in.)

Supplies:
Polished general aluminum finish

Physical Description:
Four-engine heavy bomber with semi-monoqoque fuselage and high-aspect ratio wings. Polished aluminum finish general, normal late-Globe War II Army Air Forces insignia on wings and aft fuselage and serial quantity on vertical fin 509th Composite Group markings painted in black &quotEnola Gay&quot in black, block letters on lower left nose.

• • • • •

Quoting Smithsonian National Air and Space Museum | Grumman F6F-3 Hellcat:

The Grumman F6F Hellcat was originally conceived as an advanced version of the U.S. Navy’s then present front-line fighter, the F4F Wildcat (see NASM collection). The Wildcat’s intended replacement, the Vought F4U Corsair (see NASM collection), first flown in 1940, was displaying excellent promise, but development was slowed by difficulties, such as the crash of the prototype.

The National Air and Space Museum’s F6F-three Hellcat, BuNo. 41834, was built at Grumman’s Bethpage, New York, factory in February 1944 under contract NOA-(S)846. It was delivered to the Navy on February 7, and arrived in San Diego, California, on the 18th. It was assigned to Fighter Squadron 15 (VF-15) on USS Hornet (CV12) bound for Hawaii. On arrival, it was assigned to VF-three exactly where it sustained harm in a wheels-up landing at NAS Barbers Point, Hawaii. After repair, it was assigned to VF-83 where it was used in a coaching role till February 21, 1945. Right after many transfers 41834 was converted to an F6F-3K target drone with the installation of sophisticated radio-handle gear. It was painted red with a pink tail that carried the quantity 14. Its mission was to be utilized in Operation Crossroads – the atomic bomb tests at Bikini Atoll. It flew on June 24, 1946, with a pilot, on a practice flight and was launched, unmanned, soon soon after the initial bomb test. Instrumentation on board and photographic plates taped to the handle stick obtained information on radioactivity. Three much more manned flights preceded the final unmanned flight on July 25, 1946, which evaluated the 1st underwater explosion. Records indicate that exposure of this aircraft to the radioactive cloud was minimal and residual radiation is negligible.

F6F-3K 41834 was transferred to NAS Norfolk and logged its final flight on March 25, 1947, with a total of 430.2 flying hours. It was assigned to the National Air Museum on November 3, 1948, and remained at Norfolk until October 4, 1960, when it was moved by barge to Washington and placed in storage. In 1976 this Hellcat was loaned to the USS Yorktown Museum at Charleston, South Carolina. A superficial restoration was performed at the museum, but simply because of the harsh environment and its poor condition the Hellcat was returned to NASM on March 16, 1982. In 1983, it was sent to Grumman Aerospace where a group of volunteers completely restored the aircraft. In 1985, it was shipped back to the Paul E. Garber Preservation, Restoration and Storage Facility in Suitland, Maryland, and put in storage. NASM’s F6F-3 Hellcat is scheduled to be displayed in the new Steven F. Udvar-Hazy center at Dulles International Airport in Virginia in 2004.

Transferred from the United States Navy.

Manufacturer:
Grumman Aircraft Engineering Corporation

Date:
1943

Nation of Origin:
United States of America

Dimensions:
All round: 338 x 1021cm, 4092kg, 1304cm (11ft 1 1/16in. x 33ft five 15/16in., 9021.2lb., 42ft 9 3/8in.)

Physical Description:
Heavy armor plate, reinforced empennage, R-2800-10W engine, spring tabs on the ailerons (elevated maneuverability), could carry rockets as well as bombs.

Steven F. Udvar-Hazy Center: Yellow Northrop N1M flying wing airplane, in front of Northrop P-61C Black Widow and tail of the Boeing B-29 Superfortress “Enola Gay”, et al
china prototype company
Image by Chris Devers
See a lot more pictures of this, and the Wikipedia article.

Details, quoting from Smithsonian National Air and Space Museum: Steven F. Udvar-Hazy | Northrop N1M:

John K. &quotJack&quot Northrop’s dream of a flying wing became a reality on July 3, 1940, when his N-1M (Northrop Model 1 Mockup) first flew. 1 of the world’s preeminent aircraft designers and creator of the Lockheed Vega and Northrop Alpha, Northrop had experimented with flying wings for over a decade, believing they would have much less drag and higher efficiency than traditional designs. His 1929 flying wing, while effective, had twin tail booms and a standard tail. In the N-1M he developed a correct flying wing.

Built of plywood about a tubular steel frame, the N-1M was powered by two 65-horsepower Lycoming engines, later replaced with two 120-horsepower Franklins. While its flying characteristics had been marginal, the N-1M led to other designs, including the Northrop XB-35 and YB-49 strategic bombers and in the end the B-two stealth bomber.

Transferred from the United States Air Force.

Manufacturer:
Northrop Aircraft Inc.

Date:
1940

Country of Origin:
United States of America

Dimensions:
Wingspan: 11.6 m (38 ft)
Length: five.2 m (17 ft)
Height: 1.5 m (five ft)
Weight, gross: 1,814 kg (four,000 lb)
Top speed: 322 km/h (200 mph)
Engine: two Franklin 6AC264F2, 120 hp
General: 72in. (182.9cm)
Other: 72 x 204 x 456in. (182.9 x 518.two x 1158.2cm)

Supplies:
General: Plywood

Physical Description:
Twin engine flying wing: Wood, painted yellow.

Extended Description:
The N-1M (Northrop Model 1 Mockup) Flying Wing was a natural outgrowth of John K. &quotJack&quot Northrop’s lifelong concern for an aerodynamically clean design and style in which all unnecessary drag caused by protruding engine nacelles, fuselage, and vertical and horizontal tail surfaces would be eliminated. Created in 1939 and 1940, the N-1lM was the 1st pure all-wing airplane to be created in the United States. Its design was the forerunner of the larger all-wing XB-35 and YB-49 bomber! reconnaissance prototypes that Northrop hoped would win Air Force production contracts and eventually change the shape of modern aircraft.

After serving apprenticeships with the Lockheed brothers and Donald Douglas in the early 1920s and designing the hugely productive and revolutionary Lockheed Vega in 1927, Northrop in the late 192Os turned his focus to all-wing aircraft. In 1928, he left the employ of Lockheed and organized the Avion Corporation a year later he developed his initial flying wing, which incorporated such revolutionary features as all-metal, multicellular wing and stressed-skin building. Though the 1929 flying wing was not a correct all-wing design due to the fact it produced use of external manage surfaces and outrigger tail booms, it paved the way for the later N-1 M, which proved the fundamental soundness of Northrop’s thought for an all-wing aircraft. At the time, nevertheless, Northrop did not have the cash to continue building the all-wing thought.

In 1939, Northrop formed his personal aircraft business, Northrop Aircraft, Inc., and as a result was in a position to finance research and development of the N-1M. For help in designing the aircraft, Northrop enlisted the not aerodynamicist Dr. Theodore von Karman, who was at the time Director of the Guggenheim Aeronautical Laboratory at the California Institute Technology, and von Karman’s assistant, Dr. William R. Sears. Walter J. Cerny, Northrop’s assistant design chief, became the general supervisor for the project. To establish the flight characteristics of an all-wing design and style, Northrop Cerny conducted substantial wind tunnel tests or flying wing models. Eventually, the design of the N-1 M benefited from the new low-drag, increase stability NACA airfoils as nicely as enhanced flaps spoilers, and other aerodynamic devices.

Soon after a period of a year, the N-1M, nicknamed the &quotJeep,&quot emerged in July 1940 as a boomerang-shaped flying scale mockup constructed 01 wood and tubular steel with a wingspan of 38 feet a length of 17 feet, and a height of five feet. Pitch and roll manage was accomplished by signifies of elevons on the trailing edge of the wing, which served the function of both elevator and aileron the place of the standard rudder was a split flap device on the wing suggestions these have been initially drooped downward for what was believed to be far better directional stability but later straightened.

Controlled by rudder pedals, the split flaps, or &quotclamshells,&quot could be opened to enhance the angle of glide or decrease airspeed and thus act as air brakes. The center of gravity, wing sweep, arrangement of manage surfaces, and dihedral have been adjustable on the ground. To decrease drag, the aircraft’s two 65-hp Lycoming -145 4-cylinder engines had been buried within the fuselage. These had been later found to be lacking in sufficient power to sustain lift and were replaced by two 120-hp six-cylinder 6AC264F2 air-cooled Franklin engines.

The N-1M produced its 1st test flight on July three, 1940, at Baker Dry Lake, California, with Vance Breese at the controls. Breese’s inaugural flight in the N-1 M was inauspicious. Throughout a higher-speed taxi run, the aircraft hit a rough spot in the dry lake bed, bounced into the air and accidentally became airborne for a couple of hundred yards. In the initial stages of flight testing, Breese reported that the aircraft could fly no higher than five feet off the ground and that flight could only be sustained by maintaining a precise angle of attack. Von Karman was called in and he solved the difficulty by generating adjustments to the trailing edges of the elevons.

When Vance Breese left the N-1 M system to test-fly the North American B-25, Moye Stephens, the Northrop company secretary, took more than testing of the aircraft. By November 1941, following possessing produced some 28 flights, Stephens reported that when attempting to move the N-1M about its vertical axis, the aircraft had a tendency to oscillate in what is referred to as a Dutch roll. That is, the aircraft’s wings alternately rose and fell tracing a circular path in a plane that lies amongst the horizontal and the vertical. Although Stephens was fearful that the oscillations might not be controllable, he discovered that adjustments to the aircraft’s configuration cleared up the dilemma. In Might 1942, Stephens was replaced by John Myers, who served as test pilot on the project for around six months.

Although the exact period of flight testing for the N-1M is difficult to determine due to the fact both Northrop and Army Air Forces records have been lost, we do know that soon after its initial test flight at Baker Dry Lake, the aircraft was flown at Muroc and Rosamond Dry Lake, and at Hawthorne, California, and that late in the testing plan (probably soon after January 1943) it was towed by a C-47 from Muroc to Hawthorne on its final flight with Myers as the pilot.

From its inception, the N-1M was plagued by poor efficiency because it was each overweight and chronically underpowered. In spite of these issues, Northrop convinced General H. H. Hap&quot Arnold that the N-1 M was profitable sufficient to serve as the forerunner of much more advanced flying wing concepts, and the aircraft did type the basis for Northrop’s subsequent improvement of the N-M9 and of the bigger and longer-ranged XB-35 and YB-49 flying wings.

In 1945, Northrop turned the N-1M more than to the Army Air Forces in the hope that it would someday be placed on exhibit. On July 12, 1946, the aircraft was delivered to Freeman Field, Indiana. A little over a month later, the N-1M was provided to the National Air Museum and placed in storage at Park Ridge, Illinois. On Might 1,1949, the aircraft was placed in the Museum’s collection, and a handful of years later moved in packing crates to the Museum’s Preservation, Restoration and Storage Facility in Suitland, Maryland. In 1979, the restoration of the N-1M began, and by early 1983, some four decades after it had made its final flight, the aircraft had been returned to its original situation.

• • • • •

Quoting Smithsonian National Air and Space Museum | Northrop P-61C Black Widow:

The P-61 Black Widow was the initial U.S. aircraft developed to find and destroy enemy aircraft at evening and in negative climate, a feat produced feasible by the use of on-board radar. The prototype 1st flew in 1942. P-61 combat operations started just after D-Day, June 6, 1944, when Black Widows flew deep into German airspace, bombing and strafing trains and road site visitors. Operations in the Pacific began at about the identical time. By the finish of Planet War II, Black Widows had noticed combat in every theater and had destroyed 127 enemy aircraft and 18 German V-1 buzz bombs.

The Museum’s Black Widow, a P-61C-1-NO, was delivered to the Army Air Forces in July 1945. It participated in cold-weather tests, high-altitude drop tests, and in the National Thunderstorm Project, for which the prime turret was removed to make room for thunderstorm monitoring gear.

Transferred from the United States Air Force.

Manufacturer:
Northrop Aircraft Inc.

Date:
1943

Country of Origin:
United States of America

Dimensions:
Overall: 450 x 1500cm, 10637kg, 2000cm (14ft 9 3/16in. x 49ft two 9/16in., 23450.3lb., 65ft 7 three/8in.)

• • • • •

Quoting Smithsonian National Air and Space Museum | Boeing B-29 Superfortress &quotEnola Gay&quot:

Boeing’s B-29 Superfortress was the most sophisticated propeller-driven bomber of Globe War II and the first bomber to property its crew in pressurized compartments. Though developed to fight in the European theater, the B-29 identified its niche on the other side of the globe. In the Pacific, B-29s delivered a variety of aerial weapons: conventional bombs, incendiary bombs, mines, and two nuclear weapons.

On August 6, 1945, this Martin-built B-29-45-MO dropped the 1st atomic weapon used in combat on Hiroshima, Japan. 3 days later, Bockscar (on show at the U.S. Air Force Museum near Dayton, Ohio) dropped a second atomic bomb on Nagasaki, Japan. Enola Gay flew as the advance weather reconnaissance aircraft that day. A third B-29, The Wonderful Artiste, flew as an observation aircraft on both missions.

Transferred from the United States Air Force.

Manufacturer:
Boeing Aircraft Co.
Martin Co., Omaha, Nebr.

Date:
1945

Country of Origin:
United States of America

Dimensions:
General: 900 x 3020cm, 32580kg, 4300cm (29ft six 5/16in. x 99ft 1in., 71825.9lb., 141ft 15/16in.)

Components:
Polished general aluminum finish

Physical Description:
4-engine heavy bomber with semi-monoqoque fuselage and higher-aspect ratio wings. Polished aluminum finish general, standard late-World War II Army Air Forces insignia on wings and aft fuselage and serial quantity on vertical fin 509th Composite Group markings painted in black &quotEnola Gay&quot in black, block letters on decrease left nose.

(Post from China rapid prototyping manufacturer blog)

Why driverless automobiles may possibly by no means come about

Why driverless automobiles may possibly never ever occur
“In one particular well-publicised incident, researchers connected a laptop straight to the controller location network – the system which connects multiple vehicle functions – of a standard automobile, [providing] them complete handle over practically each and every system, as they …
Study more on Telegraph.co.uk

Hipster&#39s Skinny Jeans Are Out And World Patent Advertising&#39s Miller Industrial
&quotThe sector is growing swiftly in Asia whilst declining severely in the United States. Firms in created nations take … These incorporate WPM Study, WPM Patents, WPM Web &amp Apps, WPM Prototyping, WPM Manufacturing, WPM Capital Ventures, WPM Social …
Study far more on GlobeNewswire (press release)

&#39Maker Culture&#39: Why it&#39s a key element for HK startup ecosystem
19 and 20, Maker Space Hong Kong and Cyberport organized the initial China Maker Summit in Hong Kong. The concept of organizing the … “Makers are more from notion to prototype while entrepreneurs are more from prototype to functioning demos and to mass …
Read far more on EJ Insight

(Post from China rapid prototyping manufacturer blog)