Image from page 49 of “Transactions of the Society of Motion Picture Engineers (1921)” (1921)

Image from page 49 of “Transactions of the Society of Motion Picture Engineers (1921)” (1921)

A couple of nice precision engineering solutions images I found:

Image from page 49 of “Transactions of the Society of Motion Picture Engineers (1921)” (1921)

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Identifier: transactionsofso13soci
Title: Transactions of the Society of Motion Image Engineers (1921)
Year: 1921 (1920s)
Authors: Society of Motion Image Engineers
Subjects: motion images
Publisher: Society of Motion Image Engineers
Contributing Library: Library of Congress, MBRS, Moving Image Section
Digitizing Sponsor: Library of Congress, Motion Image, Broadcasting and Recorded Sound Division

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About This Book: Catalog Entry
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Text Appearing Before Image:
nchman and the lack of any encour-agement from a commercial point of view. In 1912 the Bausch &amp Lomb Optical Co. began experimenting,getting secured the services of a very in a position Belgian by the name ofMartin, who had some formulae handed down to him by his father.They succeeded in producing some very creditable glass, considering therule-of-thumb approaches utilised, and the continual worry of exposingcherished and secret formulae. They worked along in this way untilwe went into the war, when they have been provided help from the Geophysi-cal Laboratory of the Carnegie Institution. In 1915 the Bureau of Standards took up the problem in theirlaboratory in Pittsburgh. In two or a lot more years experimentingthey produced some creditable glass, but their greatest contribution to thewar requirements was their operate which developed suitable glass pots. Correct right here credit should be given to Mr. Karl Keuffel of the firmof Keuffel &amp Esser, for generating some extremely good glass, also forsuccessfully producing pots suited to his goal.

Text Appearing After Image:
Fig. 2—The Stirring Machine Mr. Duval of the Hazel-Atlas Glass Co., of Washington, Pa.,functioning in conjunction with the John A. Brashear Co., succeeded inmaking a little amount of optical glass which was used by the lat-ter mentioned organization. In 1915 The Pittsburgh Plate Glass Co., at their Charleroi plant,began some experimenting, hunting to creating both spectacle glassand the other larger grade glass used in lenses of higher precision.With the former they met with considerable achievement but with thelatter they worked along contending with varying vicissitudes and 40 meeting with questionable good results until the members of the Geophys-ical Laboratory took over the management of their plant early in1918. With these guys in charge they made some useable opticalglass, but it was not up to the regular desired since of numerous de-fects, chief amongst which have been the old furnaces, which were notprovided with regenerating chambers and the suitable temperaturecontrol was impossible. This brings us

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Steven F. Udvar-Hazy Center: south hangar panorama, including B-29 Superfortress “Enola Gay”, Grumman F6F-3 Hellcat, amongst other people

Image by Chris Devers
See more images of this, and the Wikipedia write-up.

Details, 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. Although developed to fight in the European theater, the B-29 found 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 very first atomic weapon utilised in combat on Hiroshima, Japan. 3 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 Wonderful Artiste, flew as an observation aircraft on each missions.

Transferred from the United States Air Force.

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


Nation of Origin:
United States of America

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

Polished general aluminum finish

Physical Description:
4-engine heavy bomber with semi-monoqoque fuselage and high-aspect ratio wings. Polished aluminum finish overall, common late-Planet 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 reduced left nose.

• • • • •

See more photos of this, and the Wikipedia article.

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

The Grumman F6F Hellcat was initially conceived as an sophisticated 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 showing great guarantee, but improvement was slowed by issues, such as the crash of the prototype.

The National Air and Space Museum’s F6F-3 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-3 exactly where it sustained harm in a wheels-up landing at NAS Barbers Point, Hawaii. Right after repair, it was assigned to VF-83 exactly where it was employed in a education part until February 21, 1945. After numerous transfers 41834 was converted to an F6F-3K target drone with the installation of sophisticated radio-control equipment. 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, soon soon after the first bomb test. Instrumentation on board and photographic plates taped to the manage stick obtained information on radioactivity. 3 much more manned flights preceded the final unmanned flight on July 25, 1946, which evaluated the initial 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.two flying hours. It was assigned to the National Air Museum on November three, 1948, and remained at Norfolk till 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 due to the fact of the harsh atmosphere and its poor situation the Hellcat was returned to NASM on March 16, 1982. In 1983, it was sent to Grumman Aerospace exactly where a group of volunteers totally restored the aircraft. In 1985, it was shipped back to the Paul E. Garber Preservation, Restoration and Storage Facility in Suitland, Maryland, and place 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.

Grumman Aircraft Engineering Corporation


Nation of Origin:
United States of America

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

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