Tag Archives: alclad

Even More ALC Markings

ALC24ST — ca. 1935.  Alcoa Aluminum advertisement, Aviation, May 1935, pg. 9. (Image also reproduced in Aero Digest article below.)  Link:  http://archive.org/stream/Aviation_Week_1935-04-01#page/n25/mode/1up

ALC24ST — ca. 1936.  Douglas fuselage frame in “Development of Aluminum for Aircraft,” C.F. Nagel, Jr., Aluminum Company of America, Aero Digest, Feb. 1936, pg. 27.  Link: http://archive.org/stream/aerodigest2819unse#page/n148/mode/1up

ALC 24ST — ca. 1936.  “Spot Welding vs. Riveting,” Aviation, Oct. 1936, pg. 29.  Link:  http://archive.org/stream/Aviation_Week_1936-10-01#page/n14/mode/1up

ALC24ST — ca. 1937.  “Thrills of the Navy Test Pilots,” Popular Mechanics, Aug. 1937, pg. 227.  Link: http://archive.org/stream/bub_gb_79oDAAAAMBAJ#page/n123/mode/2up

ALC24ST — ca. 1937.  Alcoa Aluminum advertisement, Aviation, Nov. 1937, pg. 9.  Link: http://archive.org/stream/Aviation_Week_1937-11-01#page/n4/mode/1up

ALC24ST — ca. 1938.  Rear cover, Curtiss Fly Leaf, December 1938.  Link:  http://p40hawksnest.co.nf/Curtiss/CFL/CFL38Dec.html

ALC24ST — ca. 1939.  “Slots Are Here to Stay,” Kurt Rand, Popular Aviation, Oct. 1939.  Link:  http://books.google.com/books?id=NR6fckxHa4UC&pg=PA51#v=onepage

ALC24ST — ca. 1940.  “Are You Qualified?”, Hurd Barrett, Flying Magazine, Oct. 1940. pg. 32.  Link: http://books.google.com/books?id=CJVLeVu8dxMC&lpg=PA1&pg=PA32#v=onepage

ALC24SRT — ca. 1940.  “Assembling of a DC-3 / C-47 aircraft, ca.1940,” California Historical Society Collection.  Link:  http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll65/id/10435

ALC24ST — ca. 1940.  “A man working on fuselage in the factory,”  George Strock/The LIFE Picture Collection/Getty Images.  Link:  http://www.gettyimages.com/license/50452689

ALC24ST — ca. 1941.  “Curtis Wright,” Dmitri Kessel, April 1941.  Link:  http://www.google.com/culturalinstitute/beta/asset/curtis-wright/CQF4HZsxtsB_9Q

ALC24ST — ca. 1941.  “B-17E Flying Fortress Camera Pit Below Radio Compartment.”  Link:  http://www.boeingimages.com/archive/B-17E%20Flying%20Fortress%20Camera%20Pit%20Below%20Radio%20Compartment-2F3XC569VIN.html and http://www.boeingimages.com/archive/B-17E%20Flying%20Fortress%20Camera%20Pit%20Below%20Radio%20Compartment-2F3XC56983J.html

ALC24ST — ca. 1942.  Although other aluminum markings were introduced in the early 1940s, the leading edge of this wing still shows faded “ALC24ST” markings.  Link: http://www.loc.gov/resource/fsa.8b05338/

ALC24ST — unknown [DC-3].  Handbook of Instructions for the Transport Model DC3-277B for American Airlines, Inc., Douglas Aircraft Company, Inc., pgs. 11, 34, 64, 89, 106A, 145.  Link: http://www.avialogs.com/viewer/avialogs-documentviewer.php?id=3248

ALC24ST — unknown [P-36].  P-40 Warhawk in Detail, Part 1: Y1P-36 through P-40C, Bert Kinzey, pg. 26.  Link: http://www.boxartden.com/gallery/var/resizes/Profiles/Detail-&-Scale/61-Curtiss-P-40/

 

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1942 Alclad Marking Documentation: “The Aircraft Apprentice”

Further documentation of ALCLAD aluminum markings was published in the 1942 publication, The Aircraft Apprentice, Leslie MacGregor, Pitman Publishing Corp., 1942 (http://hdl.handle.net/2027/mdp.39015003323030).

From page 100 illustrated below: “It may be noticed that some codes are preceded by the letters ALC which signify that the alloy is covered on both sides with a coating of pure aluminum, and is known as Alclad. This coating prevents corrosion and amounts to approximately 10 per cent of the thickness of the sheet.”

image page100[Click to Enlarge]

1941 Alclad Marking Documentation: “Aircraft Sheet Metal Work”

Written documentation of ALCLAD aluminum markings in 1941 is provided in Aircraft Sheet Metal Work: Bench and Repair Work, H. Edward Boggess, New York, Pitman Publ. Corp., 1941. (http://hdl.handle.net/2027/mdp.39015018277460).

From page 13 included below: “The letters AL or ALC preceding the alloy designation indicate that the material is Alclad, which means that it has been surfaced on both sides with pure aluminum.” And further on the following page, “Thus a piece of metal labeled AL-17ST-ANA would be heat-treated, Alclad dural which conforms to the Army and Navy specifications and comes from the mill at Alcoa, Tenn.”

image1[Click to Enlarge]

image2[Click to Enlarge]

Numerous photographs show the “ANA” mill/plant marking, but this photograph is the only example discovered to date showing the “ANK” mill/plant marking. (Source: National Archives, http://research.archives.gov/description/535581)

ANK-marking[Click to Enlarge]

Aluminum Markings Online

Online photographs showing examples of ALC24ST and ALCLAD markings, primarily dating from the WWII-era:

http://s982.photobucket.com/user/GunnerySgtJackson/media/B24crashsite020.jpg.html?sort=3&o=76
http://www.airforums.com/forums/f381/can-aluminum-skin-be-welded-92625.html
http://colesaircraft.blogspot.com/2012/11/anatomy-of-p-51-mustang-loss.html
http://vanislesecret.blogspot.com/2007/09/historic-64-year-old-dakota-crash-site.html
http://aluminiumidler.blogspot.com/2010/04/endcapitus.html
[repro] http://www.vulturesrowaviation.com/helldiver10_2010.html
[black ink? maybe not alclad] http://746project.wordpress.com/parts/right-wing/right-wing/dsc01995/
http://746project.wordpress.com/parts/right-wing/left-wing/ (http://746project.files.wordpress.com/2012/11/dsc02016.jpg?w=1200&h=&crop=1)
http://www.network54.com/Forum/149674/thread/1266421967/1266668813/HELP+NEEDED-WW2+wreck+parts+identification-B-17–
http://www.questmasters.us/B-24_Page_8.html
http://i.imgur.com/OdDawew.jpg
http://i.imgur.com/kEvPkaN.jpg
http://i.imgur.com/rwZcVZq.jpg
http://www.pacificwrecks.com/douglas/wrecks/mavis/mavis.html
http://www.pacificwrecks.com/aircraft/c-47/43-16261/index.html

http://www.airstream.com/files/library/ba001792c0a731f5.pdf
http://commons.wikimedia.org/wiki/File:B17F_-_Woman_workers_at_the_Douglas_Aircraft_Company_plant,_Long_Beach,_Calif.jpg
http://commons.wikimedia.org/wiki/File:Production_of_B-24_bombers_and_C-87_transports.jpg
https://www.warrelics.eu/forum/battlefield-archaeology/recent-finds-ww2-uk-airfield-7466/
http://www.flickr.com/photos/mikebull/255312057/in/set-72157594303862783
http://www.flickr.com/photos/mikebull/255312128/in/set-72157594303862783
http://www.flickr.com/photos/mikebull/255318615/in/set-72157594303862783/
[russian] http://aviaforum.ru/showthread.php?t=36096
http://s290.photobucket.com/user/Starfire94C/media/Stringer24ST_zpsd72819dc.jpg.html
http://tighar.org/smf/index.php?topic=1048.15
http://forum.keypublishing.com/showthread.php?47463-Liberator-crash-at-Fairy-Lochs-1945
http://www.fold3.com/image/37129850/
http://www.fold3.com/image/32184644/
http://texashistory.unt.edu/ark:/67531/metapth41192/m1/1/sizes/xl/
http://texashistory.unt.edu/ark:/67531/metapth40951/m1/1/sizes/xl/
http://texashistory.unt.edu/ark:/67531/metapth41051/m1/1/sizes/xl/
http://commons.wikimedia.org/wiki/File:Joe_Cobb,_former_%22fat_boy%22_in_the_original_%22Our_Gang%22_comedies,_now_helps_build_B-25_bombers_at_the_Inglewood…_-_NARA_-_195480.jpg
http://commons.wikimedia.org/wiki/File:Workers_assembling_the_bottom_of_an_aircraft_-_NARA_-_196496.jpg
http://images.google.com/hosted/life/9938422523ab8f69.html
http://images.google.com/hosted/life/f95644dfb9490a7f.html
http://www.taphilo.com/history/wwii/usaaf/boeing/B29/h304-1.jpg
http://i0.wp.com/www.retronaut.com/wp-content/uploads/2011/07/830.jpg?resize=599%2C400
[not alclad, some other marking] http://texashistory.unt.edu/ark:/67531/metapth41096/
http://texashistory.unt.edu/ark:/67531/metapth41069/
[tubing] http://texashistory.unt.edu/ark:/67531/metapth40982/
http://texashistory.unt.edu/ark:/67531/metapth40771/m1/1/
http://texashistory.unt.edu/ark:/67531/metapth41041/m1/1/sizes/
http://texashistory.unt.edu/ark:/67531/metapth41064/m1/1/sizes/
http://texashistory.unt.edu/ark:/67531/metapth41226/m1/1/
http://texashistory.unt.edu/ark:/67531/metapth41101/m1/1/
http://www.loc.gov/pictures/resource/fsa.8b05307/
http://www.loc.gov/pictures/resource/fsa.8d36730/
http://www.loc.gov/pictures/item/owi2001038285/PP/
http://www.loc.gov/pictures/item/owi2001039211/PP/
http://www.loc.gov/pictures/resource/fsa.8b07899/
http://www.loc.gov/pictures/item/oem2002006843/PP/
http://www.loc.gov/pictures/resource/fsa.8b07943/
http://www.loc.gov/pictures/item/oem2002006940/PP/
http://www.loc.gov/pictures/item/oem2002006941/PP/
http://www.loc.gov/pictures/item/oem2002006942/PP/
http://www.loc.gov/pictures/resource/fsa.8b07947/
http://www.loc.gov/pictures/resource/fsa.8b09797/
http://www.loc.gov/pictures/resource/fsa.8d34420/
http://www.loc.gov/pictures/resource/fsa.8d34421/
http://www.yorkshire-aircraft.co.uk/aircraft/14oct42.html
http://www.flickr.com/photos/sdasmarchives/4564951590/in/photostream/
http://www.flickr.com/photos/sdasmarchives/4564320277/in/photostream/
[backward] http://www.flickr.com/photos/sdasmarchives/12528364733/
http://www.flickr.com/photos/sdasmarchives/12528723274/
[reynolds] http://www.flickr.com/photos/sdasmarchives/12528714094/
[reynolds] http://www.flickr.com/photos/sdasmarchives/5019025296/

http://www.ilmasotakoulunkilta.fi/IlmaSK/ilmaskmma.nsf/sp?open&cid=Content6685E&screen=blogentryscreen&blogid=Content6685E
http://www.flickr.com/photos/sdasmarchives/12528711784/
http://www.flickr.com/photos/sdasmarchives/12528352113/
http://www.flickr.com/photos/sdasmarchives/12528346613/
http://www.flickr.com/photos/sdasmarchives/12002811563/
http://www.flickr.com/photos/sdasmarchives/10317525683/
http://www.flickr.com/photos/sdasmarchives/10317388326/
http://www.p-35.com/new_page_3.htm
http://warbirdinformationexchange.org/phpBB3/viewtopic.php?p=186428

NEW!

http://babel.hathitrust.org/cgi/pt?id=wu.89090515685;view=1up;seq=87
http://babel.hathitrust.org/cgi/pt?id=wu.89090515685;view=1up;seq=89
http://babel.hathitrust.org/cgi/pt?id=wu.89090515685;view=1up;seq=48
http://babel.hathitrust.org/cgi/pt?id=mdp.39015019904690;view=2up;seq=76
http://babel.hathitrust.org/cgi/pt?id=mdp.39015019904690;view=2up;seq=50
http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/earhart&CISOPTR=529&CISOBOX=1&REC=3 (URI: ark:/34231/c6p26w46)
http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/earhart&CISOPTR=344&CISOBOX=1&REC=3 (URI: ark:/34231/c6n014h4)
http://www.flickr.com/photos/ww2images/6897490685
http://www.boeingimages.com/archive/Douglas%32%34Rosies%34%32Riveting%32a%32Leading%32Edge%32Subassembly-2F3XC5M71AE.html
http://www.boeingimages.com/archive/Woman%32Worker%32at%32North%32American’s%32Kansas%32City%32Assembly%32Facility,%32circa%321943-2F3XC5W5B2I.html
http://www.boeingimages.com/archive/B-17%32Manufacturing%32at%32Douglas%32Long%32Beach%32Plant-2F3XC5WOCNO.html
http://www.boeingimages.com/archive/Boeing%32Factory%32Worker%32Drills%32Rivets-2F3XC5O01CD.html
http://www.boeingimages.com/archive/Boeing%32Employees%32Bucks%32Rivets%32on%32a%32307%32Stratoliner%32Fuselage-2F3XC5O0VOB.html
http://www.boeingimages.com/archive/Outer%32Wing%32Rivetter,%32Douglas%32A-20-2F3XC5MNSFG.html
http://www.boeingimages.com/archive/B-17%32Manufacturing%32at%32Douglas%32Long%32Beach%32Plant-2F3XC5WOCNO.html
http://www.boeingimages.com/archive/B-17E%32Flying%32Fortress%32Camera%32Pit%32Below%32Radio%32Compartment-2F3XC569VIN.html
http://www.boeingimages.com/archive/B-29%32Superfortress%32Wing%32Production,%32Rosie%32the%32Riveter-2F3XC5JZ48N.html
http://www.boeingimages.com/archive/B-17%32Flying%32Fortress%32Construction-2F3XC5BF5S4.html
http://www.boeingimages.com/archive/Woman%32Drilling%32a%32B-17%32Flying%32Fortress%32During%32Assembly-2F3XC5BF86U.html
http://www.boeingimages.com/archive/Women%32Riveting-2F3XC5L7B6H.html
http://www.boeingimages.com/archive/Woman%32Installs%32New%32Waist%32Guns%32on%32B-17%32Flying%32Fortress-2F3XC5BZKMX.html
http://www.boeingimages.com/archive/Boeing%32B-17G%32Navigator’s%32Station-2F3XC5PX3M7.html
http://www.boeingimages.com/archive/Boeing%32Factory%32Worker%32Drills%32Rivets-2F3XC5O01CD.html
http://www.boeingimages.com/archive/B-17E%32Bomb%32Bay%32Looking%32Forward%32Prior%32to%32Equipment%32Installation-2F3XC569YKV.html
http://www.boeingimages.com/archive/B-17E%32OTO%32Compartment%32Floor%32Frames-2F3XC56JCS6.html
http://www.boeingimages.com/archive/B-17E%32Flying%32Fortress%32Circumference%32Stiffener%32Installation-2F3XC569ZRE.html
http://www.boeingimages.com/archive/P-51B%32Mustang%32Gun%32Wing-2F3XC5BEJIP.html
http://www.flickr.com/photos/sdasmarchives/12002881944/sizes/o/
http://www.flickr.com/photos/sdasmarchives/12002811563/in/photostream/
http://www.flickr.com/photos/sdasmarchives/12002811393/in/photostream/
http://www.flickr.com/photos/35963591@N00/4129625694/sizes/o/
http://www.shorpy.com/node/2022?size=_original#caption
http://www.shorpy.com/node/2584?size=_original#caption
http://www.shorpy.com/node/2732?size=_original#caption
http://www.shorpy.com/node/4679?size=_original#caption
http://www.shorpy.com/node/5150?size=_original#caption
http://www.shorpy.com/node/12742?size=_original#caption
http://www.shorpy.com/node/17342?size=_original#caption
http://www.boeingimages.com/archive/B-17E%32OTO%32Compartment%32Floor%32Frames-2F3XC56JCS6.html
http://www.boeingimages.com/archive/B-17E%32Flying%32Fortress%32Camera%32Pit%32Below%32Radio%32Compartment-2F3XC569VIN.html
http://www.boeingimages.com/archive/B-17E%32Flying%32Fortress%32Camera%32Pit%32Below%32Radio%32Compartment-2F3XC56983J.html
http://www.boeingimages.com/archive/B-17E%32Flying%32Fortress%32Circumference%32Stiffener%32Installation-2F3XC569ZRE.html
http://www.boeingimages.com/archive/B-17%32Flying%32Fortress%32Construction-2F3XC5BF5S4.html
http://www.boeingimages.com/archive/Team%32Installs%32a%32B-17%32Flying%32Fortress%32Bomb%32Bay%32Catwalk-2F3XC5BFTW2.html
http://www.boeingimages.com/archive/Woman%32Drilling%32a%32B-17%32Flying%32Fortress%32During%32Assembly-2F3XC5BF86U.html
[1934] http://www.flickr.com/photos/sdasmarchives/14067179107/sizes/o/

//www.nationalmuseum.af.mil/shared/media/photodb/photos/060720-F-1234P-007.jpg

//commons.wikimedia.org/wiki/File:Production_aids-Ruby_Reed_and_Merle_Judd_of_Grumman_Aircraft_Engineering_Corporation._-_NARA_-_535581.tif
//commons.wikimedia.org/wiki/File:Sheet_metal_parts_are_numbered_with_this_pneumatic_numbering_machine_in_North_American%27s_sheet_metal_department,_North_American_Aviation,_Inc,_Inglewood,_Calif.jpg
//commons.wikimedia.org/wiki/File:American_workers_give_up_holiday_to_speed_Victory._The_Blackwelder_family_celebrated_Thanksgiving_at_their_benches_in…_-_NARA_-_196459.jpg

[24ST-PC?] //www.airpages.ru/book/b24d_112.jpg
//www.airpages.ru/book/b24d_110.jpg

[ANA] //legendsintheirowntime.com/Content/1945/B24_Av_4507_DA_attach_p124_W.png
//legendsintheirowntime.com/Content/1945/B24_Av_4507_DA_interior_p125_W.png
//legendsintheirowntime.com/Content/1945/B24_Av_4507_DA_top_p125_W.png

http://images.google.com/hosted/life/94c7c4e4353573bb.html
http://images.google.com/hosted/life/3e6568f724f63abb.html
http://images.google.com/hosted/life/19bd400711a45451.html
http://images.google.com/hosted/life/b33fc263b4122206.html
http://images.google.com/hosted/life/66655f1fdd5eed74.html
http://images.google.com/hosted/life/275058b442716009.html
http://images.google.com/hosted/life/2edf222b42e7fcb4.html
http://images.google.com/hosted/life/4865458c4d8cf50e.html
http://images.google.com/hosted/life/054996cae6a10fb9.html

Stencilling and sheets, not necessarily ALCLAD:
http://www.loc.gov/pictures/resource/fsa.8b00608/
http://www.loc.gov/pictures/resource/fsa.8d07130/
http://www.loc.gov/pictures/resource/fsa.8b05105/
http://www.loc.gov/pictures/resource/fsa.8d42808/
http://www.loc.gov/pictures/resource/fsa.8b06275/

Combination of plate markings and thicker piece markings:
http://babel.hathitrust.org/cgi/pt?id=mdp.39015009844682;q1=alclad%20surface%20scratch;page=root;view=image;size=125;seq=501;num=483

(Credit: Thanks to many other researchers for helping discover these images and links.)