News Letter 1940 Jul-Dec - Air Force Historical Studies Office

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VOL. XXIII A I R COR P S NEWS LET T E R NO. 14. Information Division Air Corps July 15, 1940 Munitions Building Washington, D.C. The ~ef purpose of this publication is to distribute information on aero- !llll1tics to the flying personnel in the Regular Army, Reserve Corps, National Guard, and others connected with aviation. .. '. .. r ---000-":": . . . . ~ CORROSION CONTRdL IN'AIRcBnr srRUCTu'RES :ByJ. Teres, Materiel Division Aside from appearance consider~tions, universallyemp16yed ar~{l) an oil corrosion is very detrimantal. Even film of some type, and t2) paint. :Both. the sli/dltest amount of pitting on a . are effective because they J.n~ate the stresseCl: section may reduce the fatigue metal from the .corroding media (elecstrene;th as much as 50 per cent .. Corro- trolyte) ... The anodized film on aluminsion as electrochemical in nature: When um is enother coating which reduces current is drawn from a dry bat tery, the corrosion because of its insulating zinc container corrodes. A similar ac- PT9perty.. '. . tion occurs if aluminumand copper are. POtassium dichromate sodium chromate, in contact end en electrolyte, such as zinc chromate, water ";aass, and amine salt water, is present. Electricity is soaps are corrosion iDhibitors in generated at the expense of the alumin- aqueous solution. These inhibit cerroumwhich is dissolved. All metals, saon either by reacting with the corhowever, are not similarly affected.For roding media or by formation of inert example, if the copper in the above film on the. surface of metal. .An excase had been cadlillUmpJ,ated, the cur- ample of this is the use of cb:f'Omate rent woUldhave been reduced to a neg- capsules in aircraft.fuel tanks. Zinc ligible amount, the corrosion being chromate primer acts with combined efcorrespondingly reduced. A dissimilar fect of an insulating material and an metal is often placed over a stronger inhibitor. material to protect it. EXamolesof As stated in the first paragraph, this are cadiniumplate over s"teel, plating and claddiDy are used in mini- galvanized zinc on steel, and pure alu- mizingcorrosion. ngeneral there are minumon .the surface of Alclad. two types of metall1c coating. The There are two corrosion types of al- first. tyPe is one in which the outside loys; one in which the constltuents are metal protects by virtue of the fact in solid solution, the other in which . that it is more corrosion-resistant at least someof the constituents are electrochemically .. In this class of in suspension. Exal)Iplesof the first coating, which mechanically protects type are MonelMetal and Brass. These the core, are nickel, copper and chroaCt electrochemicall.Y as thou@:lthey miumplate, and stainless clad steel. were p)ll'e metals. The second have If pores exist or develop, corrosion is crystals of dissimilar colllpOsition in accelerated. in these pores. the alloy and are generally less cor- The second class 01metallic. coating rosion-resistant than alloys of the protects the base metal by virtue of first type. . ... the fact that the surface' material cor- Why do ~e metals, which are not in rodes in -preference to the core. IIi con contact WJ. th other inetals, corrode? 00 ntrastto the above type. pores which: This is a question which naturally. exist in the surface coating do not adcomesto too mind of the reader. Ver:( versely affect its corrosion resistance. pure zinc has been prepared. This sane Representative coatings of this type corrodes slowly in an acid solution are cadliliumand zinc plate on steel and which woUlddissolve ordinarily pure aluminumon Alclad'aluminum alloy. zinc in a matter of minutes. Traces Several examples~of accidental dissiof impurities, scratches, dirt, and milar metal cou:ples have been brought to other discontinuities act as thou@:1the the attention 01" the Materiel Division metals were in contilat';With a dissimi- by the Service. In one case, an iron lar matarial. . waSher had dropped into a fuel tank, Since corrosion formation is a seri- resulting in a' hole being formed in the ous condition, mucheffort has been ex- bottom eXactly the size of the waSher. pended in corrosion prevention. Two InanothE}r case, a brass fitting was types of corrosion prevention almost tContinued on PEJge2) . -1- V-85l4,A,C. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark.
Page 1 and 2: \ ~ , ,.ftUfJl:.Rl r OF ' ~IRCORPS
Page 3 and 4: VOL,.XXIII A I R CORPS NEWS L ET T
Page 5 and 6: .AUTOMATIC RELEASEFORINm'RUMENT FLY
Page 7 and 8: OC,," e., rei,.. -; ae.Ifm \)C~ A N
Page 9 and 10: ,~!!.tb;: l DII!JO'rd f;:!j -ce !)!
Page 11 and 12: ....~ _... ,"tv,-r,~,"- - - . :~~T1
Page 13 and 14: ~1f12~r;iiow being fab~icated for e
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Page 17 and 18: .City, it must be Floresville. At t
Page 19 and 20: ~.fu:xl',sl~.r'" ~o "March Field. C
Page 21 and 22: afl",W GllAIlUATIOll OF cw.sS 4().,
Page 23 and 24: .:.:: .b~;:C': ~~~.,." .e- ~ '_ ...
Page 25: ..,' !... :.~'" ,. VOL. XXllI .JUI"
Page 29 and 30: ,de ,', r FINAL SHORr TERM CLASS GR
Page 31 and 32: EXPAiIDEJn~IVILIAN PILOTTBlININGPRO
Page 33 and 34: l'HOrOGRAPHIC LABORATORY ATMm1EI1.
Page 35 and 36: ACTIVITJ:ESATGLENllALE FtYING SCHOO
Page 37 and 38: TIlEJUNE, 1940, CLlSS Jtr CIVILIANE
Page 39 and 40: Emberson, Olaoning B,.&l~f:- 'lli-~
Page 41 and 42: Kl\NEUVERS. IN THE HAWAIIAN DEPARTM
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Page 47 and 48: ., .~.:G"':j%t~f J:'~~~~~~~~:~ Plea
Page 49 and 50: VOL. XXIII A I R IIlformation Divis
Page 51 and 52: 'i;cf be",-",:, "c' ~ •• KELtY.
Page 53 and 54: CABIN SUPERCHARGING OF :BOEING SI'R
Page 55 and 56: -u", l!R!lNCE FIELDAIRMm FLYTOECUAi
Page 57 and 58: . -s~~a~ivlO of. the 'fli~'lt,' mak
Page 59 and 60: 7.: -I ; i. ,': ;~11. .nFor~t:WOi'd
Page 61 and 62: PJUtl\MA. CAN.AL WNE AIRMEN FLY TO
Page 63 and 64: .. 1 • ~~S~ CRANGES.A!r KELLYFIEL
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Page 73 and 74: VOL XXIII A I R CORPS N E,W S LET T
Page 75 and 76: O";,,,.j' 1.;~-. -.rrlm C1i-~ ."~!'
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• and all are anxious to "" get d
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'ROME' BLACKOUT ,. By the NewsLette
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loose on the flying field and showe
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ACTIVITIES AT CIVILLANEiJllJMmT,ARY
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~UN:9EProBLEM'OF 62ND SWADRONI exam
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Lv 5Q'cadet.~." \ltart tra+ning in
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. Ied.?;f lY .' , the~~. r~.t~!Sat.
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GRAl1JATES OF cr..A.SS4O-n OFADVANC
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~ .• ~OL. XXIII ! SEPTEMBER 1, 19
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VOL. XXIII A I R Ihformation Divisi
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-lv boo 1):30'1, , CIVILIANSCHOOLS
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, . THE: AllGU5T 1940 FLYING CLASS
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CIl':;Cfl%l " ~-:av •:.l.ri". eri
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. . AIRCRAFr RECLAMATION IN NICARAG
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• c..v i;:l'r.rn'3Xil 't- .J l ~
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';;S5' FnIn!, Moore ""Gbheen,. 1lob
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M::lRE'l'ACILITIES. M CURTISS-WRIGH
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'lO .c.ol'IS!~1A Z3v;"' . e[R~~$fkJ
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~tmJ\~iMJt'0t"1!fAND-S~ADRONSTO BE
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Bet.ITA aTt.~." of the ~e. Lieut. C
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,-. VOL. XXIII SEPTEMBER 15, 1940.
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VOL.XXIII A I R Information Divisio
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• 2'1:0"c.d~l),:::!"-"".,"" • i
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"ID. @tfe' of; {fie'oiitstanding se
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training. Besides theory, muchof th
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26thX"~Westover Field,~s. I. NUCLEU
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811 fortunate in this respect and t
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. -' ROSI'EEl OF~ATES - ,CLASS4O-E
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-;L~
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'-.sj,&ikACTIVITIES.NJ! CHANUTE FIE
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A LIFE R1IFl' DEMONSTRATION IN HAWA
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YOLoXXIII A I R InfOrmation Divisio
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-jjYIOQ:'i'~ AWARD fJf!i-. 'It. e O
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EXDDU ..S~IOF;Pl1RSlJITERS FROM. MO
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• ~ ...i • ,'L AIR TRANSl'IJRT
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'~~.AlUZATION AT McCHORD ,FIELD' .
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"m;LY,.Sl'tJI)]Nr THROUGHWITH OVERC
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~i,I;~.il;:-::::_ MEDICAL 'SUPERVIS
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j ~lNYIi0N:!TESTED AS A SUBSTITUTE
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'GRADEs" ,t~i1O~fONSIN GEt-IERA1:'-
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" g~s~~tY$~I~~[will' genercl.ly ope
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et:er: : sa.ITsjni ::::,'"• , NEV
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~i!r~ ...u~~1 I..W~CWl Qi'BlC!llS~.
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who was formerly Director of FlyiJl
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five .c... .'. . ' .A ~.fO[t.!he dC
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VOL. XXIII NO\lEMBER 15. 1940 NO. 2
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'VOL.mil A I R Information DivisiOn
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~ q~."'.e..' l$boratories. A "coldt
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GENEBAL BlWfl' ASSUMES COMiJAND OF
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NOTES or TmlaAlJo..AmO AQ.AI)EMY ,
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per}{otin~ta~ we are taking thi;s..
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NII .:CRASH:BOA!S ARlUrEDt P.AllAl1
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C~~crrIqN PROORESS J!l ~ FIJLD I hi
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o1tSt*.Bl:dlOS'l'1lOJUS A'1 .ua eta
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"£,We~,~te~ot ,Ricks F1.1o., , For
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Page 241 and 242:
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Major General G.H. Bret~r' Air Corp
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istration Build.iM. Th1.'8 will bea
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Conclusions d.raWn froJl. the' find
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O?J'ICERoS JOIN IN A RADIO lIlO&1Xl
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. . Norlon, Eoge_~.~'~ ' ( ~~~: ",(
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~ :BY25THB~SqJ..AIRbN Shop", and ,,
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NEWAIlU'LANESREO~~v:m'A!O/wa;tGB11F
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CQltI!lU(l\t(Il,P1'tOJECTS ,rOlt'TB
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landi..,ngJ d"abbipg into thewindJt
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Class SJ..41...A, Air Corp. Flying
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started) with the time recorded. SE
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'. des1mated Ad.1Utent 'aeneX'itJ,.
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in the near future, sc everybody ho
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~~~~~Jryi~l~~ieth~o~a: ~tl~m- AIRCI
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The War Department announced. under
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ead caref.al::J,y. .'ThlSJshllUld'b
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The endurance record for ~ similar
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mission, due to the time taken .,.d
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they swtmg 1ntothe.1r,strlde. ,Lieu
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,The following interview with Ma.1o
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f I :a.tnU.NITARIANMISSION OF A1IIY
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News Letter 1940 Jul-Dec - Air Force Historical Studies Office

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