Document 4JeZKJgq5wXX1wrOwk2pVe38Q

mo AUG ?. 1961 bmmmrob CtsUr B. J. Boat, DH Brochure XB>294& 3-61 nunsi 9- Tour Latter af Hajr 11# 1961 Tha following revleians or aorreatloae aborald be ooasldered when the oubjeot tvoetam are rewritten! RararalMa The rataralbla tbanal oxpanaloa fbr AU6( JH-28, ud JN-3000 IFB obaagsd free 0,5 - 0.6 to 0.65 - 0*79 par cast at 2OTQF. ba Tba ealaea ahoua (0*5 - 0.6 par oaat at 200QF) tor tba new JM-20 mad nav JK-23 ZFB are aatlafaoterjr. Talma datawilawd recently on oaa spaaimn aaoh of aav JH-20 and m JK23 IFB tan 0.54 aad 0.93 par aaat* mpaotlnlfi at 200QT aad ware Identlaal to velma detereined oa B k V K>20 aad >23 XFB. JH>28 TF3. Linear Shrlakaaa The broabnrea are iaoorraat la showing 2.0 par oaat Umar shrinkage at 2B00F. JH-28 ZPB ara taatad at Z75QF. Tba average llmar alvlda^ of tha last thraa annual oa^plaa of JK-2B Z7B was 1.4 par oaat. Therml Oonduotlvltr Tba value far tteraal oaadnotirlty of JK-3000 XF3 at IttXF, man* la IK-29A& la not the asm as that la IB-119&.. lbe noat zaoant valm la 3.30 as ohoua la 2K-219&, Tba thenaal ooadaetlvlty of JK-20 aad JK-23 IFB ara Bo. 43W-169, dated Htj 5, 19a. la Baaaaroh Haport jh-23 sal JK-20 are Tba Umar shrinkage of JH-23 ZFB should ba 0.1 par oaat. Tba strength aad density of J1W23 aad JH-20 IPS la IB.29U are oonalsteat with tba oorraat Flailed Fxeduot Spaoifloatlom. Our data chows that tba density of JH-23 should ba 31 pof| tha density of JM-20 ahoald ba 29 pef, aad tba aodulaa of rupturo of JK-23 should ba 130 pal. However* ZaUesopla paraooml hare auoh aara data oa strength and density. I. J. fast, DH 02 July 31* 1961 Lluht^lght Aggrorstoa Tbo donoltj of both JK-2300 and rant JK-2400 L. U. Aggregates should bo wlwd. Drooboro ZK-294A 1* aot oorreot in ohoulaj a lower rtoaoity for aov JK-2400 aggregate than that of JH-2000 tnngit*. Our ltrltad oauunt of data ladiaates that 32 pof for JH-2000 aod 38 pof for ww JK-2400 aggregate may bo satiafeetory. Tho actual doeoltlaa of thooo aatorialo will overlap booouoo of tha oaall differoaoa; la dooolty of tho JM-29 and JM-23 78 uhloh aro aruohod for aggregate and booonoo of aomal variations la partlolo olao distribution* However* Zolioooplo peroonosl probably bars aoro data oa thlo pa^erVjt Castables tbo hlfhoot working temperatures for 3taodard Flrearete and He. 20 Kxeorete ahouD la IK-115A aro aot ooaolstant with tho velueo atom la BMB& 6-59. Tho --oorvioe toeponature for Standard Flreerota lo 250(7. Vo aro hsrlag difficulty la uslas tho new aggregate la JK-20 Flrearete. Ormoks oa tho ourfaoo develop free 1200? to 2Q0QF aad opoa appreciably above 200QT. Tbo final oo^osltlon ohould bo oultablo for 2200/ ao ohoua la RD-2S&* but it may bo aooeooarr to uoo aa uneoongnloal partlolo olao dlotrlbutloa to achieve thlo objective. Ill oei C. E. Ernst* D(! E. C. Lindstran* DO 0. Cooks* EH R. 2. Boblasoa* Zolioooplo 0. 3. Broun S. . Wools/ (C) /Hot 3. E. Wools/