Operation Upshot-Knothole, Blast Effects on B
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FEBRUARY 19 84 *lJ.s.Go”ar”nen, Prl”,lng OffiQ: 19m-4¶1-133/436s1 ET LEVEL INVENTORY AlRu2AFT lhl FL/G* DOCUMENT IDENTlFICATION I _--___-DISTRIBUTION ST-\ Approved for public r.haW ’ i Duhibutios UnIhited ’ DI3TRIBUTION STATEMENT c >TIC TAB .XVlNOLW3D DTIC t STIFICATION -- DATE ACCESSIONED k-1 1 / Di!Z’RlBUT:ON STAMP DATE RETURSED [ DATE RECEIYED IX DTIC REGKTERED OX CERTIFIED X0. NEVADA PROVING GROUNDS ;c/,.ay ; . -. ia h _._,_--------- WEAPONS PROJECT HEADQUARTERS FIELD COMMAND, ARMED F m II I . : l : -- . /’ . - , ., _ _ . _, _ - _ ‘,.. -. ,..-’ i: ? . b . *, . ‘. 1: Iapuirier relative to this report amy be matisto i Chief, Armed Porcts @e&l Weagow Project i’ W~~JUJ@O~, D. C. _- E[thiereportfsooloageroeed&,nturnto i AEX Technical hformatlon &r&e 0.0. Soa 40s -: . -- QakRldga, Tenneseee : . * 0 0 e WT.750 This document consists of 102 pages No. 183 of 220 coplies, Series A OPERATION UPSHOT-KNOTHOLE Project 5.3 BLAST EFFECTS ON B-36 TYPE AIRCRAFT IN FLIGHT REPORT TO THE TESTDIRECTOR Statement A Approved for public re Distribution unlimited ‘. .:. : hY .I.‘_. I. : . .’ ._::, .,.‘, Glen F. Purkey , . _. ‘._._. 1.‘-.. *. ‘.I. .I.-. :. -.. -: March 1955 *: -..--_. LL_ . .. ::: ‘,;.‘. : _ I_‘. .:-_. _:- . - _- -_. ._. _--_.. ._ - k- .::. -_ sEcrrm 144b. b .QIIC WEhQY UT : .!A ‘::_‘-:; Aircraft Laboratory ::-;.:,.. .._*_._. Wright Air Dt<elopmcnt Center :.*_-.. __ .’ . Dayton, Ohio _.- .‘-I. _-.‘+-.. ABSTRACT ,- : _- _-. “._.‘. ‘..‘.-. -. This report 2’s’ a presentation of the dita obtained by Reject 5.3 .- . : *._._* -* . on the blast responseof a B-360 aircraft flown in the proximityof the :. Shot 9 explosion of Operation UPSHOT-KNOTHCLE.The test aircraft was i.:: ::: . the same &36D aircraft utilized for sisxi.lartesting by Project 6.10 dur- :: .= ing Operation IVY. ‘The Fnstrumsntationwas modified to include addi- :. ._ tionalmeasurtwnts on the horizontal tail. fiesponssmeasurements in- . .-._ cluded: nose, tail, WLng tip, and center of !:ravityaccelerations; wing ‘.. fuselage, and horizontal stabilizer bending moments; and horizontal ,: ..* . stabilizer shear. Peak overpressure at the aircraft was also measured. ._ -.-_-.’ The purpose of the program was to supplement the blast response ( k ._ data obtained during the IVY tests particularly to investigate more fully the aft fuselage and horizontal stabilizer responsecharacteristics. The purpose was accomplished e-penthough the peak loAs obtained were not es hi.=has desq>ed. The peak stabilizer bending moment measured was 3L per ce&oflLmitload. Peak wing bending moments were somewhat higher a of than those measured during NY but were still only fraction the 8:. limit allowable. The data obtained by Project 5.3, combined with previ- ous data, will allow a ccmplete check of the present blast/l.oadtheory : ._:, ,. +he inY. Y.. low ad -+i**m Load ._ ‘_ ..."___.. ranges. Theoretical extre~lation to loads -:. :,_: ‘._. approaching desjgn limit should be confirmed by additional experi..ental ‘. _.. .._ data. The position of the aircraft at blast arrival was such that the i‘ . ‘.I reflected sho-.kSave arrived lr.4,seconds after the direct shock wave; and, because cf fortuitous pfiasinqwith low azr!plitudsvibrations initiated by the direct shock, the peak Itids produced by the reflected shock were slir;htlyhigher. However, iFfthproper phasing and shorter ti.?einterval between shocks, the reflected shock couid induce peak loads considerably higher than those obtained from the direct shock. D*_-.__ The data obtained by Project 6.10 in IVY are included in this report. p:.-.;j _ 2:._- -: ..-.* . *__-*.. a,_. _.-- . , _:- .--_. This report Is one of the reportspresenting the restitsof the . ,=.. -__-- . 78 projectsparticipating in the MilitaryEffects Tests Programof “._. .__-:. OperationUFSHCT-KYOTHOLE, which included11 teats detonations. For ;- : . ;. readersinterested In other pertinenttest information,reference is ,::.-: .- made to XT-782,Summary Report of the TechnicalDirector, Hilitary ,.-- ‘, -. * ~ Effects Program. This summaryreport includesthe followinginformation : __. -. *_. I ‘,. -. of possiblegeneral interest. ::._. --1. -’ *: ; ._ .‘* a. An over-alldescription of each -detonation,including yield, height of burst, ground zero location,time of detonation,amoient atmospheric conditfons at detons- tion, etc., for the IJ shots. , . ‘. ‘. :~:.,:-,_ ; _ * _:: b. Compilationand correlationof all projectresult13 on : ,___..:: _.:,.’ the basic measurewnts of blast and shock,thermal .‘. radiation,and nuclear radiation. L,.- ... C. Compi_lationand correlationof the variousproject . _- ‘_. -_:. res?llt,on kK%yns affectu. -_ ._. ‘:. .-., *__ - ’ :. -__ d. A summary of each project,including objectives ;--. and results. .r._.--_. e. A completelisting of 811 re-rts cwerin;?tne Military Effects Tests Trogram. , ..-. -. i‘c.--.._ - . ._. ‘. -_ . .-. _-.-_ -. a_ _’ ._ ;- l--:.-r -..a 8.. _- -_-_. _-:__- . : - _; ._-- .,. _. .-. :.;.- _- ._. *. __ ‘__. ._ -_ *- :__- . :- _ :- ,. ‘. ,’ *. - ,_ . a-._ -: : ., -. :. ._I’. **_ _.. , w w 0 b ,.._ ..: _.__.. ;_, 1 -. : _ _-:_-. _. _. : . A . -_.__ _ .I . __x_.. _.. .__ A. * .__._._. _.__ __ PREFACE The primary purpose of this report is the presentation of the re- sponse data obtained by Project 5.3 on the exposure of a J3-36D aircraft during Shot 9 of Operation UPSHOT-KNOTHOLE.The work was conducted to provide data to supplement similar measurements made during Operation IR. Because of the direct relation between the work performed on the two operations and the desirability of having the composite data avail- able in a single reference, the results of both IVY and UPSHOT-KMYX’HOLE are presented in this report. All usable response data have been presented as curves of the func- tion versus time. Data relative to method and conditions of exposure are ( included.. Instrumentation details have been omitted, except iwbre non- standard equipment or procedures were employed. Analysis of the data has been limited to that required to establish the coherence of the data. The author tishes to take this opportunity to express h,is appre- ciation to the many individuals and organizations rpho have contributed to the successful completion of this project. Specifically acknowledged in the following paragraphs are a few of the indiv%d.uals and organizations who provided the assiduous effort which is so necessexy to the success af any operation. The untiring efforts of Lt. Francis William, Assistant Project Officer of Project 5.3, in accomplishing seemingly %mpossible assignments in a mi.nMz-c of tti contributed geatlg to the soxxzess of the B-36D participation. kuch credit is due the flight crews who take &he risks invoived in atomic testing, while relying for their safety upon the proficiency of the research engineers. Their cooperation and uiXlZn@ess was most grati- iJing . In particular, the author wishes to express his appreciation for outstanding ccoperation and &xist.ance to Lt. Col. Jerry Hunt, Aircraft Commander; Lt. Cal. Harold Upton, Radar Gperator; -poifP&j. Samual Baker, Flight Engjneer, all of the Strategic Air Command. The portion of this project using the point &ad method was super- vised by Y!. J. C. Lehmkuhl of the Strclctures Bran& Aircraft Laboratory, WADC, Mr. Leh&uhll s interest in the point load met&d rendered possible the measurement of the E&36D horizontal tail loads by this new and corn- pletely independent method. The assistance of the Cook Research Laboratories and the Consoli- dated Vultee Aircraft Car-poration in conducting the point load calibrh :Lon was veatly appreciated. 7 -. .._ _ _ _ _ -.... ..-... _ _.____ _ __ _ - _ . The calculationsmade to select the aircraft positiars wre ac- complished by the Allied Research Associates, Inc. This infomation Is absolutely necessary in a proj@t of this type. This writer is grataful to have the opportunity at this time to express his appreciation to the personnel of the Ditisim of Research of the University of Dayton for their valuable assistance ti the reduction or the test data and the writing of this report. In particular,the personal interest and individual. attention given by Mr. Edward Freeh in : the writing of this report was most gratisying. -.,*. .-_ ;: . _’ : *.: ._‘. :. ::.*. I-__..._: .- : . .’ ,. : :. .,’ : . ,_.-__ g *:, : ._ . ,_‘. *- * .‘. ., ._ ,_ *. .__- i,.-.P ‘I I’. -. --_ .* ‘-5 :.:.:.:-_, * :.-.I.‘. -. _*,- -. : ..‘. _-- :_ :_-_-_ ,. - “_. _.:_- _’ 8 _._. I___._ ._^__-__-- ._.