Document Details


Title:
SCIENTIFIC DIRECTOR'S REPORT OF ATOMIC WEAPON TESTS AT ENIWETOK, 1951 ANNEX 8.1 - BLAST EFFECTS ON AIRCRAFT IN FLIGHT ( OPERATION GREENHOUSE ) (DELETED)
Author(s):
Subject Terms:
GREENHOUSE OPERATION; DOG-0451 EVENT; EASY-0451 EVENT; GEORGE-0551 EVENT; AIRCRAFT; MEASURING INSTRUMENTS; PHOTOGRAPHS; BLAST EFFECTS; DATA; GRAPHS
Addressee:
UNK
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1985 Sep 01
Declassification Status:
Sanitized
Document Pages:
0188
Accession Number:
NV0051079
Document Number(s):
WT31EX
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE PRIMARY OBJECTIVE OF THIS REPORT IS TO PRESENT DATA CONCERNING THE STRUCTURAL AND AERODYNAMIC LOADS AS MEASURED ON VARIOUS TYPES OF AIRC RAFT, IN FLIGHT, IN THE VICINITY OF AN ATOMIC EXPLOSION. A SECONDARY O BJECTIVE IS TO DESCRIBE THE INSTRUMENTATION ( INSTALLATION, CALIBRATIO N, AND OPERATION ) IN ORDER TO PROVIDE FOR THE FUTURE PLANNING AND CON DUCT OF SIMILAR TESTS. THE DATA PRESENTED HEREIN WERE OBTAINED ON DOG, EASY, AND GEORGE SHOTS OF OPERATION GREENHOUSE. THE AIRPLANES USED TO COLLECT THESE DATA WERE B-17'S, T-33'S, B-50D'S AND ONE XB-47. THESE INSTRUMENTED AIRPLANES WERE ARRAYED AT PREASSIGNED LOCATIONS IN THE AI RSPACE ABOVE THE EXPLOSIONS. A TOTAL OF APPROXIMATELY 250 CHANNELS OF INFORMATION WERE OBTAINED WHICH ESSENTIALLY CONSISTED IN WING BENDING , TORSION, AND SHEAR AT THE ROOT, MID-SPAN, AND OUTER PANEL; HORIZONTA L-STABILIZER BENDING AT THE ROOT; NORMAL ACCELERATIONS AT THE NOSE, C. G., AND TAIL; AERODYNAMIC PRESSURES AT VARIOUS LOCATIONS ON THE AIRPLA NES; AND TEMPERATURES EXPERIENCED BY VARIOUS CRITICAL COMPONENTS OF TH E AIRPLANE. THE POSITIONS OF THE AIRPLANES AT THE TIME OF SHOCK ARRIVA AL WERE ACCURATELY DETERMINED BY MEANS OF RADAR TRACKING. THE MEASURED DATA WERE CORRELATED BY MEANS OF TIME SIGNALS, EVERY SECOND, FROM A L AND-BASED RADIO-TRANSMITTER STATION, AND WITH REFERENCE TO TIME ZERO, BY MEANS OF A PHOTOELECTRIC CELL. THE MAJORITY OF THE DATA ARE PRESENT ED RELATIVE TO LEVEL-FLIGHT CONDITIONS AND TIME ZERO ( T ). THE RECORD ED DATA SHOW THAT THE LOADS PRODUCED BY THE SHOCK WAVE WERE IN GENERAL ACCORD WITH THEORY. THE LOADING EXPERIENCED BY AN AIRPLANE WHILE PASS ING THROUGH THE " PUFF " OF THE ATOMIC CLOUD IS SHOWN TO BE CONSIDERAB LY HIGHER THAN THAT CAUSED BY THE SHOCK WAVE. FOR THIS REASON THE PENE TRATION OF THE PUFF SHOULD BE AVOIDED EVEN BY " SAMPLING " DRONES. THE EFFECTS AND MAGNITUDE OF RADIANT HEATING WERE ORIGINALLY UNDERESTIMAT ED. THIS WAS PROVED BY THE CHARRING OF FABRIC CONTROL SURFACES, THE SC ORCHING OF METAL SURFACES, THE APPARENT THERMAL LOADING OF STRUCTURES, AND THE HIGH TEMPERATURES INDICATED BY THE TEMPERATURE SURVEY. IN VIE W OF THE PRIMARY PURPOSE OF THIS REPORT, NO COMPLETE ANALYSIS WAS ATTE MPTED. HOWEVER, THE DATA ARE BELIEVED TO BE ACCURATE TO WITHIN 10 PER CENT, SUITABLE FOR FURTHER ANALYSIS, AND SATISFACTORY FOR THE DEVELOPM ENT OR CORRECTION OF A TECHNIQUE FOR CALCULATING THE EFFECTS OF ATOMIC EXPLOSIONS ON AIRCRAFT STRUCTURES. THE ORGANIZATION RESPONSIBLE FOR CO LLECTING THESE DATA PROVED TO BE WORKABLE BUT DEFICIENT IN OPERATION A ND AUTHORITY. AS A RESULT OF THESE DEFICIENCIES AND OF THE UNPROVED IN STRUMENTS, MANY OF THE POTENTIALLY AVAILABLE DATA WERE NOT OBTAINED. C HAPTER 8, THEREFORE, CONTAINS RECOMMENDATIONS CONCERNING PERSONNEL REQ UIREMENTS, FACILITIES, AND ORGANIZATIONAL LEVEL FOR GUIDANCE IN PLANNI NG FUTURE TESTS OF THIS NATURE.


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