BPA Eight L-20's were planned to supplement helicopters in providing inter-island logistic support. Ten H-21 or H-19 aircraft, to be utilized for inter-island airlift in the Eniwetok Atoll, were to replace the I-19's which were used dur ing REDWING, Although less suitable in some respects than the H-19, the H-21 was considered the only feasible substitute for the H-19 which was being phased out of use by the Air Force. A temporary requirement for H-21's at Bikini during the build-up period was to be supplied from the total requirement. Two I-21 aircraft were required to alleviate the heavy airlift burden placed upon the eivht L-20's, The L-21's would provide inter-island transportation and also proficiency flying for rated flag and general officers. Sampling would be accomplished by 16 B-57 aircraft, of which six should be B-57D's, Lieutenant Colonel }'. H. Fdwards of Headquarters United States Air Force advised that B-57D's were not available in large numbers, indicating that they probably could not be acquired for HARDTACK, Colonel Massey replied then that if there must be a substitute for the B-57D's, it must be B-57B's because scientific personnel did not feel that Fs84 aircraft had sufficient range and ceiling to fulfill sampling requirements. Furthermore, a large number of sampling tanks designed for B-57's had been fabricated, and fabrication of tanks for other types AFWL/ HQ yo Wry,

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