johnbr

XB-52

B-52 Chronology Many Tradeoffs: Speed, Range, Payload, Weight AAF Long-Range Turbine Bomber Requirements Apr 1945 Specific Requirements 10K lb, 10K mi, 450 mph Nov 1945 T35, T37 Available Boeing 462 Offered (non-swept, 360,000 lb) Feb 1946 With 6 x T35-1, 410 mph Study Contract for Boeing 462 Jun 1946 None for Convair, Martin 464-16,-17 Offered (480,000 lb, 3,750 mi) Dec 1946 4 x T35-3, LeMay Request, 400 mph USAF Give Boeing more $ for 464-17 Study Feb 1947 With T35 Cancellation considered by DOD Early 1947 Fought off by Boeing, LeMay 464-25 Offered Mar 1947 12K lb USAF Issue New Requirements Jun 1947 10K lb, 12K mi, 400 mph 464-29 Offered (400,000 lb) Mild Sweep Aug 1947 10K mi, 455mph USAF Contract for Mock-Up 2 Sep 1947 With T35-3 USAF Issues New Requirements (8k mi,550 mph) Dec 1947 $2.35M Spent to Date USAF Mock-Up Inspection Jan 1948 Cancel Contract/Re-Start Jan 1948 USAF Go-Ahead for 464-35 (300,000 lb) Feb 1948 With T35-5, 500 mph, 8K mi USAF Contract for 2 Prototypes, due 2-51 Mar 1948 $29.4M, Still with T35 USAF Ask for Use of J40 May 1948 Study Boeing Proposed 464-40 with J40 Jul 1948 5.3K mi, 280,000 lb USAF Asks Boeing to Use J57 21 Oct 1948 464-49 Proposed 24 Oct 1948 USAF Contract Mod to Use 8 x J57 26 Jan 1949 330,000 lb, 35° Sweep USAF Mock-Up Inspection 29 Apr 1949 Air Staff Approval 1 Oct 1949 Boeing Proposed Definitive XB-52, 464-67 Nov 1949 390,000 lb, 7K mi, 10K Payload USAF Selects 464-67 as B-52 24 Mar 1950 519 mph Cruise USAF Approves Production of B-52 9 Jan 1951 First Batch = 13 XB-52 Rollout 29 Nov 1951 YB-52 First Flight 15 Apr 1952

XB-52
johnbr, Nov 12, 2012
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  • Category:
    Post-War Aircraft
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    johnbr
    Date:
    Nov 12, 2012
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