I wonder what a bangometer was? Forgot to take the lens cap off?
Four other members of Project Alberta flew on the Hiroshima mission. Luis Alvarez, Harold Agnew and Lawrence H. Johnston were on the instrument plane The Great Artiste. They dropped “Bangometer” canisters to measure the force of the blast, but this was not used to calculate the yield at the time.[48] Bernard Waldman was the camera operator on the observation aircraft. He was equipped with a special high-speed Fastax movie camera with six seconds of film in order to record the blast. Unfortunately, Waldman forgot to open the camera shutter, and no film was exposed.[49
This is interesting.
Little boy was going to happen regardless of the Trinity test.
Four Little Boy casings were expended in tests? The one dropped on Hiroshima was number 11, You would think there would be one spare? L6 was dropped twice?
The trinity test was a test of a case less Fat Man.
There were five case assemblies for Fat Man. two used in drop test, one broken and two available for use? Note they are not numbered sequentially so there were others that didn’t pass quality testing that did not arrive on Tinian?
The amount of atomic material is not mentioned. Still classified? We are left with the impression that there was only enough on Tinain for two bombs but don’t know how much is in the pipeline.
But at the end of the project on Sept 7, there are 3 Fatman Assemblies F101,F102 and F103 plus the F32. The 100 series indicating some improvements made? and more flown in and available and indicating more plutonium material was available?
Pumpkin bombs dropped on the 14th Japan surrenders on the 15th so we were getting ready for the 3rd drop?
The rest of the Fat Man team prepared the “Gadget”, the case-less Fat Man bomb used for the Trinity nuclear test. Parsons and Warner had decided that the combat use of the Little Boy would proceed regardless of the outcome of the Trinity test.[26]
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Four Little Boy assemblies, L-1, L-2, L-5 and L-6 were expended in test drops. L-6 was used in the Iwo Jima dress rehearsal on 29 July. This was repeated on 31 July, but this time L-6 was test dropped near Tinian by Enola Gay. L-11 was the assembly used for the Hiroshima bomb.[
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The first Fat Man assembly, known as F13, was assembled by 31 July, and expended in a drop test the next day. This was followed by F18 on 4 August, which was dropped the next day.[42] Three sets of Fat Man high explosive pre-assemblies, designated F31, F32, and F33, arrived on a B-29 of the 509th Composite Group and 216th Army Air Forces Base Unit on 2 August. On inspection, the high explosive blocks of F32 were found to be badly cracked and unserviceable. The other two were assembled, with F33 earmarked for a rehearsal and F31 for operational use.[43]
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Project Alberta still had three test assemblies, F101, F102 and F103, but the damaged F32 was unserviceable, so new explosive blocks would have to be flown in from Project Camel. There were also shortages of some components, notably detonator chimneys. These were fabricated on Tinian. Seven B-29s of the 509th Composite Group flew Pumpkin bomb missions on 14 August. Word that Japan had surrendered reached Tinian the following day.[57]