First flight dates:
XP-72, Feb. 2, 1944
XA-41, Feb. 11, 1944
XF8B, Nov. 27, 1944
XF2G, July 15, 1945
Assuming a timely and mostly trouble-free development time of 14 months, only the XP-72 and XA-41 might have seen wartime service, with the former having a combat debut in early April 1945 and...
One possibility not on the above list: the potential of the government's collapse and civil revolt.
Richard Frank mentioned this as one of the possible contributors to surrender. See the following video from the Unauthorized History of the Pacific War Podcast channel on YouTube:
Downfall-Why...
I first saw that video several years ago. It's a great sequence. If you liked that video, you may want to check this one out:
Listen To How The WW2 Corsair Got Its Nickname
The Lincoln prototype first flew on 9 June 1944. Assuming the same timely development as the Lancaster, which took fourteen months from first flight to operational debut, that would put its combat availability sometime in early August 1945, best case scenario.
There was gun camera footage of the shoot down. See the period newsreel report available on the ZenosWarbirds channel on YouTube: Japanese Admiral Yamamoto Shot Down by P-38s! (1943-Restored).
Note that the newsreel does cut in aerial footage from other missions to tell the story, but there...
The following video from the WW2TV YouTube channel might be of interest:
Dead Reckoning - The Death of Yamamoto
It's an interview with author Dick Lehr about his book on the mission.
Yes, holed in the engines — the accounts specifically state the Betty engines being shot. So no holes in the remains of the fuselage should not be surprising. What do the remains of the engines show?
Another file. This one contains the key specifications for air-dropped ordnance of WW2 from various ordnance manuals available at the Bulletpicker website. It primarily covers bombs, but there are some entries for other devices such as depth bombs, depth charges, mines, etc.
There are six...