1920s high speed study of the Japanese Type 88 75mm anti-aircraft gun on a self-propelled mount
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- Опубліковано 25 тра 2024
- The Japanese Type 88 75mm anti-aircraft gun was based on an exhaustive evaluation by the Army Technical Bureau of several existing overseas designs, amalgamating some of the best features of the designs studied, particularly the British Vickers QF 3in 20 cwt, into a new, Japanese design. The Type 88's number was designated for the year the gun was accepted, 2588 in the Japanese imperial year calendar, or 1928 in the Gregorian calendar, and it was a considerable step up in performance compared to the Type 11 it replaced.
Tactically employed in battle as a four-gun field battery, Japanese forces used the weapon during the invasion of Manchuria, Soviet-Japanese Border Wars and the Second Sino-Japanese War. Like many similar weapons, they found the Type 88 gun's high velocity rounds were extremely effective anti-tank weapon when fired horizontally. The gun would become the standard Japanese mobile anti-aircraft artillery piece and used against Allied forces more than any other artillery weapon.
During both the Battle of Iwo Jima and the Battle of Okinawa it was used effectively with armor-piercing rounds against US light and medium tanks as well as serving in the coastal defense role. Towards the end of the war many of the Type 88s were withdrawn from front line combat service and sent back to the home islands to help reinforce Japan's homeland defenses against Allied air raids and to prepare for the threat of Allied invasion. It was assigned to civil defense units in major Japanese cities, but its maximum effective vertical range of around 24,000 meant it was unable to reach the USAAF B-29 Superfortress bombers that were raiding the home islands above 30,000 feet.
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This is one of the earliest footage of it. This particular AAA started development in 1925 and it was semi-adapted in 1928.
I found 4 of these on Peleliu. One of which brought down the B24 that was captured on film and used in just about every documentary on WW2 during the 70s-90s
Awesome slow motion footage. Really shows off the breech action well. Interesting dual front tyre set up on the truck for soft ground. Certainly have it solidly pegged to the ground!
also note the hand crank start on the truck. that must've taken two people to turn over.
Looks advanced for 1920
The two posts and frame with the electric wire running to it that the gun is firing between is a ballistic chronograph of the Bashforth Screen type. Wires strung at different distances from the muzzle would be split by the passage of the shell and electrical switches would mark a paper chart with the elapsed time between events. With the time and the known distance between wires you get shell velocity. Older versions (and cruder ones sometimes in modern use by guerilla armories to QC small arms ammo) use projectile weight and a pendulum, or spinning disks on the ends of an axle with known RPM, while modern electronic chronographs use optical sensors or radar.
Good observation. Back in high school I had made an experiment where a projectile would cut two strips of foil, the first one starting and the second one stopping the discharge of a capacitor, and then calculating the time interval by measuring the residual charge,
1920S?!?!? Alright its confirmed this man is a time traveler.
Because he uploaded war footage?
What chassis are they testing it on?
Must have been really expensive to do high speed filming back then. Also, let's bring back those hats.
I always wonder what use for that square frame near the barrel
How do they make the breech block to open after the gun is fired? Same with the Flak 88
There is a cam arrangement, usually under the breech, that engages, (when the gun fires, and recoils), with the breech operating crank, this is the actual part that closes the breech block. This crank is linked to the operating handle, mounted on top of the breech, that the crew use to manually close the breech. You can see the handles on top of the breech, moving, and opening the breech, from 0:16 in the footage. When the gun fires, the recoil, via the cams, etc, forces the breech block to unlock, rotate, and open, ejecting the shell casing as it does.
It's space get out of there dangerous machine