民間防衛>米国動画・音声

M65アトミックキャノン


M65アトミックキャノンは、重量83.3t (砲と台車), 全長26m, 幅4.9m, 高さ3.7m, 乗員5〜7名, 射程30km, 移動速度は最速時速56km, 15分で発射可能, 15分で移動可能という、米軍の核砲弾発射可能な砲である。

1953年のOperation Upshot-Knotholeの10発目Grable実験(15kt)が、このM65の発射実験である。その雄姿は、リストアされた動画Trinity and Beyondで、美しく再現されている。


このM65について、米軍が強調したかったことは、発射の雄姿ではなく、移動の方だった。解説動画では、本体の前後に移動用車両を連結して、道路を走り、カーブを曲がる姿が地味に紹介されている。そして、地面の準備などすることなく、発射体制に入れることを解説している。




インパクトのある兵器なので報道やおっもちゃなども...


また、韓国への核兵器配備の始まりも...



Transcript

00:45
The date was May 1953, The place Nevada.
00:49
And just outside the town of Las Vegas at Nellis Air Force Base, a series of events took place.
00:59
Event, not included in routine airfield operations.
01:03
The 280 millimeter guns were taken off the railroad flat cars, and started on the 65 mile journey to the Atomic Energy Commission's Nevada proving ground, where they will provide the proof of atomic might
01:26
On their way through Las Vegas, the big guns experienced no trouble whatsoever in negotiating the city street.
01:33
On the short path to turns, however, where they really proved their method.
01:40
Handled exactly like the biggest, hook and ladder trucks of any fire department, but some thirty feet longer and many tons heavier.
01:48
The gun took every twists and turns in stride
01:52
They are big but flexible
01:58
Once out of Las Vegas, they settle down to long lined north to the proving ground
02:05
During field operations involving the 280 millimeter gun, they travel in batteries such as these.
02:13
A battery consists two guns, three batteries make up a battalion.
02:21
The battalion provides support for field army or separate core action
02:27
There are, with each battery, 9 support vehicles acting as prime supports for gun personnel, supplies and ammunition
02:37
In convoy, on hardtopped highways, the gun can travel 30 miles /hour.
02:43
And inspite of load weight of 76 tons, can use the standard army bridges wherever necessary
02:51
70 miles north of Las Vegas, was the turn off toward firings site
02:57
In 1944 when the original design specifications were drawn up, the gun was thought to be 240 mm weapon.
03:07
However these specifications were soon changed, the rapidly advancing artillery capability and the foreshadowing of the Atomic Age
03:18
Instead, substituted to the designs for 280mm weapon, with not only HE but atomic firepower
03:31
In 1951, the gun was tested as normal artillery piece at Aberdeen.
03:36
Needless to say these tests were successful.
03:40
All remain was to check out its other capability, the atomic shell.
03:46
Even on secondary roads or rough terrain, the guns retain relatively high mobility, in spite of the fact, their speeds onward to approximately 10 miles per hour.
03:59
the main reason for this mobility are the prime movers connected to the front and the rear of each weapon.
04:06
Each prime mover is capable of 365 horsepower.
04:13
Just one of these cabs has 50 percent more payload than largest Western Highway truck.

04:19
For a heavy weight fighter, the big guns are lights on their toes
04:28
Once at the firing site, the line of fire was given and the guns were directly into their respective emplacement.
04:48
After getting into the position, the rear cab lowers the gun,
04:57
and moves away.
05:04
Then the front cab winches the tube into the battery
05:08
and moves away
05:11
Unlike field operations of World War two, these guns need no extensive ground preparation
05:20
In most cases there is no necessity for excavation of any kind.
05:25
The entire 47 ton weight of gun itself is balanced by a turn-table and three jacks to hair braid specification
05:35
The total time to prepare for firing just 20 minutes.
05:39
after being placed in their firing position, and prior to the filing a mark 9 atomic shell, a series of HE rounds were fired.
05:54
These rounds served the purpose of final check on the many ballistic variables which could affect the accurately in a given situation
06:03
Unlike the standard artillery weapon, which are single recoil meachanism, the 280 millimeter gun has the advantage of double recoil action.
06:14
When fired, tube recoil into the upper carried
06:19
and then upper carriage recoiled.
06:21
Such a system remove the main reason for the lack of ground preparation needed before firing
06;29
folding props are used to load the projectile and the propellant
06:35
During firing operation, ramming can be done both manually and hydraulically
06:45
the gun has a capability of 360-degree traverse and can go to a maximum elevation of 55 degrees
07:01
The time for rehearsal and final checkout is over now and the zero hour approaches.
07:08
The big gun is ready to prove its atomic punch, with the firing of mark 9 shot, as one phase ofoperation upshot-knothole in the nevada desert
07:20
Everything functions with the precision found in any capable well-trained team.
07:26
zero hour is minutes away now
07:29
the projectile was prepared and brought to the gun.
07:54
The final correct setting for time of burst was made.
08:19
the breech closed and the primerinserted
08:25
Once loaded gun's elevation sets with gunners collaborate.
08:41
the sighting is done with a panoramic telescope.
08:52
and the last step, primers are connected, and continuity on timing and firing circurt is completed between the control point and the firing site.
09:03
with everything set now, the gun crew move back to take positons, and slip trenches during firing
09:17
the time is 0830, the date 25 May 1953
09:25
4 3 2 1
09:40
With the degree of accuracy, four times greater than any gun developed before World War two
09:47
the 280 mm gun has proven its worth
09:51
Capable delivering atomic shell some 30 miles under any weather condition, day or night, the big gun provides more accurate and damaging support to ground troops than any other gun in the recorded history warfare.

10:06
Exceedingly powerful but flexible, and with a high degree of mobility the 280 millimeter gun is one of the Army Field forces newest, tactical weapon





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