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History Via Los Alamos

From B 61 images to a lot else.

It is somewhat unbelievable that these stuff are even in the public domain.

Here are a few samples:

"Adobe was a free fall airburst that was a successful LASL verification test of the XW-50X1-Y2 warhead in a Mk-39 Mod-1 Type 3 drop case. The device was similar to those tested in Aztec, Kingfish, and Bluegill Triple Prime. The W-50 warhead was eventually deployed in three yields: Y1 (60 kt), Y2 (200 kt), and the Y3 (400 kt) and deployed on the Nike Zeus SAM (surface-to-air missile), and the Pershing surface-surface ballistic missile. The mushroom cloud rose to about 60,000 ft.

"This was a generally successful LASL of the the XW-50X1-Y3 in a Mk-39 Mod-1 Type 3 drop case. It was the highest yield variant of the W-50 warhead (used on the Nike Zeus and Pershing missiles), giving a yield-to-weight ratio of 2.21 kt/kg. This device used a spherical secondary stage. The device was similar to those tested in Adobe, Kingfish, and Bluegill Triple Prime. The yield was slightly lower than expected. The mushroom cloud rose to about 60,000 ft.

"Arkansas was a highly successful LRL test of the XW-56X2 (Fife-I) warhead for the Minuteman missile. This warhead was derived from the breakthrough LRL W-47 warhead developed for the Polaris missile. The characteristics of the two warheads are generally similar although the W-56 kept the same general yield (usually given as 1.2 Mt) as the high yield W-47Y2 variant, while trimming 133 pounds of the weight. This test used a Fife secondary stage. This test demonstrated a yield-to-weight ratio 4.00 kt/kg (remarkably close to the effective practical limit of 6 kt/kg for such a light weight device). The test device included a mockup war reserve firing set. This was similar to the devices (also W-56s) fired in Swanee and Bluestone. The mushroom cloud rose to about 60,000 ft.

"Frigate Bird was the only US test of an operational ballistic missile with a live warhead. This test involved firing a Polaris A1 missile from a ballistic missile submarine. The missile was launched by the USS Ethan Allen (SSBN-608) at 13:18 (local) from a position 1500 nm east-northeast of Christmas Island. The re-entry vehicle (RV) and warhead flew 1020 nm downrange toward Christmas Island before re-entering the atmosphere 12.5 minutes later, and detonating in an airburst at 11,000 feet. The system tested was a combination of a Polaris A1 SLBM, and a W-47Y1 warhead in a Mk-1 RV. The Mk-1 RV had a beryllium heat-sink heat shield, and with the 717 lb warhead had a gross weight of 900 lb. The missile/RV demonstrated an accuracy on the order of 2200 yards. This warhead had a yield-to-weight ratio of 1.84 kt/kg, but the higher yield Y2 variant tested in Dominic Harlem doubled the yield and nearly doubled tht YTW ratio to 3.61 kt/kg.

Taken from here.

A Wiki page.


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