Tsar Bomba weighed 27 tons!? 1400 times combined power of Hiroshima and Nagasaki bombs. Tsar Bomba was ‘detuned’ by half to rein in fallout. Amazing!
http://gizmodo.com/5977824/the-biggest-bomb-in-the-history-of-the-world
The resulting fireball had a radius of nearly 10,000 vertical feet and its 210,000 foot tall mushroom cloud reached into the stratosphere. The light generated by the reaction could be seen from over a 1,000 km and the force of its explosion registered a 5.0 on the Richter scale.The shock wave generated air pressures topping 300 PSI, circled the Earth thrice, and cracked windows 900 km away in Norway and Finland. Buildings in the abandoned town of Severny 55 km away were leveledall of themand upon later inspection, ground zero was reportedly the texture of a skating rink.
Correct. All they needed was to boost the U238 tamper by about 30lbs and it would have been 100MT