This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Military history: Technology / Weaponry / North America / United States / Cold War This article is within the scope of the Military history WikiProject. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. To use this banner, please see the full instructions.Military historyWikipedia:WikiProject Military historyTemplate:WikiProject Military historymilitary history articles This article has been checked against the following criteria for B-class status: Referencing and citation: criterion not met Coverage and accuracy: criterion not met Structure: criterion met Grammar and style: criterion not met Supporting materials: criterion met Associated task forces: /  Military science, technology, and theory task force Weaponry task force North American military history task force United States military history task force Cold War task force (c. 1945 – c. 1989)

In the Travis AFB article at [1], it is mentioned that the conventional explosives in one of these Mark 4's exploded when the plane carrying the bomb crashed. "The plutonium pit was transported on another plane", the article says. Was this due to the IFI feature, and is it possible this prevented a nuclear explosion? 169.237.10.220 ( talk)

I just picked up a book titled Broken Arrow #1 published in Canada where a B-36 carrying a Mark IV crashed. The Mark IV minus the core/pit was dropped and exploded before the plane crashed in North British Columbia. The books mentions 3 core/pit options, the important thing the book mentions which this wikipedia pages lacks the the lack of mention on core levitation as a means in increasing yield. This was probably known only after Chuck passed away. The specific tests of these allow cores and yields were given. And IFI was mentioned. 162.234.1.91 ( talk) 05:06, 3 November 2014 (UTC) reply

Oh, no. Chuck Hanson is all over levitation in his Secret History. It needs to be written in. SkoreKeep ( talk) 03:00, 24 January 2015 (UTC) reply

I gather that the batteries and capacitor firing circuits were redsigned to extend the weapon shelf life. This does not seem to be mentioned in the article. 90.205.123.105 ( talk) 15:33, 30 March 2011 (UTC) reply