Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Rand [Nuclear] Probability
Perrygraf for Rand CorporationUSA
c. 1961Dia. = 15.3 cmMilitary

Notes: 1) A disk slide rule used to calculate the probability of hitting a specific target and the number of bombs needed to guarantee a specific probability. 2) Slide rule has 2 concentric disks and a clear cursor 3) A US Ait Force Project

Image 1

Image 2