Re: trig scales on the Post Versalog slide rule Message #7 Posted by Eamonn on 8 Sept 2013, 1:05 a.m., in response to message #6 by Eddie W. Shore
Hi Eddie,
The K&E 4080 and 4081 slide rules are basically the same except the 4080 is a Log Log Duplex Trig rule (i.e., the trig scale is in degreesminutes), while the 4081 is a Log Log Duplex DeciTrig rule (i.e., the trig scale is in decimal degrees).
An example of the 4080 scale can be seen here. Check out the T, ST and S scales, which are marked in degrees and minutes. The 4081 equivalent can be seen here, where the same scales are in decimal degrees.
Best Regards,
Eamonn.
