ACU-MATH No. 511 (1) Greg's Slide Rules
Front Left

Front Right

Back Left

Back Right

ACU-MATH No. 511 (1) - Notes

  1. Mannheim type single sided student rule.
  2. At first I thought that this rule had been taken apart at some time and re-assembled with pieces missing but on examination it is very similar to the Acu-Math 1311 which is also constructed in a similar fashion.
  3. The Cursor is strange as well. I can't work out if it came this way or it has been modified. The cursor is the same as the Acu-Math 1311 but it only has one plastic cursor plate. The screw holes have been plugged with metal inserts. It looks like the factory decided that the simplex rule did not need a second plastic face.
  4. This rule appears to be an earlier version of the two other examples I have of the 511. I have added all of these to the collection as they are all different and show the progression of the model. The others are listed here as Acu-Math 511 (2) and Acu-Math 511 (3) (Yellow).


Further details about this Slide Rule:

Model No. 511 - Student Mannheim
Country of Manufacture USA
Scales Front S, K, A [B, CI, C] D, L, T
Scales Back Equivalents tables
Number of Scales 9
Slide Rule Materials Metal core, plastic faces with metal end pieces on back only. Metal core looks like magnesium
Cursor Materials Plastic
Cursor Lines 1 Front
Scale Length 25 cm
Length 31.7 cm
Width 3.9 cm
Condition Fair.
Documentation ACU-MATH No. 511
Accessories Vinyl Case

Last updated: 2002-07-06 12:35 AEST
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