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| WorldWar2.ro Forum > Bazaar > Military ruler |
| Posted by: dragos July 05, 2014 05:30 pm |
| I have a WW2 military ruler that seems to have some aerial bomb marks on it. Can someone explain what was it use? On one side it is written: "Bomba germana 12 kg", on the other: "Grenada I.A.R. - Barbieri". There are curved gradations from 180 to 350 intersected by straight lines marked 3, 5, 10, 15, 20, 25, 30. http://i.imgur.com/GlNn2e0.jpg |
| Posted by: Hadrian July 10, 2014 09:08 pm |
| It looks to be some kind of slide rule for use in load calculations for interwar romanian aircrafts, maybe SET 7 or so. |
| Posted by: Radub July 14, 2014 09:01 am |
| It may be the ruler from the AMA bomb sight used with the Barbieri bomb carriers. This sight was used on Potez 25 and I.A.R.37/38/39. You can fing more information about the principle here: http://en.wikipedia.org/wiki/Drift_Sight HTH Radu |
| Posted by: Ferdinand July 24, 2014 06:43 pm |
| Similar to this one,also explanations, here: http://sliderulemuseum.com/Military.htm |