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> Military ruler
dragos
Posted: July 05, 2014 05:30 pm
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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
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Hadrian
Posted: July 10, 2014 09:08 pm
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It looks to be some kind of slide rule for use in load calculations for interwar romanian aircrafts, maybe SET 7 or so.

This post has been edited by Hadrian on July 10, 2014 09:24 pm
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Radub
Posted: July 14, 2014 09:01 am
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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
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Radu
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Ferdinand
Posted: July 24, 2014 06:43 pm
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Similar to this one,also explanations, here:

http://sliderulemuseum.com/Military.htm

:)
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