Printable Version of Topic
Click here to view this topic in its original format 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.

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:

Posted by: Ferdinand July 24, 2014 06:43 pm
Similar to this one,also explanations, here:


Powered by Invision Power Board (
© Invision Power Services (