Need help on a mark.

Ed · 25th February 2009, 04:05 PM

Sorry, I should have been more specific.

The picture shows one like mine. In essence, if you know the trajectory of a projectile and charge for a given gun, you can elevate the barrel to have the projectile hit at a certain distance. The thing in the picture sat on a Hotchkiss machine gun, the end of the bubble level was raised so that if it were made level it would be that many degrees off the horizontal.

I picked up a couple of these ... the last one is an illustration from the 1894 Hotchkiss Catalog. I have one just like it.

25th February 2009, 04:05 PM	#3
Ed Member Join Date: Feb 2005 Posts: 259	Sorry, I should have been more specific. The picture shows one like mine. In essence, if you know the trajectory of a projectile and charge for a given gun, you can elevate the barrel to have the projectile hit at a certain distance. The thing in the picture sat on a Hotchkiss machine gun, the end of the bubble level was raised so that if it were made level it would be that many degrees off the horizontal. I picked up a couple of these ... the last one is an illustration from the 1894 Hotchkiss Catalog. I have one just like it. Attached Images