http://www.sjgames.com/gurps/Roleplayer/Roleplayer29/MagSails.html This article was published in a Steve Jackson Games publication, but the math is very accurate for how a Magnetic plasma sail would work  

Plasma Magnet Sails to get manned missions to Mars in 1 week A very interesting article that lays out the nature of the Plasma magnet...

Surface commerce raiding.

Surface commerce raiding. Several German surface raiders, both cruisers and auxiliary ships had spectacular success during the Great War. But these were raiding the shipping of the greatest naval power, who had the units to run the German raiders down. In the end each...

Bow hunting: Tree stand versus Still hunting

Let me start by saying that these are merely my opinions and observations on the differences between these two styles of bow hunting. Over the years I have meet many people that prefer one over the other, and some hunters who find them both merely two useful aspects...