Everyone interested in survival will of course become interested in blade design.... It's always good to look back on other research that has taken place. Naturally being inclined to axes but seeing the advantages of knife features - well just look at the Swiss Army Axe. Proper credits are at the bottom of the page.
Too good not to be seen! From "Knives 82".
If you have questions, criticisms, or things to add - email me please.