Egon, The problem with considering the Danforth anchor to be a two shovel plow is that it digs in and literally burys itself deeper and deeper to the point that it will either 1. develop so much resistance that yo can't pull it or 2. the soil disturbing actioni is subterranean and not too effective at the soil surface.

The above is when there is not so much surface grass, weed, and or rock such as to prevent it digging in properly in which case it woild also be a poor surface soil mixer especially as compared to any of the German patent anchors of the plow persuasion or the CQR or Bruce.

In fact the Danforth style digs in and holds so well in straight line pull situations that there are variants sold for off roaders to use as light weight but effective "dead men" to give purchase for using a winch for self rescue. I was one of the early proponents of this being as how I was cross fertilized, so to speak, in off roading and sailing. There used to be products commercially available for this as an outgrowth of the early interest. Here is one of the early products still on the market, complete with endorsements from military Hummer drivers.

http://www.pullpal.com/quotes.html

Pat [img]/forums/images/icons/smile.gif[/img]