Thank you, for lending a hand. Also, having you and your tow vehicle on standby, alleviated my concerns of getting stuck.

I actually tried to test an Danforth 18H (that I bought on Craigslist) but it did not set at all. Upon closer examination, the anchor had previously been overloaded and was deformed in such a way that the shank-to-fluke angle is greater than designed. I'll try again with another, unmolested Danforth. Stay tuned.

@@flygoodwin Thanks Steve, Lots of us Danforth guy s trying to decide if we need to upgrade and so far I am not convinced. Thanks again for all your efforts.

I do like facts!

Insulated waders = toasty feet.

That will happen. It first I was concerned that testing at this beach would not be possible in winter due to not having daytime low tides. I have since learned that I can conduct tests at most tide levels as long as the tide is falling. Stay tuned.

Me too!

Good idea about the 'tip - chain attach' angle. Might be something to it.

(I meant to continue but my finger slipped! ) Anyway, I've found a few manufacturers list the fluke areas; Viking 10 at 115 sq.in.; Mantus 17lb. M2 at 102 sq.in.: 20 lb. Vulcan at 113 sq.in. I haven't found area listed by other brands. I do own a Fortress Guardian G-23 (13 lb.) and measured the flute area at 128 sq.in. I also have a 33lb. Claw knockoff and am unsure how to measure the fluke area on it? It seems to me the area engaging the seabed would have a significant influence on load holding once the anchor buried itself in a soft substrate such as sand. Just food for thought!

Yes, I probably should have at least mentioned fluke area. One problem is that I do not know how to measure the convex anchors so that we have an apples to apples comparison to the non convex. Do I measure the "plan view" area, or the actual surface area of the fluke? I could give arguments for either method.

Yes, I believe this to be the dominating figure in overall holding. I feel the danforth is a good example of this. But an anchor has to set for it to hold.

@@flygoodwin That's the problem I ran into with my claw type - how to measure. The anchor brands I listed above have surface areas listed in their specs. For example the Excell. Is the area they list the projected area of the fluke (plan view) or is it area of the metal plate when flat, before it is formed into the finished shape? I don't have any to make a comparison to the numbers listed. Thanks for all your research!

I'll design an anchor when/if I come up with something truly different. Not really interested in "tweaking" a current design. Anchor size is so personal, I really have a hard time making that call. People have different risk tolerances, weight allowances, and boating areas, just to name a few of the variables.

I do not know of any beaches with less density that can also be driven upon. It may be that 'less dense' and 'drivable' are mutually exclusive.

"dragged again due to short chain" Could we also say that the drag was the result of not having an elastic snubber of some sort?

@@flygoodwin The tube keeps removing my replies. For snubber there was a 5 meter of polyester 3 ply rope 1" And, that's right, a good big tire at the rode under water would work. I mostly rely on chain catenary, which is never enough. Lesson: chain should be 100meter It's 340kg for 12mm chain. Like skipNovak has. BTW anchor reset was excellent. Wind changed in opposite directions. It dragged across all Lunenburg harbor and eventually stopped, maybe caught mooring.

Wind rose record shows 110+ kmh on Jan 17 At meteo blue

@@qb6025 Your snubber under those loads would be lucky to extend by 5-10%, which would give it 50cm of maximum extension. Doesnt sound like that would be sufficient for 4 metre waves. Your snubber should be significantly longer, and possibly smaller diameter to be able to access sufficient strain, and provide adequate snubbing.

I believe that "depth of bury" is often more important than the factors that you listed. Also, "throat angle" and other design elements have significant effects on holding power. It would be very difficult for me or anyone else to create a "formula" for predicting anchor performance. Hence my desire to test in as many seabed types and situations possible.