Does Size Matter? SV Panope tests a 55 lb Mantus M1 anchor

[Tourmaline]

Steve of SV Panope answers the question with another excellent anchor testing video.
He tests a 55 lb Mantus M1 rollbar anchor using his standard procedures and usual substrates
Steve compiles and compares its 'weight normalized' performance with 15 previously tested 45 lb (20 kg) cadre of anchors.
There is a table presenting the normalized results near the end of the video.

Sv Panope YouTube testing video # 137: https://www.youtube.com/watch?v=6hPYrhkv_us

[smj]

I’ve always been under the impression that it’s mainly fluke area that gives holding power, not so much weight. Seems as if the 55lb Mantus has only marginally better holding than the 43lb Mantus, I’m guessing the fluke area is slightly larger on the 55 but the shaft is much heavier and beefier?

[dmmbruce]

If you look at the large number of posts on here you will find all sorts of opinions on this, some learned, and some less so. I came down to a reasonable weight as recommended by the manufacturer, plus a lot of chain. It has worked for me. I've sold the boat now so I can't do any more experiments.

As for whether it is fluke area, fluke angle or weight, I feel sure it must be a mixture. A heavy stone works pretty well for a lot of people.

One thing I feel sure of is that a good strong shank is important. If your anchor is well dug in and the tide changes, you want the anchor to swivel and not just have the shank bend. I have seen a few horribly bent shanks.

It sounds as though your 55lb Mantus may have a good point there.

Mike