than mud... though less important to me, since everything works in sand.
Strangely, no real surprises, though it is still impressive what force you can generate with no stretch and some chop. Over the last few weeks...
- I stopped at 500 pounds pulling the 2-pound Guardian solo. It would have taken much more, but what does it matter? Scaled-up that is about 2 tons.
- The Guardian easily rotated 90 degrees to meet the force
every time, so long as the Mantus in the asymmetrical V allowed transition
time. It just carved right around, smooth as anything, defying the conventional wisdom that pivoting fluke anchors can't handle a wind shift. What they do not tolerate so well is a strong shift with no transition.
- We anchored in 10 knots just to get a wind load number. Only about 13 pounds with a supper elastic rode and the surges averaged out. When we made that all Amsteel the peaks went to 115 pounds!!
- We anchored in 4.5 feet, 10:1 scope, in a sustained 17-20 knots with 10 mile fetch for several hours (Mantus + Guardian). Nothing moved, loads peaking at 180 pounds with a 35' climbing rope snubber.
- I then switched to an Amsteel bridle and all chain. Wow! Twisted a shoulder, lost a load cell (it was a cheap one), and recorded loads GREATER than the ABYC values (over 500 pounds). The Mantus moved several feet, as predicted, and the Guardian went deep. While the Mantus came up easily, the Guardian was as difficult to recover as my 35-pound Supreme would be after a 35-knot night using a snubber. Scaled up, this test is equivalent to ~ 7000 pounds on an all-chain rode; a storm load with plenty of surging. I'm going to have to practice this some more. It was fun... in a way, and is certainly an interesting test.
If you click on the picture and look closely, you can see 2 small orange floats marking the 2 x 2-pound anchors set in an asymmetric V. The connecting rode would typically be about 1 boat length, but since this is small scale, it is only 8 feet. Full scale, the chain will break before the anchors give.
And for what it is worth...
- 2 x 9.9 hp high thrust Yamahas in reverse = 260 pounds
- 2 x 9.9 hp high thrust Yamahas in forward = 500 pounds