Seems like a reasonable test to me. It would cover all conditions and all
possible scenarios, but it would be enough to make a reasonable comparison.

--
"j" ganz @@
www.sailnow.com

"Bob Crantz" wrote in message
. ..

"Capt. Rob" wrote in message
ps.com...
If you give it enough rode the pull is linear. That's why.


You'd need a LOT of rode and it still would never be truly linear, Bob.
Even then it would never cover the shock loading due to long swells
combined with high wind. Did the tugboat back off then charge forward?
The test with a tugboat defines the anchor's abilities to some extent
but does not in anyway equal real world tests in various conditions.
The fact that Jeff found the anchor deficient in real world use means a
lot more than Teddy the Tugboat pulling on a 50-1 rode.

RB
35s5
NY


RB
35s5
NY


50:1 rode, if the rope was straight gives an angle of arcsin .02 = 1.15
degrees. Since the rope is catenary/hyperbolic the angle is less, the
shank lays on the bottom. Rope stretch is usually 10% under full load. 20
feet water depth, 1,000 foot road, 100 foot stretch.

The tugboat test is a good one for testing relative holding power. Testing
with a tugboat under various conditions is good real world testing. The
conditions must be the same for different anchors tested otherwise the
tests could mean very little.

Don't forget the sea bottom plays a role too.

Mushroom anchors work very well with 1:1 rode in mud.