the problem with your testing is its not taking scope into considerations and all the pulls are horizontal, testing an anchor with a scope of 3 in comparison to 5 is what is actually required to demonstrate holding power as well as reversing the load 180 degrees so it simulates a tide change . clogging of anchor flukes when forces are applied at 180 degrees( during a tide change ) can break free many poor designed anchors
Pat trick You are quite right that kg is a mass, measure, not a force measure. In this case however, kg is being used as shorthand for the force, N, generated by that mass at the earth' surface. It is a common usage in countries that use SI units but a bit confusing to the rest of us. John Ramsden, P Eng.(ret'd)
Informative video. But I gotta say, guys, what metric system are you using there down-under? Do they teach you guys in the schools of engineering and science that the unit for load, tension, weight and force is kilograms? When I consult the SI Metric system of units I see the fundamental units for weight and force is kilograms - meter per second square and given a special name, Newton. It is not numerically same as kilograms. If you guys gave one of your anchor test loads in a unit of mass (kg) to an engineer and asked him to calculate some reaction forces of something it was pulling on would he or she not first convert that kilograms to a real force or weight? I bet they would so why repurpose the poor unit of mass (kg) into some something that it's both not and technically wrong and enter the modern age of the metric system. I hear arguments that gravity doesn't matter and we can just hand-wave it away. But that is not how the metric system defines weight and force in addition to the problem using kilograms for weight and force in today's analytics.
I just love your anchors. I got sick and tired of our CQR just lying on its side and dragging across the bottom. Have replaced it with a Super Sarca on a 36 foot flybridge gamefishing vessel and couldn't be happier. It sets first time every time!
the problem with your testing is its not taking scope into considerations and all the pulls are horizontal, testing an anchor with a scope of 3 in comparison to 5 is what is actually required to demonstrate holding power as well as reversing the load 180 degrees so it simulates a tide change . clogging of anchor flukes when forces are applied at 180 degrees( during a tide change ) can break free many poor designed anchors
Pat trick
You are quite right that kg is a mass, measure, not a force measure. In this case however, kg is being used as shorthand for the force, N, generated by that mass at the earth' surface. It is a common usage in countries that use SI units but a bit confusing to the rest of us.
John Ramsden, P Eng.(ret'd)
Informative video. But I gotta say, guys, what metric system are you using there down-under? Do they teach you guys in the schools of engineering and science that the unit for load, tension, weight and force is kilograms? When I consult the SI Metric system of units I see the fundamental units for weight and force is kilograms - meter per second square and given a special name, Newton. It is not numerically same as kilograms.
If you guys gave one of your anchor test loads in a unit of mass (kg) to an engineer and asked him to calculate some reaction forces of something it was pulling on would he or she not first convert that kilograms to a real force or weight? I bet they would so why repurpose the poor unit of mass (kg) into some something that it's both not and technically wrong and enter the modern age of the metric system. I hear arguments that gravity doesn't matter and we can just hand-wave it away. But that is not how the metric system defines weight and force in addition to the problem using kilograms for weight and force in today's analytics.
en.wikipedia.org/wiki/Kilogram-force
Click bait!! Deceiving title. This video is about testing anchors!
I just love your anchors. I got sick and tired of our CQR just lying on its side and dragging across the bottom. Have replaced it with a Super Sarca on a 36 foot flybridge gamefishing vessel and couldn't be happier. It sets first time every time!
Interesting testing cheers lads
The best one looks like a Rockna Vulcan
Any thoughts on Sarca vs. Spade?
This test does not emulate boat anchoring. Boats are pulling at 45 degrees more or less. Not parallel with the bottom.
They do if you use a boat length of chain closest to the anchor and slpice in your line to that.