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post #7 of Old 09-25-2006
Craig Smith
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Originally Posted by camaraderie
Craig... while I frown on anyone knocking off another's patented design can you give any details on how Manson Supreme would "fool" anyone? Are there differences in construction or performance that you think are significant or should they be avoided simply because they are making $$ off of your proprietary work?
Now who said I was talking about the Manson Supreme?

There is a difference in price - any American buying a Rocna has two options, buy from us in NZ and pay horrendous freight costs, or buy from Vancouver at a higher retail price and - well, still pay horrendous freight costs. This we hope to rectify shortly. However there remains the "you get what you pay for" difference, and our USD recommended retail will still be "moderately priced", not "cheap"; we're not about making cheap rip-offs, we're not based in China, etc. However you will find us competitive with most other genuine brands, and especially competitive with the top stuff, like genuine CQRs and Spades.

When a copier sits down to make his copy, he has two options. One is to copy the anchor identically but take manufacturing short-cuts to save money (the only way he'll sell his copy is by making the retail price cheaper). Witness many Chinese made claws. The other is to "improve" it, but most "improvements" are done by idiots that don't fully understand the original product, certainly not like the original inventor did. Witness any number of CQR and recent Delta copies that are not as good as the originals. Or any with gimmicks like slotted shanks, floatation bubbles, etc.

There are certain things we refuse to compromise on. For example:

Since we don't have a three-dimensional tip (like a plow or the Spade, which have because of their lead inserts), we need to make sure the tip is very strong. We do this by creasing the blade, which is a more expensive process than rolling. The crease then runs the full length of the fluke and together with the solid steel provides as much strength as possible.

We don't laminate steel. Metal doesn't gain strength from lamination in the same way that other materials do, it's often just edge-welded so the space between the sheets is effectively hollow. In addition to a ridiculous lack of strength, this has massive other implications. For example the weld is usually ground off to make it look nice, and the laminate edges might not be properly chamfered before joining. Result: not much weld holding your fluke together. Or, maybe the galvanizing blows it apart. Or, it doesn't, and the anchor rusts from the inside out.

We form a proper concave shape by raising the heel of the fluke, so it is a two dimensional spoon, not a one dimensional upside-down plow.

We have a properly designed shank intended to fit on as many rollers as possible, and work well with regard to self launching and retrieval. A shank with a tall profile is a bad idea, since anchors frequently come up sideways or upside-down. The shank must be of such a shape that it can rotate while in the roller, and it needs to do it fairly quickly. If you look at plows and claws, their shanks are usually of quite a low profile - for a reason.

Our shank is high tensile steel. We don't destroy the metal's tensile strength by running a gas cutter up and down the inside of the shank.

Our tip-weight is 30% the weight of the anchor. That's more than a Delta and not bad for an anchor with no dedicated tip-weight (lead).


And we know a whole bunch of stuff that other, ahem, designers don't, so they make mistakes.

All of which adds up to an anchor which apparently did better than a certain other anchor (supposed to be the same) in a certain recent independent test, and by the way said certain anchor was 10% larger than the Rocna.

Sorry if that sounds like an informercial, but, with no names, hopefully that should arm you with some knowledge with which to go comparison-shopping. Any more and it'd read like a list of instructions "how to fix my copy".

Craig Smith

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Sailnet Disclosure: Craig is the son of the designer of Rocna and has a financial interest in its success.

Last edited by Craig Smith; 07-08-2011 at 07:41 AM.
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