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2014 lunocet

Thread Status: Hello , There was no answer in this thread for more than 60 days.
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Ooops....?#4?

Maybe ask how many pins instead.

Did that happen with no pool walls? In open water? If so I concede my honorary "butcher" status!

Neurodoc... None of this for you?

Marginatus... Maybe consider the spring protective strategies we have discussed if yours clears customs?
 
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Chipswim and noa, I find that my fin does get a bit of a dead spot, but only following sprints or sustained high-speed attempts with a very strong push. It goes back to round after resting overnight, for the most part. Swimming in a more gentle/peaceful stroke does not cause this. What I'm seeing is the result of the hole in the rubber spring ovalizing very slightly where the pivot bushing (that the pivot pin goes through) or the forward anchor pin. I don't find that it affects my ability to swim with it very much, if at all. Being the tinkering type, I am going to experiment with using a pivot bushing with slightly thicker walls, ie larger outside diameter, to pre-stretch the hole so it does not ovalize. I may also see if I can use at least a thin-walled bushing around the forward anchor pin to distribute the load more evenly on the spring rubber and also provide a degree of pre-stretch there. I do not know what Ted has up his sleeve to improve here, but I would not be surprised a bit if he made some improvements on this over time.
 
Hmmmmmm..... I like your ideas. Those would keep your totally clean original appearance too!

That magnified bushing could work! Hadn't even considered the idea of pre loading that way. (I guess fearing the spring couldn't stand it.) That would work too..... That would be spectacular... If the spring can stand it. Ok? How do you propose to get / drive a larger outside diameter bushing in there? Tough material! Would almost have to be a cone to start then grind off the cone part after its job is done and the rest of the pin is in place.

Some of our forum buddies are long distance / long time for mailing. There will be creative juices flowing from each of them to keep those super sweet swims coming.

I find it particularly interesting that your spring holes rebound more over time than immediately. That increases the chances your over expanding solutions would live.

AA none of this after you switched to the less rigid spring? Better a stock solution you have already unearthed.

Likely Ted is way ahead of us but we find our own way til then.
 
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Reactions: neurodoc
I'm open to anything...
I tend to like things as "clean" as possible but I do some tweaking specially to my carbon guns.
Right now I'm focused in getting it (but reading with full attention)
 
When mine arrives it will get some protection before it gets wet..... At a minimum some zip tie external support to keep the pin holes from oblonging. Likely a full exo spring after Noa's experience. That's what led me there in the first place. Want my Pro to keep it's wonderful swimming personality intact even hiding some of its external beauty.

Carbon guns?
 
Reactions: Fredd
That exo spring doesn't sound bad...
C4 Urukay 120, graphite 116 and graphite 83
 
Reactions: neurodoc
The base idea of the exo spring is to keep all the Lunocet's designed performance more permanently available!

Maybe it is still ok pure stock with AA's 2 nd spring from his review. I'm sure he said he uses walls to turn = the ultimate test. Didn't he use walls to turn in his video 100 dyn? Not violent turns though... Like starts or sprints with turns.

You guys keep prying my eyes open. Wonder if those carbon weapons are even legal over here. Undetectable? My big time gun buddies never talk about that. I'll get them to explain it to me.
 
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Those are spearguns
 
Reactions: neurodoc and Chipswim
Oops! Ignorance peeked through!

Never even seen an under water fish shooting weapon in person¡

Clearly you guys have more work to do on this underwater info transfer! I'll go read a thread about spearing. All I know so far is that Fondue swims parallel to calm the quarry. Found other uses for that idea.
 
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Reactions: neurodoc
Te
marginatus said:
Awesome!
I need to go to customs tomorrow for paper work and fees but won't be able to bring it with me...
Click to expand...
l the idiots to hurry. Do they realize what they are withholding from you ???
 
I swam in open water. Not a friend of pools or chlorine water. No need to be either when I have beautiful clear Mediterranean water a five minute walk from my front door...
The swimming and diving was done at all speeds. I do like to sprint at times and I do love the feeling of speed underwater. The spring "slop" did get accentuated after faster swimming...
 
Exactly what I have found. And exactly how I am initially planning to remedy it. A bigger pin cannot go in as the frame will not allow it, but like you said a sort of "sleeve" or bushing that goes in the spring to preload it should help. Like I was thinking, this hole should be made tighter by Ted to compensate for the ovalizing.
 
One question, I have not yet tried to remove the central pivot pin. How does one do that in order to completely remove the spring ? To be noted, I have very slight play in that pin also. Do your fins have the same ?
 
You guys swim in the coolest places!

The first photo is TWO sets of the nylon end caps that slide over the stainless steel central pin. Ted had sent an extra set when I was trying stiffer springs. Even well used those nylon parts showed no wear.

The second picture shows a new and well worn spring side by side. The springs are where the wear occurs. As you described you can feel it when the fin is assembled but you cannot see it. I'm still using the new spring in that photo a few months later. It's is working fine but I exo springed it immediately. My guess is that it now looks a lot like the worn one in the photo. I did send the worn one back to Ted for his observation. I'd guess it gave some direction to our as yet unrevealed future!?

The third photo is the exploded view. It is not difficult to take apart or reassemble so fear not! Once the flukes are off you can extract the white nylon central pin end caps revealing the thin stainless steel pin they hold in position. You can see the thin pin just left of the hinge center it was removed from in the photo.
 
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Thinking biologically the rubber spring is imitating muscle..... The aluminum frame is bone.

Nature shows us examples of muscles inside of exoskeleton creatures (lobsters) and muscle outside.... Bones inside other creatures like ourselves and fish = endoskeleton.

Trying to help my fin live I thought it needed muscle = rubber BOTH in and outside the frame. The exo spring worked great day one so I've never taken it off. I stretch or break the nylons zip ties that hold it on and adjust it eventually but it's a couple of minute project to tighten or replace them.

The original use for the rubber discs cut from tire side wall was as a slow speed U joint on center pivot sprinklers. I picked some up in a recycling yard at the manufacturer decades ago thinking they might be useful on the ice truck or some other project some day!
 
Reactions: Fredd and neurodoc
Your ice truck is seriously the bees knees ! Thanks for your pictures and explanations. One can clearly see the metal bushing around the central pivot pin and that is also probably what needs to be done on the forward anchor pin.
Let's let Ted know about this.
Another things that comes to mind is maybe working on a rubber formula/hardness that will have better shape memory (flexes, but immediately returns to its original shape and position).

Just returned from my second swim of roughly two-three kilometers. I had the stiffest setting and wore a neoprene half sock to get rid of any play inside my shoes and have super direct power transfer.
The feeling is quite different from the previous three pin setting. I liked both, the stiffest gave even more power which was great to feel, but took a little more power from me to provide that. Will need more swims to decide on my preference, but it will probably fluctuate according to how I wish to swim and dive on a given session.
The feeling is still amazing. The play is also still unfortunately there.
All good though. Besides the fantastic experience the fin provides, I feel really happy to be part of this core group that is getting to experience this fin in its initial stages and hopefully contributing somehow to its development.
 
Reactions: Fredd, Ted Ciamillo and neurodoc
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