2014 lunocet

[neurodoc]

I know many have been looking for a new spring (including me) so I've found out some info at the source. Ted has worked out a way to form the springs under compression to create a more consistent/durable spring, and has a big batch he is working on. Springs will begin shipping on Monday! The new upcoming Lunocet design will be easier on springs, because of two factors: the double pivot spreads out the loads much more, plus the hard flex limit built in and noticed by Chipswim will prevent overflexing the rubber spring as can happen now. Overflexing is what ovalizes the pivot pin and anchor pin holes, so that problem should be eliminated with this next revision.

 

[divebike]

I know many have been looking for a new spring (including me) so I've found out some info at the source. Ted has worked out a way to form the springs under compression to create a more consistent/durable spring, and has a big batch he is working on. Springs will begin shipping on Monday! The new upcoming Lunocet design will be easier on springs, because of two factors: the double pivot spreads out the loads much more, plus the hard flex limit built in and noticed by Chipswim will prevent overflexing the rubber spring as can happen now. Overflexing is what ovalizes the pivot pin and anchor pin holes, so that problem should be eliminated with this next revision.

What is a double pivot point, I don't understand.

 

[divebike]

What is a double pivot point, I don't understand.

This spring that ted is using is very novel as what i'm aware of, does anyone know of it's use elsewhere, an easily adjustable and reliable spring is what's really needed, from other industries and technologies does anyone think there is something that might suit this task better.

 

[Chipswim]

A hinge with two pivot points... One on each end of the green center link. .... Think vertebrae now instead of hinge. That is where we are going!

The spring is unique to this application. Certainly invented by Ted Ciamillo specifically for Lunocet. The new molding and curing under pressure should yield a much more robust material.

I've seen this manufacturing with pressure detail work brilliantly in other applications.

 

[hairywater]

I see some functional similarities between the Luno "spring" and a longboard truck bushing. http://newtons-shred.blogspot.ca/2013_09_01_archive.html?m=1
Ted should talk to the guys at Ronintrucks about urethane.

 

[Chipswim]

Neat connection to make Hairywater! Cool to see you photo on your board!

 

[noa]

I see some functional similarities between the Luno "spring" and a longboard truck bushing. http://newtons-shred.blogspot.ca/2013_09_01_archive.html?m=1
Ted should talk to the guys at Ronintrucks about urethane.

As you can read from past posts, I've been talking about urethane all along. I'm happy others are seeing the same possibilities.

 

[Chipswim]

Noa!

Since Ted revealed you as the originator of the bicycle shoes for foot pockets idea I've come to accept the times when you are so far ahead of the rest of us that we can't yet appreciate where your ideas may take us.

 

[noa]

Noa!

Since Ted revealed you as the originator of the bicycle shoes for foot pockets idea I've come to accept the times when you are so far ahead of the rest of us that we can't yet appreciate where your ideas may take us.

You my friend, are going yo give me a big ego : ) but thank you for the kind words...
Some things are just blatantly obvious to me and beg to be done. Having said that, it's just one point of view among all others.

 

[Raffy]

I've been following this thread regularly, though I haven't contributed for a few months. Thought I'd say hi to all of you Lunocet enthusiasts again.

Personally, I'm still waiting for my Lunocet Pro, but I'm in no hurry as I stated in my last message on this topic. I ordered a Lunocet classic at the end of November last year, and returned it to Ted a few weeks after receiving it in February in exchange for the Pro. The way I see it, I'm investing in my own small way in a promising technological advance for freedivers that is still in development. I look forward to trying out my new Lunocet Pro when it's good and ready, and when it does get here I will know that a tremendous amount of care and thought went into making it.

I'm happy to see that improvements are constantly being made to the spring, the peduncle and the fluke. The rubber spring was definitely one of the things that I didn't like on the Lunocet classic, since it seemed that it would wear out quickly and even after a few sessions in the pool, a dead space began opening up between the spring and the peduncle when the fluke changed direction. It looks like these new designs for a double-hinged mechanism and the use of more robust materials for the spring address this issue. I am glad that I have not received my fin yet as revisions like this make it all the more worth the wait.

 

[Chipswim]

Raffy!

Playing it the same way. Think we'll be suddenly happy in exchange for our patience.

Chip

 

[hairywater]

I brought up the topic of longboard bushing, because it seems to me that they are likely a disposable item. They should be available in different durometers to suit the swimmer, in much the same way lb truck bushings are. http://www.ronintrucks.com/shop-2/parts-accessories/#!/~/category/id=1734940&offset=0&sort=normal

To address distortion ..maybe this:
http://www.ronintrucks.com/shop-2/parts-accessories/#!/~/product/category=1667188&id=35477094

 

[Sarcomere]

Or incorporate a fiberglass batten or something like liquidmetal with better energy conservation.

 

[Apneaddict]

The right rubber durometer and construction process will work great. Rubber is an awesome material and just needs the right composition to work well.

I got one of the early springs that doesn't distort and it's great. I don't see the benefit in going to something else.

The rubber Ted used is also buoyant - so that definitely helps!

I'll try it this weekend in 4*-7* water to see how the stiffness is affected. May have to remove a pin or two!!

 

[neurodoc]

I almost got to use mine in the ocean at Gulf Shores Alabama, but spent all day fishing instead...the ocean was rough for shore entry and double-x shark warning flags were posted everywhere. Apparently lots of shark sightings! I certainly saw several sharks, but all were pursuing gamefish that were on hook and line. Missing my Luno-swim...maybe tonight!

 

[Chipswim]

AA!?!? Have you just now received the spring you are describing and testing?.... Is it the newest one made with the new pressurized rubber molding process of the future spring for existing pros and to be extended for the 2015 Lunocet...?..... Or is it the one you have from before the problem? Sounds like choice A and you like it!!!! Correct?

Missed a few days swimming for Miss Nebraska contest. Daughter made top ten! Photo with my sister and daughter and I on my 64th birthday. Have learned to duck when I want my head in a picture....

Had another enjoyable swim with 2014 Luno this morning..... Interim training technique holding breath while watching for postman may be too intense...... Risking mental stability.

.

 

[neurodoc]

Nice pic! And quite an accomplishment too, being in the top ten.

 

[thistent]

I'm waiting for my Lunocet here in San Diego. I do some body surfing and I'm thinking about trying to jump/catch waves with mine as well as 'hydrotouring' ..so extra maneuverability would be valuable to me..

I've been thinking it might be interesting to look into the possibility of a model that mimics humpback flippers and flukes with tubercles. Supposedly, they increase the range of angles before stalling and make turning easier. There's already a company (whalepower.com) that's using humpback tubercles on the leading edges of their wind turbines to increase efficiency.. something about vortex formation between the tubercles that makes the water (or air in the case of turbines) flow faster over them and also causes the flow to 'hug' the fin closer.

A related topic is how the dimples in golf balls reduce the size and drag of their wake and thereby increase travel distance. There was an episode of Mythbusters where they increased the fuel efficiency of a car from 26 to 29 mpg just by adding golf ball dimples.

 

[Chipswim]

Could you define tubercles. Reading the original aqueon patent I noticed the inventor spoke of grooves he ground across the leading edge of his foils as though that feature made a remarkable improvement in performance.

I have queried Ted about that feature but it was a short topic and we moved on to something else. I've thought of grinding such grooves across the leading edges of my current flukes to see if there is a noticeable effect. Are we on the same page here?

Now starting to Wonder if imperfections in my skull are helping me breeze through life?

 

[neurodoc]

Chip, I have a pretty bumpy skull too. I hadn't thought of the hydrodynamic advantages! LOL. Here's some info on humpback flukes and hydrodynamics: www.researchgate.net/publication/15547901_Hydrodynamic_design_of_the_humpback_whale_flipper/file/9c96052330292d0ce2.pdf