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What's perfect should not be improved....

Discussion in 'Fins, Masks & Snorkels' started by emoreira, Feb 23, 2021.

  1. emoreira

    emoreira Dive Resort

    # of Dives: 200 - 499
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    I was impressed with this pic, as I'm in the telephony engineering business.
    151585122_4019606654729621_2095525609132515151_n.jpg
     
  2. Akimbo

    Akimbo Just a diver Staff Member ScubaBoard Supporter

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    I like Jet Fins too but have never seen anything that can't be improved.

    full.jpg

    As you can see, I'm also a fan of bungee straps.
     
    Bob Evans, lexvil and emoreira like this.
  3. emoreira

    emoreira Dive Resort

    # of Dives: 200 - 499
    Location: ARGENTINA
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    Good point, spring fin straps are the best. Done with stainless steel springs or bungee cord.
     
  4. lowwall

    lowwall Loggerhead Turtle

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  5. tridacna

    tridacna ScubaBoard Supporter ScubaBoard Supporter

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  6. emoreira

    emoreira Dive Resort

    # of Dives: 200 - 499
    Location: ARGENTINA
    1,862
    446
    83
    204494_10151236476409639_1496697308_o.jpg
     
    Pressurehead and lowwall like this.
  7. lowwall

    lowwall Loggerhead Turtle

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    Joris Vd, Hoyden, emoreira and 2 others like this.
  8. OTF

    OTF Solo Diver

    # of Dives: 200 - 499
    Location: New England
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    I love jet fins and own multiple pairs. They are the best fins period. But lets start some controversy here :troll:. After all, criticism and analysis are the highest forms of flattery.
    • The foot pocket kinda sucks and could be modernized to be more foot-fitting.
    • The sizing methodology is unclear and different versions are slightly different measurements.
    • The new jet fins are nice but made overseas (probably in a factory with worse environmental regulation and worker treatment) from a different material so may eventually prove to be inferior to the time-tested USA-made fins that last decades. Also they have a big hole in the tip which is nice for hanging but hydrodynamically dubious.
    • A lot of people love jet fins because they're one of the heaviest fins on the market and help alleviate floaty-foot trim in drysuit, thick wetsuit, or tech configurations. But one could argue that it's more efficient to run a lighter fin and add that trim weight elsewhere on the rig (backplate weight, longer tanks, etc.) rather than on your feet. Sort of like "unsprung weight" in a car, it's a bad place for extra weight because you have to move the additional momentum with every kick. Theoretically it's more energy intensive. Probably too small a difference to matter.
    • And now for the biggest, most interesting point:
      I've never seen any physics or hard experimental evidence proving that the jet fin vent (or indeed any other) design really IS better than all the other gimmicky fin efficiency features out there. Does the vent really make jet fins that much better than an unvented paddle of equal stiffness and weight? Is the vent optimally designed? I would love to see some good independent science done on this. That said, they do seem to work, and anecdotally work better than similar knockoff fins with less vent overlap (eg. RK3s).
     
    Wibble likes this.
  9. tridacna

    tridacna ScubaBoard Supporter ScubaBoard Supporter

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  10. lowwall

    lowwall Loggerhead Turtle

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    See and raise? Just "Raise" probably. I'm not much of a gambler.
     
    tridacna likes this.

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