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New Hybrid Viper EO Teardrop

Discussion in 'Traditional Folders and Fixed Blades' started by NJBillK, Dec 30, 2017.

  1. NJBillK

    NJBillK Custom Leather and Fixed Blade modifications.

    Mar 27, 2014
    Let me preface this by saying that I don't quite know what to call a "modern traditional" hence the term "hybrid".

    With the release of the Lion Steel Euro-Barlow, and the impending release of the Lion Steel Shuffler, it seems as if others may be poking their toe into the water...
    Another Italian brand is looming to see what the fuss is about, and they are bringing some other modern touches to the porch table.

    Little things separate this from the Lion Steel offerings like a sunken joint, stainless liners, stop pin and spacers. But what Really makes it stand out, is what it doesn't offer; a back spring. Wait, What?
    Lacking a backspring to make it a slip joint, it utilizes a three position detent system to offer a fully seated open, half-stop, and closed positions. That being said, the detent rides in a "side spring" of sorts, so I am not sure of the technical term to denote such a mechanism (The "side spring" term was taken from Mike, below.)

    What do you folks think of the new guy?
    IMG_8285-300x225.jpg Screenshot_2017-12-30-21-02-13.png
    2017-12-30 21.13.42.png

    - 3 7/8″ Closed
    - 2 11/16″ Spear Blade; M390 steel blade with SS hardware.
    - Three position “Action Stopper System” (detent and blade stop pin)
    Last edited: Dec 30, 2017
    Will Power, Fox79, mas113m and 2 others like this.
  2. Hickory n steel

    Hickory n steel Basic Member Basic Member

    Feb 11, 2016
    Interesting, and a step in the right direction for the knife world but it certainly isn't a slipjoint.
    Too often do people use the term " slipjoint " to refer to any non locking folder that has some sort of retention mechanism to keep a knife open.

    I'm not sure this knife qualifies for the porch either, at first glance it might look normal to a guy in the 60's but if you handed it to him he'd find it very strange.

    It seems traditional enough to me, but im not sure about everyone else.
  3. NJBillK

    NJBillK Custom Leather and Fixed Blade modifications.

    Mar 27, 2014
    Edited and thank you for steering me in a more correct direction.
  4. r8shell

    r8shell Platinum Member Platinum Member

    Jan 16, 2010
    Is it a friction folder?
  5. strokednbored


    Aug 8, 2015
    I'm not sure what it actually classifies as, but i think it's interesting and something different that I don't see everyday.

    I'll try anything twice, haha.
    t.willy likes this.
  6. NJBillK

    NJBillK Custom Leather and Fixed Blade modifications.

    Mar 27, 2014
    Edited out out of not wanting to spread misinformation.
    See post below mine for a better explanation.

    The good part is that it wouldn't operate any different than a knife would in the 60's, just pull the blade out, cut, and close it. Nothing too different aside from the lack of a back spring visually.

    With that in mind, I think it should be fine in this section.
    "We give leeway on materials of construction. So if you have a nice stockman with G10 covers, it's traditional enough for us. After all, plastics have been used on knife handles since the 1800's. Stainless steel has been used in cutlery since the 1920's, so stainless is considered traditional. And even though PM alloys are new developments, that fella in the mid-1960's would never know the difference if he were looking at the knife, so they are OK, too."
    Last edited: Dec 30, 2017
    Hickory n steel likes this.
  7. knifeswapper

    knifeswapper Knife Peddler Dealer / Materials Provider

    Sep 3, 2004
    No. "Friction Folder" implies only the handle resistance (friction) keeps the blade open/closed. This knife uses a detent; think of it as a side spring.
  8. TheChunk91

    TheChunk91 Basic Member Basic Member

    Aug 15, 2013
    Well they get points for something fairly unique and interesting.

    Too different for my taste, call me old school I guess.
  9. Railsplitter

    Railsplitter Gold Member Gold Member

    Oct 31, 2010
    I'm not sure how I feel about this one just yet but I will definitely be keeping an eye on this thread. I like the sunken joint, the easy open feature, and of course, the blade steel. I'm not a big fan of shadow patterns which is what I consider this to be but I'm going to keep an open mind.

    Watching Mike close the blade in the video reminded me of the way the blade on a Sebenza seats into the closed position. A smooth ride almost all the way down with minimal resistance until it clicks into the detent at fully closed. Judging by the video alone, the blade action doesn't appear to be snappy upon closing. Not a criticism or a compliment. Just an observation.

    I'm curious if the pivot pin is adjustable and if so, what type of tool should be used.
    Kiteman72 likes this.
  10. Kiteman72

    Kiteman72 Gold Member Gold Member

    Jan 22, 2015
    I'm glad I checked this thread out! Reservation made! I'm a real sucker for a lanyard hole, and I love the open back construction.

    I hope more scale options are added, a funky acrylic/kirinite would fit the look.
    Laurelbb, mas113m and MessOnAMission like this.
  11. MessOnAMission

    MessOnAMission Gold Member Gold Member

    May 4, 2016
    This is right up my alley; lanyard hole, M390, teardrop pattern, concave standoffs, and natural canvas micarta. While I'm not a huge fan of shadow patterns, the pivot on this looks great.
    Kiteman72 likes this.
  12. Dirk D

    Dirk D

    Sep 3, 2017
    With this Viper develops the system they´ve used in their DAN models to another level. In the DAN models they´ve used this side spring with detend balls to support the friction folding system, but these models have still the blade hook, which sinks into the handle and is "locked" with yout thump. And the detend system was not so strong to keep it open, just a support.
    This development seems to be reliable and consequent. Maybe some of the hardbodied defenders of the traditional style will not see it as such, because of its screwd construction or something else, but for me it´s a wonderfull development and brings traditionals to a further step. Ok you might call it modern gentleman style, but for me it´s just a traditional on the next level. A ProTech Magic I would consider as a Modern Gentlemans folder. And this is sooo far from the tactical ones, so it can't be wrong! :thumbsup:
    Last edited: Dec 31, 2017
  13. Will Power

    Will Power

    Jan 18, 2007
    I like this actually, robust yet light. The skeleton construction is a nice idea, just hope they start making smaller knives it's too big for my pocket. Looks quality though.
  14. popedandy

    popedandy Gold Member Gold Member

    Dec 8, 2006
    Got my reservation in for a bocote
  15. Insipid Moniker

    Insipid Moniker Gold Member Gold Member

    Feb 28, 2011
    I like that a lot. Thanks for posting, OP, don't know 100% that funds will let me pick one up, but my interest is absolutely piqued.
  16. clutchcarter

    clutchcarter Gold Member Gold Member

    Dec 11, 2011
    I reserved one mostly because I'm a sucker for a teardrop. I wonder if the detents will become finicky from contamination after a while.
    Laurelbb likes this.
  17. knifeswapper

    knifeswapper Knife Peddler Dealer / Materials Provider

    Sep 3, 2004
    This mechanism, by this maker, has been on production knives (the Dan series) since mid-2015. I have not heard any concerns to date.
    Although I could probably spend some time and make any mechanism finicky by contamination :D
    NJBillK likes this.
  18. JB in SC

    JB in SC Gold Member Gold Member

    May 19, 2001
    Bob Terzuola developed a "double detent" system quite a few years ago which appears to be exactly like the mechanism described. His incorporated half stops and detents on both sides of the blade.

    Interesting concept that has been used by a couple of modern custom makers (Jens Ansø and Brian Fellhoelter) recently.
  19. L.H.S

    L.H.S Gold Member Gold Member

    Jan 1, 2013
    "side springs" aka detent ball pressure has never really seemed as secure as a back spring to me. I'll be interested to see how these will turn out.
  20. JB in SC

    JB in SC Gold Member Gold Member

    May 19, 2001
    The two knives that I have handled that have a double detent (a Fellhoelter and Ansø) are relatively secure but not as secure as a back spring knife. There's potential for some blade play when open. The detent ball and hole must be precision fit to keep play to a minimum. I would compare the Terzuola design to mini liner(s) with ball detents that engage detent holes in both sides of the blade in the open, half stop, and closed position to secure the blade in each position. It's more difficult to explain but is very simple when you see it.

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