THATS not a knife...THIS is a knife...

[EcoMuse]

Sweet Lord, check this bad boy out :o

http://www.waspknife.com/about.php

[Benno]

OMG - imagine getting a stab from that, you would be buggered instantly. I cant believe its legal in Aus tho??

[EcoMuse]

I cant believe its legal in Aus tho??

I have no idea re: its legality in Aus. I would imagine it would pass given that its not a double edged knife and its not a firearm...although Im only guessing.

It got me to thinking of similar systems in arrows......

[Sagitarius]

Nice, hope we can have them here.

[jindydiver]

It is complete crap, a gimmick designed to suck in mall ninjas

[DavidJHardy]

maybe rambo should have had one of these...LOL.

[Sagitarius]

It is complete crap, a gimmick designed to suck in mall ninjas
---

The bit about it making underwater stuff float up sounds good, though it would probably be better on a spear.

You don't think the gas injection would do extra damage?

[nev]

I agree jindy it never ceases to amaze me how stupid people can be to get sucked in with some of the crap that can be bought .

...nev..

[EcoMuse]

I agree jindy it never ceases to amaze me how stupid people can be to get sucked in with some of the crap that can be bought .

...nev..

Aint nothing as strong as stupid Nev ;)

[jindydiver]

---

The bit about it making underwater stuff float up sounds good, though it would probably be better on a spear.

You don't think the gas injection would do extra damage?

I think that if you get close enough to a shark to be able to stab it with your knife (and it isn't some docile grey nurse who wasn't trying to eat you anyway) you are going to be the loser either way. You don't have time to think "where is my knife" nor do you have the fine motor skills to be able to operate the gas system. Depth will negate the value of the gas also. They don't tell you the volume of gas except to say it is the size of a basketball. If it is the size of a basket ball at the surface then at 10 meters it is the size of a rockmellon, and at 20 it is the size of a softball, at 30 the size of a cricket ball... you get the idea.
You are going to want to retain the knife also, so when you pull it out what stops the gas from escaping the wound?
As for the claims that it freezes internal organs..HAHAHAHAHHA You don't see helium balloons freezing as they are blown up do you.

[Sagitarius]

I think that if you get close enough to a shark to be able to stab it with your knife (and it isn't some docile grey nurse who wasn't trying to eat you anyway) you are going to be the loser either way. You don't have time to think "where is my knife" nor do you have the fine motor skills to be able to operate the gas system. Depth will negate the value of the gas also. They don't tell you the volume of gas except to say it is the size of a basketball. If it is the size of a basket ball at the surface then at 10 meters it is the size of a rockmellon, and at 20 it is the size of a softball, at 30 the size of a cricket ball... you get the idea.
You are going to want to retain the knife also, so when you pull it out what stops the gas from escaping the wound?
As for the claims that it freezes internal organs..HAHAHAHAHHA You don't see helium balloons freezing as they are blown up do you.

Yeah I can't see anyone stabbing a shark with it either.:P If it were on a spear though it might be good for fishing.

I too don't get the freezing bit, it could be BS but the gas maybe a refrigerant, didn't see what the gas is though.

I automatically thought of it causing an air embolism but it doesn't say anything about that.:confused: Actually what it does say is a bit gimmickish.

[MaDsHafTeR]

Hahahahaha......I love the way the gimmick these things. I do a fair bit of spearfishing, and theres NO way your going to sink that into a shark, NONE. Unless......it shark was dead laying on the bottom, you wrapped you legs around it and used all your body weight to sink the knife into its VERY tuff skin. I know of guys that have had to fend off sharks with very very powerful spearguns, and they have only just got the shaft to penetrate. Someone would have bought it, and obviously someone thought of it as a good idea, or it wouldnt be there to sell.
"The injected gas carries the predetor to the surface", Id like to see that on a 175 kilo, Bull shark!!!!

[Clemo]

As for the claims that it freezes internal organs..HAHAHAHAHHA You don't see helium balloons freezing as they are blown up do you.

I can’t see the point in the knife for all the reasons you stated but the freezing thing may have some merit, depending on the type of gas. I didn’t read that it was helium. If it was compressed nitrogen or carbon dioxide both have good refrigerant properties (on expansion, absorb large amounts of latent heat). So potentially it could freeze organs in the direct vicinity of the escaping gas.
Either way, its total BS. ;)

[jindydiver]

I can’t see the point in the knife for all the reasons you stated but the freezing thing may have some merit, depending on the type of gas. I didn’t read that it was helium. If it was compressed nitrogen or carbon dioxide both have good refrigerant properties (on expansion, absorb large amounts of latent heat). So potentially it could freeze organs in the direct vicinity of the escaping gas.
Either way, its total BS. ;)

There is just not enough gas there to do anything at all. They contain a soda stream bottle (CO2) and the cooling effect of the release of the gas just isn't enough to freeze bugger all (well maybe something the size of a match head).
The ad is simple hyperbole designed to suck people into buying a gimmick.

[Clemo]

The cooling effect of any refrigerant (gas) is determined by its thermodynamic properties, heat of vaporisation and critical temperature and a few other factors. Obviously the volume of a refrigerant will affect the amount of heat it can absorb, but I can assure you Jindy if you release all the compressed Gas in a small Co2 canister and hold your hand over it you will receive refrigerant burns.
Knowing what a stickler for accuracy you are Jindy, I think you would agree that given the fact that we don’t know what’s in that canister we could not discount the freezing claim.
Semantics aside, yes it’s a gimmick to sell a piece of rubbish.

[jindydiver]

Clemo
These knives are not new, nor are their claims, and it is a soda stream bottle that charges it. I know a little about how gas release can burn, I have worked as a scuba technician, but we are talking about a cylinder with less than 100ml capacity pressurised to less than 60 bar, sure you could hurt yourself with it but it is barely enough to freeze your skin let alone "major organs" :D If the cartridges actually had liquid CO2 in them, then their claims would more likely to be closer to true

[Clemo]

I love your posts Jindy, if I ever need a lawyer im guna hire you!:)

[jindydiver]

A sure fire trip to jail LOL

[special]

Im with Mick and Nev...youd may as well get some explosive arrow heads and have the full set...theres allways someone willing to waste their hard earned on junk

[Sambar Hunter]

The actual quote is "thats not a knife, thats a knife"

[Duane]

I am a refrigeration mechanic, and if my opinion counts for anything, compressed CO2 GAS isnt going to freeze stuff all, if you compressed it to a point where it condenses into liquid form, then you have a potent refrigerant, as Jindy mentioned. By the way, just about any gas that is compressed absorbs a little heat when it expands. It is the change of state, liquid to vapour that does the real work.

[Clemo]

OH FOR GODS SAKE!

My point is that it didn’t state what type of gas it is, only that it is compressed to 850psi. Now as you are a refrigeration mechanic you will be well aware that there are plenty of refrigerants that will be in liquid state at that pressure, in fact some refrigerants are in liguid state at atmospheric pressure.

YES it’s probably CO2 and Yes I think it’s a gimmick, but without knowing the facts then you can’t discount their claim.

[jindydiver]

OH FOR GODS SAKE!

but without knowing the facts then you can’t discount their claim.

These knives are not new. The "inventor" was a short time member of a large US based forum centered around knives (joined in some misguided effort to promote his product), the gas is CO2 (refills for sparklywhip, soda stream et al)

[Duane]

OK, either way I would not want some "mall ninja" confronting me with it.

I just comented that CO2 Gas isnt going to do much. I did not say that their claim is inaccurate, I would have to test the product to make that claim. Something which I doubt anyone here is going to waste their dough to find out. So chill (pun intended) Clemo, I'll shout the beers.

Prob sell well in America, they seem to love gadgets.

[Clemo]

Its ok, im over it now.;)

I need to go hunting!

[Evil Taco]

thats the spirit mate go out and drop somthing! alot less confusing anyway... i had crap all idea what you guys were on about... alot of big words in there...

hey jindy how is it that you know everythnig about everything?... ur like a dictionary mate its crazy... :)

[jindydiver]

how is it that you know everythnig about everything?... ur like a dictionary mate its crazy... :)


I wish :)
And I read for hours each day trying :D

When you stop learning you might as well be dead