VTbowman Posted September 8, 2006 Report Share Posted September 8, 2006 I have read a few times that the G5 Tekan I mech head will open every time without fail. Though I have long been 100% confident in any mech head I used to open upon impact, I decided to run a couple of my own tests. This is the 1st mech head I have used that opens by sliding backwards vs swinging open and not being retained by an o ring. The o ring pushes outward against the back of the blades. Some doubt were lingering. LOL I set up at 20 yards with 2 types of light material. 1st shot was though a single piece of card board. 2nd shot was though a single piece of printer paper. Opened both times!!!! You can see how the arrow head shaped front cut on contact tip makes a 5/8" cut and then the blades make a 1 5/16" cut. If you look closely at the paper hole you can see where the vanes hit as well. Not where the paper is cut. Works like a 4 blade head IMO. Quote Link to comment Share on other sites More sharing options...
AdvantageTimberLou Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! I have some Tekan II's and they do fly nice don't they Shawn, G5's Montec flys just as sweet being a fixed head! Quote Link to comment Share on other sites More sharing options...
Guest Bob_D Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! Ok....Where is the high speed camera footage showing that they did not open in flight? Quote Link to comment Share on other sites More sharing options...
hutchies Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! That is pretty convincing. I wouldn't be afraid to shoot them. Quote Link to comment Share on other sites More sharing options...
Jeramie Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! [ QUOTE ] That is pretty convincing. I wouldn't be afraid to shoot them. [/ QUOTE ] I hear that! The paper tipped that ice berg! Quote Link to comment Share on other sites More sharing options...
Bownarow Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! I'd say with that type of hole in the paper that they may have opened in flight. Just a thought. Quote Link to comment Share on other sites More sharing options...
VtBowhunter Posted September 8, 2006 Report Share Posted September 8, 2006 Re: Tekan I blade opening testing! You knew I wouldn't stear ya wrong, Shawn. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted September 9, 2006 Author Report Share Posted September 9, 2006 Re: Tekan I blade opening testing! [ QUOTE ] I'd say with that type of hole in the paper that they may have opened in flight. Just a thought. [/ QUOTE ] This is quite possible and I have no real way available to me to prove otherwise. Believe me I had this thought as well. However I would think if that had happened that there flight would of been erratic at best with 2 blades flopping around. They free float and slide backwards and resistance keeps them open fully. The o ring literally pops them open once the blades slide back like 1/64" then the resistance s;lides them the rest of the way back where they are help open by the design of the channel they slide threw. I shot several times this way to test them and they opened evertime. Then shot 1 mech head and 1 field tip to see if they grouped together and I had arrow slapping each other every time. I was smart to shoot the broad head 1st. LOL Quote Link to comment Share on other sites More sharing options...
BowJoe Posted September 9, 2006 Report Share Posted September 9, 2006 Re: Tekan I blade opening testing! I don't understand how you could open blades with as little resistance as paper and still get the large cut showing the blades had expanded. I always thought the blades opened from the force of going through flesh and only opened after they passed through the flesh maybe an inch inside the animal. Quote Link to comment Share on other sites More sharing options...
JJL Posted September 9, 2006 Report Share Posted September 9, 2006 Re: Tekan I blade opening testing! The fact of the matter still remains this............ " you can kill them with a spoon, if you can get them in the right place" You still have to make the shot. JJL Quote Link to comment Share on other sites More sharing options...
Guest benhohnke Posted September 10, 2006 Report Share Posted September 10, 2006 Re: Tekan I blade opening testing! Would you like to give a demo of how to kill something with a spoon Quote Link to comment Share on other sites More sharing options...
Strut10 Posted September 10, 2006 Report Share Posted September 10, 2006 Re: Tekan I blade opening testing! If I'm not mistaken, tough......I think that's why there is a Tekan II. I think the Tekan I's opened too easily at times.......like in your quiver, etc. Quote Link to comment Share on other sites More sharing options...
JJL Posted September 10, 2006 Report Share Posted September 10, 2006 Re: Tekan I blade opening testing! [ QUOTE ] Would you like to give a demo of how to kill something with a spoon [/ QUOTE ] Just as soon as I get done with this season I'll see if I can put together a video for you. My wife will be mad, because it usually ruins the spoon. But, if I have to do it, I'll do it. I can't help but notice that your from Australia, I'll probably have to use Beta for yours. God Save the Queen JJL Quote Link to comment Share on other sites More sharing options...
VTbowman Posted September 11, 2006 Author Report Share Posted September 11, 2006 Re: Tekan I blade opening testing! [ QUOTE ] I don't understand how you could open blades with as little resistance as paper and still get the large cut showing the blades had expanded. I always thought the blades opened from the force of going through flesh and only opened after they passed through the flesh maybe an inch inside the animal. [/ QUOTE ] Without the benifit of actually having the head in your hand to inspect its operation or ease of opening its hard to explain but I will try. The design is such that the blade are retained only by outward pressure of the rubber o ring behind the blades, which is around the back of the ferrel right next to teh insert of the arrow. Only a washer is inbetween the o ring and the shaft. It puts all this outward pressure right at the very front edge of the blades as it sits on top off the front of the channel that in the ferrel. The blades piviot point is about 1/8 away from the front of the blade and inside the channel. With the slightess resistance pushing the blades backwards, about 1/64", and when the bottom edge of the front end of the blade clears the end of the channel, the rubber outward compression pops the blades outwards to open. At the same time the front of the blades are still in contact with the paper/skin which then only sldes them back toward the rear of the ferrle channel. There is zero resistance to the blade in a sliding backwards motion thus they basicaly stay open fully as they slide backwards due to the o ring being behind them but at the end of the ferrel. The front cut on contact tip and ferrel body is the only thing entering the paper/animal at this time. Once the blade hit the back end of the channel they are forced to stay open by the steel washer and then, and only then, do they start moving with the entire head. Thats when the cutting begins to open up to 1 5/16" wide as the resistance is placed on the cutting edge of the blades. Basically they pop open and ride backwards with the material being shot until they can not slide anymore then are along for the ride with the rest of the broadhead and arrow. Thats why the impact of paper can open the blades. You can see this by pushing a tekan threw paper by hand slowly. Once the paper hits the font of the blades they pop open but do not cut anything until they reach the back end of the channel. (I did this too just to see it) I still can not prove that they do not open in flight. Not unless I get some high speed video and I have nothing like that available to me. I can say that after shooting them all morning and afternoon long, at least 3 dozen times, that not once did I have a flier. Nor did I have anything but arrow touching arrow when shot with a field point tipped arrow. EVERY TIME. I just can not believe that a mech head with 2 flopping blades would shoot that accurating, every time, if they were indeed open from the release, and across 20 yards of flight. If so then my results will still be the same. Spot on accuracy and a big holes threw whatever I shoot them at. I am convinced they opened up on the paper. Mind you I used printer paper, not note book paper, tissue nor toilet paper. Maybe I should decrease the tension of the paper by using lighter/thinner stuff to see what sort of hole I get. I doubt that tissue paper would open the blades. If I get holes cut wide threw that stuff then maybe they are opening during the shot. Opinions? Quote Link to comment Share on other sites More sharing options...
AdvantageTimberLou Posted September 11, 2006 Report Share Posted September 11, 2006 Re: Tekan I blade opening testing! Love your write ups Shawn, very informative, thanks for taking the time to do that! Quote Link to comment Share on other sites More sharing options...
Guest Bob_D Posted September 11, 2006 Report Share Posted September 11, 2006 Re: Tekan I blade opening testing! [ QUOTE ] Opinions? [/ QUOTE ] Yeah....You're ugly. Oh.....about the broadheads. It does not make a difference when they open, as long as they open and hit where you are shooting. Quote Link to comment Share on other sites More sharing options...
VTbowman Posted September 11, 2006 Author Report Share Posted September 11, 2006 Re: Tekan I blade opening testing! [ QUOTE ] Love your write ups Shawn, very informative, thanks for taking the time to do that! [/ QUOTE ] Man I got to learn to tapper them down some. I was eye poping when I saw it posted on how long it was. LOL I have to agree with Bob too. I am ugly. i mean... If they hit were I am aiming then I guess it does not matter. I still feel super confident they are closed before impact though.... I know some still disagree... Quote Link to comment Share on other sites More sharing options...
VtBowhunter Posted September 12, 2006 Report Share Posted September 12, 2006 Re: Tekan I blade opening testing! Yep, you are ugly........and the heads fly good too, lol. Quote Link to comment Share on other sites More sharing options...
BowJoe Posted September 12, 2006 Report Share Posted September 12, 2006 Re: Tekan I blade opening testing! I'm not disagreeing since I have nothing to base it on but just wondering. Hey, as long as they hit where you are aiming then that's what matters. Quote Link to comment Share on other sites More sharing options...
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