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The coolest Fletching Invention Ever?


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Old 07-03-2014, 07:00 PM   #1
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Default The coolest Fletching Invention Ever?

A young inventor from Prague, Jan Kokes, contacted me a while ago, saying that he had invented (actually filed a patent application) a completely new fletching invention, with huge advantages compared to the common vanes.

I was interested of course, but then I did not hear back from him for a long time. Now he sent me an arrow with his "turbine" vane!

That's right, a single blade, much like an arch... I could not believe it, but the thing flies amazingly straight and I think it is also faster. The spin rate is really high.

Can't wait to shoot some 1000 fps material of the thing in flight!

I have a feeling we are witnessing the next big thing in arrow technology.

The coolest Fletching Invention Ever? - Off Topic
The coolest Fletching Invention Ever? - Off Topic
The coolest Fletching Invention Ever? - Off Topic


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Old 07-03-2014, 07:16 PM   #2
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Hell yeah brother Czech! I expected somethong bigger. This is very cool, innovation!


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Old 07-03-2014, 07:25 PM   #3
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Is the arrow all the same diameter or is there a special shape?

I would expect a asymmetrical sideways force that would steer the arrow.

However, since it spins, the angular momentum may be the reason that it shoots straight.

Looking forward to the weight and speed tests,
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Old 07-03-2014, 07:41 PM   #4
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Be interested to see your video.
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Old 07-03-2014, 07:51 PM   #5
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That's a cool concept.
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Old 07-03-2014, 09:43 PM   #6
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This is very interesting! I have often wondered if, on modern high-speed compound bows, the fletchings would make any difference at closer ranges. Just out of curiosity, I have shot several unfletched carbon arrows at 30-40 yards in the past. They all hit just about exactly the same as normal, fletched shafts. However, this was done with 100 gn field tips, not broadheads.
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Old 07-03-2014, 09:49 PM   #7
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Front heavy symmetrically tipped arrows need no fletching. But a broadhead will "want" to steer the arrow.

This "turbine" will make the arrow spin MUCH faster than a normal one.

Again, this may well be a huge step in archery, potentially the biggest one since CF arrows and eccentric cam wheels came along.
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Old 07-04-2014, 03:00 AM   #8
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Very nice concept.
I can see an easier approach, way to do this though... the mounting to the shaft is a little wonky....
Instead, imagine something like premeasured/die cut tape or sticker strips instead... maybe two inches long at most... pull the backing off the sticker/tape and wrap it around the shaft leaving a tab/half fin... then the sticky side adheres to sticky side creating the whole fin.
With a die cut asymmetrical sticker that adheres to itself you could easily get the desired spin with minimum drag AND super easy installation.... You might suggest something like that to the guy before a big company comes along and does exactly what I suggest based off his concept.


Quick and dirty illustration of what I mean... precise angle of attacks and other measurements would have to be done for making a die for cutting and making the precision vane/fin
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Old 07-04-2014, 04:20 AM   #9
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Bill, the first samples Jan sent were made much like this. But it turns out that the "arch" design works a lot better than a vane like shape.

Much testings will have to be done anyway... I think that the arrow weight and speed will call for different sizes and shapes of the turbine.
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Old 07-04-2014, 05:55 AM   #10
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Oh wow...this is SO exciting ! Can't wait to hear more about it and see some videos / tests. Bill's modification sounds very interesting. Vanes / fletching have been a bit problematic for me. Since I got into shooting this one the arrows often go right through the target and backstop which tends to tear the vanes off...a bit of duct tape would only take seconds to replace.


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