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ragnar wrote:Had a "materials day" in my club last weekend, and speed-tested a few of my Korean bows.
Those were a Kaya KTB with 30lbs, a Nomad with 40lbs and a Windfighter with 50lbs. Draw weight at 31" as usual.
Shooting the same light 240 grain carbon arrow with each bow, I got the following max. speeds:
Kaya KTB : 195 fps
Nomad : 215 fps
Windfighter : 235 fps
The averages were about 5 fps lower.
Worth noting that the draw weights are the nominal one's at 31". With my draw of 29,5", I get about 42 lbs with the Windfighter, for example.
Would be interesting to have data at a draw of 32" and 7gpp...
geoarcher wrote:JGH wrote:Just measured once again, 42lbs at 28, 64 at 32,4" 50"Kaya Black Cat 40lbs. Measured from nock to back of bow.
Schau dir mal die Kommentare in dem schweizer Video an...
So I take it you are using an actual luggage scale to get these results?
Yes, but also have a big commercial grade mechanical scale, but is the same. Also used a proper mechanical bow scale at our club and measured 60lbs at full draw....
54lbs at 31"...
ragnar wrote:I find that 60lbs implausible, too.
Except he really pulls against the "wall", where nothing bends anymore.
Just measured once again, 42lbs at 28, 64 at 32,4" 50"Kaya Black Cat 40lbs. Measured from nock to back of bow.
Schau dir mal die Kommentare in dem schweizer Video an...
geoarcher wrote:
Well if the bows are rated around 60lbs at whatever draw length combined with with a light enough arrow then sure.
But I'd redo math for your bow rated at 40lbs.
In the same videos comment section you will find a comment from somebody who bought a 50" 60 lbs Kaya and measured 65lbs at 28 and 94lbs at 32,5", so a bit similar to mine 40 lbs at 28 and 60 lbs at 32. It has a sticker saying 40lbs, seems they adapted western standards, while the product description says that they measure at 30".. Still it seems not fully clear on how to measure draw length. In that video they at least show how they measured, but I'm not sure if they really had 34" arrows for the 52" to really shoot this one at max draw length....
geoarcher wrote:JGH wrote: Martin Spörries....
Never heard of him. Did YT search and nada.
Have to say again, this thread, completely hijacked. Oh well.
https://youtu.be/OGBCs1UeaIs
geoarcher wrote:JGH wrote:Kaya 40lbs, (60lbs at 32)
That's a huge leap btw. The formula I use looks like this:
(rated draw weight)/(rated length - brace height)*(draw length - brace height)
Based on that I get 47.11111111111117 lbs@32". That's of course assuming your Kaya is 40lb@28" and your brace height is either 5.5 or 6 inches. For this result, I assumed it was 5.5 inches. Even with 6 inches it would be within range of that. But definitely not 60lbs.
Yes that's the difference between theory and practise. Martin Spörries did a speed test with a 48" vs 52" Kaya (246 fps), both 60lbs. The 48 started to stack at full draw and had 90 lbs... Watch on YT....
Kaya 40lbs, (60lbs at 32) Handle 25mm, gets wider to 30mm then tapers to 18mm at the tip. WF 30lbs (42 at 33") more or less constant 23mm from handle to tip...
geoarcher wrote:JGH wrote:My White Feather seems to be straight, while my Kayas top limb is a bit to the right.... Kaya shoots a lot more consistent, needs less torque. Thought that might be due to the lower poundage, but could as well be that the Kaya is actually is a RH bow...
Sure, but regarding your Kaya, did you check for that before you started shooting it?
Not really, could also be due to shooting, don't know. Limb tips are narrower than WF, but lot wider close to the handle.. But I have seen several posts where people say that the string does not pass in the middle of the top limb....
The left and right bows have different strength points, so it is correct to use them separately. So our company produces the left and right arches separately. Many Thanks.
That's a translation of HMG reply ti the customers question....
My White Feather seems to be straight, while my Kayas top limb is a bit to the right.... Kaya shoots a lot more consistent, needs less torque. Thought that might be due to the lower poundage, but could as well be that the Kaya is actually is a RH bow...
Don't know if the Daylite Monarq is the same as the improved HMG. I don't think that they sell outside KR, as White Feather, Freddie and Daylite seem tk do a great job, at least for Europe. I would be interested if the WF forever carbon is the same as the improved HMG, means it has the HM carbon layer... or which of the other WF or Nomad models are based on the better HMG...
And a good translation of their texts on shooting would be great. The google translation is a bit.!?.!? /+%=
Try Chrome with automatic translation KR to GBR
Date 2019.09.23 the second one..
geoarcher wrote:JGH wrote:In the shop somebody was asking if there is a difference between RH and LH bows, this is their answer translated by google in my language... :
Der linke und der rechte Bogen haben unterschiedliche Stärkepunkte, daher ist es richtig, sie separat zu verwenden. Unser Unternehmen stellt also den linken und den rechten Bogen getrennt her. Vielen Dank.
Where in the shop is this exactly? It might translate in English better.
The 2nd link I posted, 3rd thread...
http://skybowsports.com/achery_base/
Here you can find texts on how to shoot correctly....
In the shop somebody was asking if there is a difference between RH and LH bows, this is their answer translated by google in my language... :
Der linke und der rechte Bogen haben unterschiedliche Stärkepunkte, daher ist es richtig, sie separat zu verwenden. Unser Unternehmen stellt also den linken und den rechten Bogen getrennt her. Vielen Dank.
No, I only found that page. If you look closer you will find that they offer 3 tyoes of bows in Korea. If you write them it would be great to get more infos...
You can also have a look in their shop. You can choose the bow length from 44 to 53", and biw weight in 1lbs steps plus RH/LH...
On their homepage is also a section on how to shoot a korean bow. Does not translate easily into my language, don't know if the english translation by google is a bit easier to understand...
geoarcher wrote:JGH wrote:Seems the discussion is going on, I hope it's ok for bluelake if I post that here. But others are also well known. I try to find later the post, where they explain RH/LH bows. Use google translate....
Producer of HMG, Nomad, Daylite, White Feather etc:
http://skybowsports.com/
The second link is their Naver online store, where people can ask questions on the products. I think in the second or 3rd question is about RH vs LH where Sky explains that they are different...
Thanks but where exactly on these pages does it explain that HMG bows have a 'Korean tiller' set in on them?
Seems the discussion is going on, I hope it's ok for bluelake if I post that here. But others are also well known. I try to find later the post, where they explain RH/LH bows. Use google translate....
Producer of HMG, Nomad, Daylite, White Feather etc:
http://skybowsports.com/
I did not see that at Freddies page, but on HMGs.... don't want to post that link here though, and it's only korean language translated by google..... Freddy does sell arrow rests, maybe thats why they offer RH/LH don't think that they offer different tiller versions...
Might be true for Hwarang/YMG but I have seen both Kaya and HMG offered in RH and LH on a korean website. On the HMG page they explain that they offer bows with sideways tiller.... but their export models like Daylite, Nomad and White Feather seem to be ambidextrous.....
I would really love to know how an original korean right hand tillered bow shoots vs all the ambidextrious export models that we can buy here in EU. Nobody around with some experience? I checked the arrows that shoot best with my WF 30lbs (42lbs at max draw) vs the dynamic spine calculator at 3riversarchery. By trial and error I found light 800 spine 4.2 gpi with 100 grain tips and 33" to shoot best. The above calculator comes to the exact same result. Just did a bareshaft test at 18m, arrow sticks absolutely straight in the gold of a 40cm field target with minimum handle torque.
I don't think that they use the arrow shelfs Freddie sells in Korea.... As far as I understand it the string is not in the middle, but a bit on the right side for RH bows.... So might be less of a problem with arrows slapping against the riser.
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