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Gpang788,
My mistake for not defining my terms. An oscillation can refer to a single wave in a series or the whole series of a single frequency. I meant the latter. I think there are two superimposed frequencies of oscillation being traced by the lit nock in a single flight in my photo. The longer frequency oscillation is due to the phenomenon that causes the archer’s paradox. When a long flexible shaft is propelled by a force from the rear its first reaction will be to flex as the front resists moving while the rear accelerates forward. This is most easily seen in the atlatl, the predecessor to the arrow.  See < http://www.youtube.com/watch?v=BkK2vEZ5bTk >. This is especially true when the front and rear are not in perfect alignment with the force applied. That oscillation is drawn as wave form #1.  The second oscillation is a higher frequency waveform which I believe is caused by the thumb release. The string escapes more quickly than the thumb can move itself out of the way and so goes around the thumb to some extent. That causes a second rhythmic sideways displacement as seen here. <  http://www.youtube.com/watch?v=96KGWC0PB6s > This sideways frequency is higher with more waves put into the arrow. Watch the string ‘s sideways movement closely. This I think corresponds to the drawn waveform #2 in my photo. If you put both waveforms into one line it would look like a string of W’s and M’s rather than a simple sine wave. That’s the pattern in the path the lit nock draws.

Gpang788,
Ha ha, all nocks should be lit! I shoot at dusk because I have a long commute to get home and I never have much sunlight left. In the dimming light I can see exactly how my arrows are flying and where they hit. I can't tell you how many arrows I've recovered  buried  in the grass  that I never would have found if their nocks weren't looking like little glow worms in the thatch. The lit nocks are expensive now but the prices will come down because they are LED's and that industry is moving forward quickly.

This technique won't correct bad or inconsistent form but your  arrows will fly straighter to their random destinations.

I've been shooting the 45#@28" Hwarang for about a year now with incorrectly spined arrows. At 30 m I can put most of my arrows in an 8 inch diameter paper plate stuck to a straw bale with three chopsticks. Just barely, thanks to the fletching. But the arrows often stick out at slightly different angles. I didn't notice this until I started using blunt tips. With points the arrows went all the way through the bale to hide in the grass. The arrows are correctly spined for my 70 lb bow. That one is hard to twist but I don't need to because the spine corrects for the off center arrow rest. With the two twists, rotary and vertical on the 45 Lb bow the arrows shoot correctly out of both bows.

With the 45 lb bow I grip mildly hard but the bow limbs are easy to twist. Same with the vertical tilt forward. Like Storm indicated the pressure has to be exactly the right amount and be consistent with each shot. Too much or too little rotary pressure would not correctly align the tip to nock arrow flight. Too much top to bottom pressure seems to make the arrow dive. I've only nailed it a few times out of many dozens of shots. I think this will take months of daily practice to get it to work consistently. And it will be different for each bow. It doesn't work well on the Salukis. They are designed not to allow limb twist.

I've often wondered why the Hwarang bows, as long as they've been around are still made to be unforgiving bows. Several reviews have mentioned that. Now I think they are made that way so advanced archers can apply tweaks in the draw if they have taken the time to learn to do that.

Storm,
This is an intriguing idea. It does seems to me the only way one could hope to apply torque quickly enough to affect the arrow as it leaves the bow is to pre-apply it in the grip. I notice  your shooter in the video is holding his hand in a knuckles forward position as if throwing a punch. That takes a good deal more strength to hold the bow during the draw than letting it rest in the cup of the hand. But it would pre-apply torque that would be released with connective tissue in your hand snapping back much more quickly than you could manage with conscious muscle movement. Excellent video.

Either you're practicing some extreme string walking or your nock point is a bit high. It doesn't look like you're using the bottom limb at all. Do you have any photos of you at full draw?

Saluki 47lb@28" pic

Crazybamboo,
If the Kaya is 60# at 31" then it is less than 50 # @28".  If you could draw each bow back to 28 inches  the Hwarang would be much much faster than the Kaya because it will have more than 20 lbs additional force to impart to the arrow. Even if the two bows had the same draw weight the Hwarang is likely to be a bit faster because it is a better made bow. That being said if you are an adult male of average size and strength who is new to archery it is unlikely you could pull that 70# Hwarang comfortably to 28 inches.  The Kaya should be more than fast enough for anything you want to do especially if your goal is to perfect your form which will lead to both speed and accuracy. In fact if you are new to this type of archery most experienced archers would recommend you start with a 35# to 40 # @28 ".

Storm,
The 70lb Saluki is a 50 inch Turkish Hybrid. The Saluki hybrids vary in materials but this one uses two laminations of bamboo as a limb core, and black fiberglass backing. Lukas Novotny , the bowyer , wouldn't tell me what the belly material was as he prefers to keep that proprietary but it is not horn. It seems to be a type of fiberglass but not the same as the backing. Novotny was a glassblower before he became the Saluki Company so he may have access to exotic glass based materials or may have developed his own compression resistant flexible glass. He only said it took him a long time to get to this material. He also said he's developed some new material that is even better and is experimenting with it now.  The handle is Osage Orange with white faux inlay. The siyah core is maple. What ever he uses, the bow limbs bend the same  no matter how you try to torque or  press high or low on the handle while drawing. It's amazing how stable this thing is.

Storm,
Thank you for the comprehensive and very informative reply. The force draw curve you linked to does indeed tell the story.  The empirical curve (thick line) for the 50 lb bow appears to be absent but since the mathematical and empirical curves for the other five bows appear to be identical per bow it’s safe to assume the mathematical curve for the 50 lb bow will suffice for comparison. It shows force by the string increased toward the beginning of the draw on the longer bow while at full draw (and beyond) the draw force is the same  compared to the shorter bow. Concentrating the force toward the front of the draw is exactly what a compound bow does with cams and cables. There’s a lot more to think about and be written here but as you wrote this should be a separate topic. I don’t want to hijack this space from the original poster.
Cheers,
Tonygt19

Does any commercial archery company make arrows spined for a 90 to 100 lb traditional bow anymore? I've heard Easton used to make aluminum shafts for very high weight bows but the market now is probably miniscule. I've also heard of individuals slipping a thin weaker spined shaft into a larger diameter heavy spined shaft to combine their stiffness for very heavy bows. Anyone experienced with that?
Cheers,
Tonygt19

Thomas,
Maybe I'm remembering wrong. I was thinking YMG does use real bark on their bows but limits their Hwarangs to 70 lbs. These are the ones you normally sell, is that correct? They come without markings which is forgivable given their awesome performance. I was assuming Warbow made the point of real bark because he had gotten SMG which seems to have a broader spectrum of bows to put real bark on this special order. I probably read too much into the remark, if so mea culpa.
BTW the 70 pounder I recently bought from you is a monster. It punches a blunt hunting tip on a  carbon tech arrow entirely through a straw bale. Difficult to use on the horse though. Not used to the weight yet.
It does seem to have a slight off tiller toward the arrow which apparently does not affect the performance. This slight off tiller thing is an intriguing concept which gets mention in Karpowitz's book on Ottoman Turkish bows as well as in this forum. Why do the bowmakers do it? Does it compensate for string oscillation caused by the thumb release?
Cheers,
Tony

is that 40 at 28"
Is it tillered for right handed thumbring draw only?