Tuesday, 19 May 2020

Avatar revisited

In continuation to my update of the archery review of Hunger Games, I decided to re-review James Cameron's Avatar, since that blog post had already got recent comments criticising my critique of it. I'm always glad that my blog posts stir comments, so keep them coming! Here it is for this time:

Avatar (James Cameron's)

This is a shortened version of the blog post from five years ago I did concerning archery on James Cameron's Avatar (2009). Nothing of importance is removed. You can read the original blog post here.



Avatar’s archery is depicted all wrong.

Mistakes:


  1. The beginners bow grip mistake, holding the arrow with an index finger. It keeps there without holding if you’re calm, and this only hurts your hand, damages the fletching of the arrow and can effect the flight of the missile.

  2. This string grip is reversed. The moviemakers apparently thought this would look more “alien” to us, but it looks stupid. It is impractical and unnecessarily hard form, which no bow hunting people (on which the Na’vi are based) have ever used on Earth, because it’s just not good. This hand just shouldn’t be upside down.

  3. The string should go here where this circle points, close to the face of the archer. Now the bow is way overdrawn, since the string is about half a meter back from the face. This makes aiming much more difficult, since the end of the arrow is not close to the archers eyes.

  4. The fletchings of arrows in this movie are made either from feathers, or from insect wings. That is not a mistake, since fletching can be made of different materials (although feathers would be best), but the number of feathers on these arrows are. Based on the screencaptures I can only see two feathers (or bug wings) in the arrows. An arrow needs three feathers in order to rotate around itself in three-dimensional space, after releasing of the missile. This rotation makes the aim more accurate, two feathers don’t do anything.

  5. The distance between bows arc and string, called fistmele or brace height, should be the length of the archers fist and a protruding thumb (thumbs-up-hand). This bow is way overcurved, since the fistmele is as long as Neytiris entire forearm! That is the reason behind the mistake in point 3. I’ve drawn there a longbow with good proportions for scale.

Some of the comments were disagreeing with my criticism, and here they are (some dissected into several parts for clarifying different arguments):

Freeyutube: "But using only two fingers should work fine also (we can read that medieval english archers used only 2 finger to draw their longbows)."

No, medieval English archers mainly used three fingers to draw their bows, not two. This is a popular misconception spread around in history books and populistic publications that do not check their sources. Most pictorial evidence from the middle ages show three fingered grips and there are historical sources to tell this is the way they shot. A powerful war bow benefits from the use of the third finger, and it would be disadvantageous to use two fingers to draw it.

Freeyutube: "And about using a "reversed grip" with the arrow on the usual side of the bow, the russian Seregedel's school shows it is feasible."

Yes, I've seen that video of Iza Privezenceva shooting with a reversed grip (which I will discuss in a separate blog post), but there has to be a reason why they didn't do it historically. There is close to zero evidence that this technique would've been used historically. If it was somehow better surely it would've been used at least somewhere. It is entirely possible to practise yourself to be good at this technique, but it doesn't mean it would be better technique than some other, or that it would've been used historically somewhere. I think this technique is heavily related to the use of back quiver, since it's difficult to draw arrows quickly from the back. Maybe the Russian woman use this technique to somewhat counterbalance the back quiver hindrance. When really the solution would be to use a hip quiver or when wanting to be extremely quick, to hold the arrows in the hand while shooting.

Matthew: "Just because you don’t like the way it looked and haven’t done your research, doesn’t mean that method wasn’t used. If you do your research you will find that several cultures throughout history have used this method for war and hunting. If you reverse everything in the picture to show right handed shooting you will see that the placement is a lot more correct then you realize."

I have done my research, thanks for asking. The reverse grip method is not well documented anywhere in the World. There are few sketchy pictorial pieces that might or might not depict that, and I will discuss them in a later blog post. If it was done somewhere historically, it must've been so insignificant an instance that we don't know much about it. More probably it wasn't done in any significant scale, since it's unintuitive and doesn't offer anything that a regular grip couldn't. If you know some evidence that reverse grip was indeed used by "several cultures throughout history" "for war and hunting" please show me the evidence. Pictures would be nice. But I don't think this evidence exists. If it does, I'm more than happy to correct myself. It's not that I would be preaching the ultimate truth, I just look at the evidence and make deductions based on that.

Matthew: "About the fletchings you say it needs 3 fletchings to fly properly but they only used 2 and that is completely native style, and the avatars are more like natives on steroids if you will. You are focused on the European style archery and are closed minded to other styles both historical and current."

It is indeed true that some arrows were made using only two feathers for their fletching. In worldwide scale this is really rare, but for example some native American peoples did use two fletched arrows, you are right in that. However their arrows are usually fletched a bit differently than the CGI ones used for Na'vi in the film. In Avatar, the two fletchings are straight opposite of each other, and form a flat surfice, they are not curved at all. When actual native Americans (for example Cherokee) did their arrows with the two-fletch style, they often curved the feathers helically around the arrow shaft, and/or formed the feathers very differently than this. I will make a blog post of those in the future too.
Arrows in Avatar have two fletchings, forming a two-dimensional plane. While this is possible to do and the arrows will fly of course when shot from a bow, it would be more beneficial to have either three fletchings, or the two fletchings turned helically around the arrowshaft like in the third picture, ot cut differently from the feathers like in the fourth picture. The photos represent some Native American (Cherokee) style fletchings.

Matthew: "You have drawn a longbow there but not all cultures used the longbow like the bow that the chief that have his bow to Navi when he died is similar to a horse bow there is even proof of some South American style bows made that way."

I only drew there a long bow, not meant to be "the English/Welsh/European Longbow". It is there only to show that the fistmele of the Na'vi bow is huge. But there I have actually made a mistake by looking at the picture. I thought five years ago that in this picture the bow in undrawn. But now when I look it closer I see that the arrow is on the string and while Neytiri doesn't draw the arrow and string back with her string hand, the bow is still drawn to a degree, and she just holds the arrow there with her bow hand. This can be seen by the fact that the bowstring makes an angle at the arrow nock, which I didn't notice before. This unproves my criticism of the too big fistmele, since we can see from other pictures that the fistmele in this bow is in the limits of possibility.
Upon closer inspection I noticed that the bow is in a semi-drawn position, the string making an angle at the nock of the arrow (strengthened with a red line).


But now when inspecting the bow again, I want to talk about another point regarding to it. This is the ceremonial bow of the Na'vi, owned by Neytiris father, until she inherited it from him. It is different from the regular Na'vi bows by the fact that it has these blue blade-like objects stuck in it. From the picture above you can see that the bow limbs are bifurcated so that the blade-part goes between the halves of the limb. The bowstring is then split into two near it's end and both ends are attached to the bifurcated bow limbs.

This design is absolutely ridiculous. There is no point of making a bow like this. It might look cool to some modern viewers, but this whole construction would make the bow weaker both in shooting power and in integral strength. Also a lot heavier with those large blades, and more cumbersome and difficult to carry around. I admit it's a ceremonial bow, but it's been seen used for shooting in the film, so it is clearly also intended for hunting/combat, not just as decoration.

There's a reason blades were never attached into bows. Bows are delicated weapons, if they are used to hit things they might break. That's why archers usually had a back-up weapon in case they got into close combat or otherwise couldn't use their bow anymore. In Europe that usually was a sword, dagger or an axe, could've been something else in pre-Columbian America, on which the Na'vi are based. Anyway, nobody in history used their bows to hit things, since the bows could break, and there were more useful things to hit people with than bows. So blades were never attached to bows anywhere in the world.

Integrating these huge blades in the centre-line of the bow has resulted in the bow limbs being cut in hald, since they have to bend and travel through the blades. That makes the bow limbs structurally weaker, they might break more easily, and it also diminishes the power of the bow. Attaching the string becomes extra hard, since it has four nocking points instead of just two, and a bowstring needs to de detached when the bow is not used, since otherwise it will strain the power out of the bow in the long run.

So, I like to present the updated version of my criticism of the archery in Avatar as follows:

Mistakes and updates:


  1. The beginners bow grip mistake, holding the arrow with an index finger. It keeps there without holding if you’re calm, and this only hurts your hand, damages the fletching of the arrow and can effect the flight of the missile.

  2. This string grip is reversed. The moviemakers apparently thought this would look more “alien” to us. It is unintuitive and unnecessary form, without much precedence in the real history of the World, although some modern archers have emplyed this technique more or less succesfully.

  3. I originally draw this circle here to point where the arrow is traditionally drawn. However an overdraw isn't always a mistake, and longer arrows can indeed be "overdrawn". Neither does the anchor point of the arrow be near the eyes, it can really be anywhere.

  4. The fletchings of arrows in this movie are made either from feathers, or from insect wings. That is not a mistake, since fletching can be made of different materials (although feathers would be best), but the number of feathers on these arrows is unusual. Based on the screencaptures I can only see two feathers (or bug wings) in the arrows. Most arrows have three feathers giving it a good spin. This rotation makes the aim more accurate. Two-feathered arrows however do occur in the real World, but they are rare and often times contructed differently than these.

  5. The distance between bows arc and string, called fistmele or brace height, should be the length of the archers fist and a protruding thumb (thumbs-up-hand) for a longbow. For recurve bows this can be greater. I originally misinterpreted the image so that I though the fistmele was way too big. It's actually not.
  6. The Na'ci ceremonial bow has huge blades stuck right in the middle axis of it, splitting the bow limbs in half. This design, while it might look cool, is highly impractical and dminishes both the bows integral strength and it's shooting power. There is no reason anybody (human or alien) would ever construct a bow like this.

With this I will close this case for now. Have a nice day everybody and thanks for your comments!

4 comments :

  1. Mate, what an analysis!
    I know almost nothing about archery, and only wanted to share my limited experience about the grip. I have four fingers in my left arm, have a limited extension of it, around 85%-90% of the 180 degrees, and a half rotation of my wrist outwards. I've tried a few times to shoot with a bow, and the normal technique doesn't fit my physical structure, I can't hold the bow with my left hand, nor pull with my right arm holding the bow with my left hand. So, I'm forced to hold the bow with right arm, and pull the string with the left arm. Mostly due to the wrist rotation limitation I can't pull the string with the string on the inside of the hand, and have to do it in the movie style because it helps me draw with more strentgh. So yeah, I basically shoot like the Na'vis...
    Considering the fact that they should have the full range of movement, which I don't have, they should only mirror the usual techniques as left handed.
    Again, I know nothing about archery, and maybe I need a teacher to shoot properly with my odd shaped arm. Again and thanks for the breakdown! :)

    ReplyDelete
    Replies
    1. Thank you mate!
      And thanks for sharing your own experience, it is very illuminating to me.
      It is always good to have an instructor in archery, you should definitely get one!

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  2. Regarding the fletching issue - I'm no archer, so I can't really wrap my head around the concept of how Pandora's atmosphere would affect the flight of an arrow. I do shoot rifles at long range - and the low gravity (pandora is a smaller less dense body than earth) and extremely dense atmosphere (that's not "air" as we know it they are walking through) would absolutely effect the shape and overall design of a projectile intended for use out of a firearm to be used there for precision shooting. I would expect the same for an arrow? Perhaps the thicker,denser air allows for the two fletchings to be accurate and minimizes drag? Plus the lower gravity would allow for a "flatter" trajectory than we would normally observe on earth.
    Or it was done for rule of cool... and wouldn't work... like i said im not an archer.

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  3. I know this is an older thread, but regarding the two-fletch issue: the steering correction offered by arrow fletching is based far more on air resistance than on rotation. Rotation is more of a concept applicable to bullets, as they spin so fast that they create gyroscopic forces that stabilize the flight.

    Arrows spin far, far slower. What the fletching actually does is provide air resistance, preventing the back end of the arrow from severely tilting in flight, keeping it more or less in line with the front end. If we shoot an arrow without fletching, and don't have perfect release and spine or nock height, we will see some sort of tilting occur, depending on what the errors are. Spine mismatches cause sideway tilting, nock point placement errors cause up or down tilting. If you've seen the trick shot videos of people curving arrows AROUND trees or other objects, they're creating very extreme examples of those tuning imbalances on purpose. But the basic tilting/curving flight phenomenon is familiar to anyone who has bare shaft tuned their arrows.

    Now, regarding two fletching: the amount of air resistance required to stabilize the back end of an arrow varies depending on how well tuned it is to the bow. In some cases, it's actually little to none. But how it's distributed (two fletch, three fletch, four fletch, tall feathers, short feathers, long feathers, plus or minus helical etc) isn't as critical as this post makes it out to be (unless there is too much contact with the arrow pass). I have shot two feathered arrows with no helical and gotten great flight. I've ripped feathers off of three fletched arrows, and also shot them with no issue.

    In spite of other obvious problems with na'avi archery, their fletching looks fine. Two long tall feathers gives a decent amount of steering correction. I'd gladly shoot that set up without complaint.

    ReplyDelete