Primitive Archer
Main Discussion Area => Bows => Topic started by: backtowood B2W on May 08, 2022, 12:59:12 pm
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I made two sinew backed bows this winter. My firsts.
This floor tillered bow was sitting in the warm box almost 3 years. Finally I could motivate myself for a sinew backing.Also the recurves was some kind of first with boiling them with form in a big pot! Worked out (ok - not exactly symmetrical, but good enough) although didn't do this again as there are easier ways to do it.
Also heat treated, and tapered cross section before sinewing. Very nice piece, no knots and very straight. Thought to make a bow for thump shooting with a draw of 30" at least, but the heat treated wood became so thin, I decided to go for a shorter draw.
The sinew covers only the back and not the tapered sides, which transforms to rectangular outwards.
The total flat belly turned convex as the sinew dried, so I guess the back is flat now and only the sinew creates the crown. So, this resulted in a very even thickness of wood. It also gained about 2" reflex - lost in tillering...The bow looks pretty much the same now like before sinewing.
So now she has 2" of backset which returns to 2 3/8" when resting.
It is bending just a tiny bit in the grip, which is Ishi inspired.
The levers are inspiried by Korean hornbows. I think they can be made in a very light construction but string alignment is not 100% so I didn't risk. And its fast enough anyway - don't have fps but its for sure one of my faster bows :OK
String bridges are made of buffalo horn - also the nocks.
The snake skin is a blue tree python. the white scales reminded me to the Milky Way - so she got her name. It was a hard job to dress her up as the skin had a pronounced ridge where the snakes spine was.
Handle is just wrapped with a soft buck skin leather.
Ok, enjoy the pics, at least I did - it was a hard pic.
As always, critics are also welcome - that's my first sinew bow and there is always something which could have been done better.
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damn what5 a great bow - simply awsome
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The draw is very nice. poundage rises about 3# per inch in the beginning of draw, around 2# in the take off from the strings from the bridges.
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Thank you rowan bows, yours are also very nice!!
but more to come
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The bow is up side down in this FD!!
Correct one is further down!
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Holy molle! What a nice bow. Loves the lever design. For you first sinew job I’d say you nailed it. Well done.
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Impressive bows. Useful descriptions. Thanks.
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Absolutely stunning all around!
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Thank you guys.
I just wanted to make her a new string of 452x and recognized the the leather strip was on the wrong side.
So that means the bow in the fd pic is up side down!! :o.
Sorry for that, I will make new ones when my boy come home...
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Very nice detailed work on your bow.A lot of time devoted to this one and it shows.Good intermixing of styles.Good width on the inner limbs to maintain less set with power.
Your getting the mantra down right for a better efficient bow.
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What a great looking bow! The skins really set it off. Excellent work!!
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Very nice detailed work on your bow.A lot of time devoted to this one and it shows.Good intermixing of styles.Good width on the inner limbs to maintain less set with power.
Your getting the mantra down right for a better efficient bow.
Thank you Ed ,glad you like it! Width max. is 2 1/8", and tapers pyramidical to 1 5/16" at the shoulder.
Thank you smoke, I have another one like this and one rock python, time will tell when I will stick them to another sinew bow.
OK, FD - update this is the correct one, don't know how I could mess this up :fp
also a half draw pic when the string takes off. The brush nock like string bridge also works out as string holder - which is a nice feature and happened by accident - didn't plan this...
Ah and I found some older pics from the boiling set up and heat treatment. The HT set up is bit dangerous but worked out. An enclosed heater is for sure the saver way!!!
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One thing I also forgot I made 3 layers of sinew of about 50 Gramm in total. and take off of the string at 17"
Total mass is 517Gramms. The new string is made like Simons make them - 452X - nice stuff, only 6 strands!
Thanks for looking!
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this Idea is simply awsome. As I said awsome bow, never seen something like this before. The lever shape is so beautiful and I very curious about weight reducement to the levers. also ash has often the problem that the recurves go back again but this (Id like to say architectural genius strike) sure gives some sability. The grates point in design I think is the fish skin + the lever shape - man it looks like a sting ray. awsome job dude!!!
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WOW!
Making a beautiful, perfectly tillered recurved sinew was boring for you, so you carved these unique recurves to have low mass And stability!
A bow more than words could praise.
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Just beautiful, fantastic job
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Just a spectacular looking bow. Love it.
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+1 for WOW!
A masterpiece for sure.
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IMHO, this is the most fascinating and impressive bow I have seen posted on this site. Just a wonderful job all the way around and I'm really intrigued at the way this community is pushing the frontiers of wood bow construction.
Matt
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Absolutely beautiful
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Beautiful bow, very nice in all aspects. :)
Pappy
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sincere felicitations Martin - what a wonderful bow - you definitly surpassed yourself! please invest these 50€ and get a subscription again - there's good chance for bow of the year I would say - even if it's only May now (-S
these levers for sure are very special on a bow like this. these combined with the long ears of the string will definitly lead to a special fdc with very high early drawweight until the string lifts of - as you described. these long ears will also make the bow more stable and...the long ears also allow a shorter string than it would need with short ears. I have studied this topic with my bows a little. very interesting! wish you and your family all the best! thanx for showing
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Man I'm wearing the mouse wheel out just by switching from one picture to another
such a beauty !!
those levers are really something and the overall impression is awesome :OK
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Thank you for the nice words!!
this Idea is simply awsome. As I said awsome bow, never seen something like this before. The lever shape is so beautiful and I very curious about weight reducement to the levers. also ash has often the problem that the recurves go back again but this (Id like to say architectural genius strike) sure gives some sability. The grates point in design I think is the fish skin + the lever shape - man it looks like a sting ray. awsome job dude!!!
Thank you rowan bows - needed some time to see the stingray in her - would have been a cool name too. And that's not a fish skin its snakeskin - Morelia viridis - just blue. Google it and you will see why it was a pain in the @§§ to dress her up. They are more triangular shaped than round.
sincere felicitations Martin - what a wonderful bow - you definitly surpassed yourself! please invest these 50€ and get a subscription again - there's good chance for bow of the year I would say - even if it's only May now (-S
these levers for sure are very special on a bow like this. these combined with the long ears of the string will definitly lead to a special fdc with very high early drawweight until the string lifts of - as you described. these long ears will also make the bow more stable and...the long ears also allow a shorter string than it would need with short ears. I have studied this topic with my bows a little. very interesting! wish you and your family all the best! thanx for showing
Thank you Simon! I also recognized the shorter string. I thought it came from the bridges which increase brace height too, but yes the loop goes straight to the bridge and not on the recurve belly. OK, I subscribed again - would be cool to have this mystery hat 8) and I miss the mag too.
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So glad to hear you subscribed again.
The whole while I was looking at the pictures I was thinking we were going to have to take up a collection, because both of those bows deserve a vote.
Very nice B2W
Bjrogg
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Gosh! So far the most beautiful bow I've seen on here.
I'm still using drawknife the majority of my build, what tool(s) did you use to carve your unique recurves?
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Thank you bjrogg and blink.
Gosh! So far the most beautiful bow I've seen on here.
I'm still using drawknife the majority of my build, what tool(s) did you use to carve your unique recurves?
I used a half round chisel (10 and 6 mm) for the roughing out. smoothening the surface with a card scraper. Closer to dimension I used the card scraper - which I made myself - a piece of Spring steel with 4 different little radius in the corners and some key files and chainsaw file.
I will try to take a pic of that tools...
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Really nice bow. well done.
You could probably lose a fair bit of weight at the recurves. Anything handle side of the string contact point could be working limb. If you look at the thinnest point of the working limb and make your recurve a fraction thicker than than point. That is all the thickness you nee to stop them bending.
you could probably have added a little more reflex when the sinew was drying but thats about it!
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you could probably leave it as is,,and it would be perfect,, great work,, :)
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Great looking bow! The name of the bow is perfect. I can tell you put a lot of time and effort into every detail of this bow. Thanks for showing it to us.
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Really nice bow. well done.
You could probably lose a fair bit of weight at the recurves. Anything handle side of the string contact point could be working limb. If you look at the thinnest point of the working limb and make your recurve a fraction thicker than than point. That is all the thickness you nee to stop them bending.
you could probably have added a little more reflex when the sinew was drying but thats about it!
thank you bownarra, I agree in all points. I also should have made it thinner or a deeper heat treatment. I wanted a draw of 30 but that's about it ;D. I will leave the recurves for now, when I have more under my belt, that's my first sinew baked bow!, I will probably slim the levers.
Thank you bradsmith and WillB