Well folk´s! If some of you are specialist´s, I would like to hear your oppinion! Out of this I can calculate that this bow is shooting around 140 fps at 10 gpp. Is that OK for a simple selfbow like this??

@matthias7522

4 жыл бұрын

Hi, I am absolutely not an expert, but on this chanel Clay Hayes makes a lot of selfbows and hunts with them. He talks about design / speed and so on. Backing his bows with sinew I believe, to make them much faster. kzread.info Here about speed of selfbows, By the way, I like your bow! kzread.info/dash/bejne/gJaoo9SnmpnMp7A.html

@peterjuulsgaard

4 жыл бұрын

old shard yes I already follow Clay Hayes! And that’s actually also one of the reasons I ask. See Clay is pulling about 29” with his bows, and I only pulling 27” and my arrow weighs 627 grain, and Clay doesen’t mention What his arrow weighs in that particular video. These are huge factors! However, there is no doubt that Clay’s bow, or lets say all Clay’s bows are faster, cause his a Pro bowyer. Thanks for watching, and I’m glad you like my bow😊

@matthias7522

4 жыл бұрын

@@peterjuulsgaard Keep in mind that besides the longer draw and unknow arrow weight, all bows that I have seen on his chanel have at least a little bit recurved tips. I think for a wood longbow your bow is very fast.

@peterjuulsgaard

4 жыл бұрын

Yeah I admire Clay’s bowbuilding! And he’s channel too.

@eliotarmory7085

4 жыл бұрын

Peter, 140 fps at 10 gpp is not too bad. For a simple wood bow it is about average for what can be expected from a selfbow. Adding reflex, heat treating, and backings can all be used in your favor to gain speeds. Your off to a great start so far 👍🏻

Falling into these old videos is great fun and a true reward. You are a good man and He is pleased with you. Amen, Rick

@peterjuulsgaard

Жыл бұрын

Im glad your entertained

Good luck to you on the upcoming season Peter. I ordered a new longbow today and now I have to wait for delivery. I hope to have success with it on a pronghorn antelope and white tail or mule deer this fall.

@peterjuulsgaard

4 жыл бұрын

Thanks! And good luck to you!

Peter, your bow looks gorgeous. If your primary concern is with increasing the efficiency so that lighter arrows can be used with greater cast while maintaining the 40 Joule requirement, then perhaps it is worth noting that the limb width ratio could be further increased so that the taper-to-zero condition is more closely approached. This could be accomplished by widening the limb at the base and narrowing it at the tips. Since most of the strain energy is stored closer to the base of the limbs where they are wider, the draw weight is very sensitive to width changes at the base, but not so much to width changes at the tip. However, the efficiency of the bow is very sensitive to the width of the tip since that is where the limb is traveling fastest. I think it is perfectly feasible to obtain 160 fps with 10 gpp from a pyramid self bow at 27 inches. Perhaps another variable to play with is shortening the brace height to increase the power stroke distance. Shortening the brace height by one inch could be the equivalent of gaining one inch of draw length in terms of arrow energy.

well but looks like you got really good form and technique to get the consistent shots that you're getting on your chronograph great job great video

@peterjuulsgaard

2 жыл бұрын

Thanks

What weight will you try to achieve on the new bow Peter......I would of thought the ash bow would be faster at 65 lbs but a guess it isn't backed ..Turkey season opens up in another week, I can't wait. Good luck with the new self bow. Thanks for your time.

@peterjuulsgaard

4 жыл бұрын

Thanks Tim, and good luck with the tyrkey’s! I’ll try to get a little better performance out of the elm bow. Aiming for around 60# but hopefully a little faster than the ash bow

I have made the same design in red oak 66" total with a linen backing pulls 53 at 28 (my draw length). I shoot 10 to 12 gpp arrows. While I dont have a chronograph to tell my arrows to the ear and eye arent slow. But what's more important is the bow is almost dead silent. With such heavy arrows theres not much energy left in limbs and string to make noise. And if what you're shooting at cant her the bow it's just another point in your favor. Love your channel, please do keep up the good content and best of luck in the woods.

@peterjuulsgaard

4 жыл бұрын

Agreed on all count’s! Thanks for watching.

Excellent video as usual Peter. I absolutely love the stain on that bow, it almost looks like Yew wood. This year I’m using a 70# fiberglass reflex bow that was made about 60 years ago by an American company called Paul Bunyan. I’m about to add a rattlesnake skin backing to it, perhaps you could add a bit of strength to that bow with a backing. By the way, do you know what FOC percentage you’re shooting with those arrows? Thanks.

@peterjuulsgaard

4 жыл бұрын

Thanks! I’m gonna ad some backing on the new project! I’m at 25+% on this arrow

fine craftsmanship

@peterjuulsgaard

4 жыл бұрын

Thanks!

I doubt that you would get much more speed from a laminated bow of this design. It is excellent for a caveman bow! :)

@peterjuulsgaard

4 жыл бұрын

I actually chronographed it back in 2018 when I made it, and it have lost a little speed since. But I also used it the whole summer season that year, and shot it daily. so probably no wonder! Thanks buddy

Did you ever post a diagram with the Ash bows dimensions. I have a couple of Ash staves that are drying, both about 2m long and it would be great to make a sort of copy of your one.

@peterjuulsgaard

4 жыл бұрын

No I didn’t post drawings, because I didn’t use any. But the bow on page 4 in the bottom is fairly the one I made. The tekst is in Danish but there is some measurements to use. bueogpil.dk.web18.redhost.dk/wp/wp-content/uploads/2016/04/Lav-din-egen-langbue.pdf

@russellatterbury8131

4 жыл бұрын

@@peterjuulsgaard Hiya Peter, I have just split the straightest piece of Ash i was hoping to make a bow from. But the grain inside is anything but straight, it snakes up the whole 2 metres. Can you tell me if this is normal for Ash?

@peterjuulsgaard

4 жыл бұрын

russell atterbury well I’m no specialist! But I Think it have something to do with How it was growing, which surroundings and so

I like longbows alot I made one like that couple years ago out of rock maple, I got to shoot 148 to 150 , I backed with rawhide , ,very nice how Peter, I just started one making it from Osage orange

@peterjuulsgaard

4 жыл бұрын

jessie garcia Thank you sir.

I like that you carefully use many decimals in your calculation when your using a rule-of-thumb to calculate the velocity in m/s. Deviding the fps with 3,33 is more easy to remember but the actual number should be 3,28. That means that your arrowspeed is 45,11 m/s and that your arrow delivers 41,3 Joules. Plenty of head-room, Peter.

@peterjuulsgaard

4 жыл бұрын

Hehe! Yes and I’m always using 3.33 to be on the safe side💪 thanks for watching, and input.

Det hadde hvert veldig kult å se en Holmegård eller Mollegabet i en slik test😊. Liker veldig godt filmene dine og venter forsatt på den dagen vi kan jakte med bue i Norge. 👍

@peterjuulsgaard

4 жыл бұрын

Karl Anton Lillesæter takk! Jeg håber i får lov en dag🏹

Like amigo 👍🏻

I think 140fps is a bit slower regardless how much the momentum it produced with heavier arrow. It may effective for short range within 10yds. I always compensate a little less arrow weight with higher foc to get a little higher fps to avoid the deer jump the string. Its still can produce the same momentum. For example, if you can increase to 160fps with 540gn arrow, its still can produce 40joules. Anyway.. nice shooting review.. Happy hunting..

@peterjuulsgaard

4 жыл бұрын

Hbadri Outdoors Thanks! I actually shot one deer with this bow, with no problem. And it was at about 8-10 meters, with a pass through.

@hbadrioutdoors5557

4 жыл бұрын

@@peterjuulsgaard Yes.. it is effective within that range.. keep it up..

@peterjuulsgaard

4 жыл бұрын

Hbadri Outdoors but I actually Think that I’ll drop a little arrow weight like you say, though!

Raising the arrow weight will likely slow the arrow speed, it won't necessarily equate to the same joules. Not a criticism just an observation. I really enjoy your videos thank you.

@peterjuulsgaard

4 жыл бұрын

It will slow it down, but this bow design, favors a heavy arrow, over a lighter one. So I know I’ll get a joule or so, by adding weight to the arrow. Thanks for watching and the support!

@craighammond6645

4 жыл бұрын

@@peterjuulsgaard you could steam and bend a slight reflex deflex into the bow limbs to increase speed. And maybe a fastflight string. Or experiment with the bow your building.

@peterjuulsgaard

4 жыл бұрын

craig hammond yes I will try to implement the reflex design into the new project.

I have a keen interest in bowmaking and bow efficiency for many years, but alas, I have yet to make my first bow. I live in a smaller flat, and I have no place for making bows. This bow doesn't seem like a real Holmegaard to me yet; although it is not a bad bow, and I like it very much. Holmegaard design has a much narrower but thicker and stiffer outer limb. This makes outer limb have a lower mass, that is one reason for greater than average speed of a straight stave bow. Some bowyers argue, that mass placement in the limb (forward profile) can be more decisive factor in providing speed, than side profile of the bow, when using same materials, or materials of similar elastic modulus. This mass principle was rediscovered recently by analyzing Holmegaard design. The other is, that a stiff but light outer limb works like a lever, similar to recurve syahs, to exert force on a relatively short working flat part of the limb, and of course arrow after release. Then it works like atlatl: a lever, which multiplies velocity at the same force (draw weight). This gives such a bow also smooth draw and less handshock, and contributes of course to speed. But real Holmegaard has a forward profile of the limb much more similar to Eiffel Tower shape. Wide working limbs, and very narrow, but thicker outer limbs. I have seen such self bows, when I went on a 3d traditional only competition in Austria. I had an opportunity to try one of them; extremely well made. It was faster then my modern laminate longbow reinforced with carbon for a 3-4 feet. We used my arrow. Wooden, probably heavier one, (normally I can not come under 10gn pp with my woodies, average even 11, 12 gn pp) as my arrows get heavy because of needed spine. Self bow was 50#@28", mine was 52! The bow was around 165 fps, going to 170. It's worth mentioning, that original Holmegaard had a reversed handle; which makes that 9000 years old invention. The practical wisdom of ancient bowyers was immense, it seems. I'm sure, that you know this design well, but knowing one and being able to make one is not allways the same; it demands much more work, then easier designs and is more risky even for experienced bowyers. I wish you much luck in making a new bow, I'm sure it will be even better than this one! Best regards, A.T.

@SeadartVSG

4 жыл бұрын

I think you are blending some facts about the mollegabet bow designs with holmegaard bows that appear a lot on the internet; there are very accurate published dimensions of the holmegaard bow and you can visit the bow in person in the Danish National museum and the limbs are not as you describe. There is a lot of wrong information about these bows that came from the original bowyers bible, including the statement that it's a reversed handle. Get the dimensions and make your own bow then decide.

@peterjuulsgaard

4 жыл бұрын

Well I learned about these bows already in the smaller grades, so one should probably Think that I’m the one who should be pickey about the right design’s here! Afterall I am the Dane😆! But I’m not pickey! Because when I’m building a bow like this I’m building it as I go, and I’m not using drawings and mesurements from books and museums! However! this desigh is made as close that I could get to “as I go” the one found in the swamp of Holmegaard! I also have a sightwindow, with an arrow shelf. The original was shot of the hand, and was made out of elm. This one is ash. The design you are reffering to has static limb tips, and was found at Møllegabet in Denmark and both these design’s are carbon dated to around 7000 BC. If its possible to shoot 160 fps. With 10 gpp with an all wood bow at 27” of drawlenght, I will never Pick up a glassbow again😉 Thanks for your comment!

@AnimaTriste

4 жыл бұрын

@@peterjuulsgaard One learns until the last day. I'm glad that I made this comment, as I got new information, which I will research further. Thank you both, Peter and Seadart, to clarify this. Of course I believe a true Dane more! I got my data only from bowyers bible about Holmegaard design, so I can imagine that something could be wrong, as in my mind, Americans are not the most clever people in general on the world. Quite the contrary. But, the bow I tested myself. We could shoot it through the chrono, because there was also bow fair. You can believe me, or not, I don't care. 😉 Arrow could not weigh under 500 gn, no wooden arrow of mine NEVER EVER does, even if I try as hard as I can. I could never get a shaft under 400gn here. I could never shoot weaker than 400 spine from any bow, that I had.A raw shaft. Made arrow, with a point, lack, feathers and nock....I make my own wooden arrows, always. But, this is really, but really not so unusual. There are not just data from a Mojam in bowyers bible, volume 4, which are documented, but others. I predict, that you will have a hard time not to touch a glass bow again, as you discover that.😂😂😂 Still, remaining your friend, A.T.

@peterjuulsgaard

4 жыл бұрын

Anima Triste I’m not discovering that at 27” of drawlenght! We have to calculate all the dark Numbers also. I have the selfbow I made last year. The one with the snake skin! It’s around 50 pounds at 28”. That bow can shoot around 160 fps with 10gpp. But not at 27” of drawlenght. See! Lets say we have a bow at 40 pounds at a drawlenght at 27”. This bow will shoot lets say 170 fps. With a 400 grain arrow, which is 10gpp. Now lets say we have the same brand/type of bow but this bow is 40 pounds at 29 inches of drawlenght. No difference in pounds, only in drawlenght! Ok? This bow will shoot 190 fps with a 400 grain arrow, which is 10gpp. Those two archers are both pulling 40 pounds, but the speed is sicnificant different! A rule of a thump says that 1” of drawlenght increases speed by about 10 fps. With the same drawweight. Thats why I’m so impressed with 160 fps with a bow of pure wood, at 27” of drawlenght. Make no mistake! My bows can shoot 160 fps as well, if I draw a few inches longer or if I suddently got a longer drawlenght. But you are probably right! I will have a hard time not to touch a glass bow again if it should happen. Drawlenght is the biggest factor in arrowspeed.

@AnimaTriste

4 жыл бұрын

@@peterjuulsgaard You're probably right. The number 27 somehow passed my eyes, even if it was there all the time.😷😂😂😂 Maybe I got Corona, and the lack of oxygen in my brains is starting to show. You see, it's difficult to judge how tall you are from the videos, and I have been admiring your shooting technique now for a long time. I don't see any short draws ever, and even if I remember that you often mentioned that your drav is 27, I constantly forget. All the same, I wish you, that you find a wood bow, that would do that. And maybe try to hold your word, even for a month or two. 😂😂😂

Nice bows!! Did u tried Hazelwood??

@peterjuulsgaard

4 жыл бұрын

Cr3t2u David yes but I dont get hazel to perform as well as elm and ash.

@cretudavid8622

4 жыл бұрын

@@peterjuulsgaard OK, thanks for the information! I have a Hazelnut stave that I am working on right now for a beginner Bowyer like me it will do the job:)

@peterjuulsgaard

4 жыл бұрын

Cr3t2u David yes it will! As long it’s fun to build, and you can hit with it, there is no problem

would static non bending limbs tips make the bow faster?

@peterjuulsgaard

2 жыл бұрын

It would probably ad a few fps

It will get the job done, how many pounds on the draw weight....

@peterjuulsgaard

4 жыл бұрын

It’s 65 pounds at my drawlenght of 27” and shoots 148 fps with a 627 grain arrow

Your bow will be slower. But with heavier weight arrows and close in shots you should get good penetration. Trick is you've got to catch the animal in close and off guard. When he is committed to making a step is a good time to loose an arrow. He cant do 2 things at once. There is nothing like taking an animal with tackle you have made yourself. I like that holmegard. No tricks, no fancy recurves. You'll get it done.

@peterjuulsgaard

4 жыл бұрын

Exactly! Reading the deer, is half of it!

@larryreese6146

4 жыл бұрын

@@peterjuulsgaard Right. That's why we pick up a long bow or a recurve instead of a rifle. 30 years ago when I picked up an old howard hill longbow and started watching more than shooting, missing more than hitting, I began to have more of an understanding of the animals and my place in creation. The more we limit ourselves the closer we get to the earth and our place in it. The further we get into our artificial existences the less we understand, appreciate, and know our true place in it. When a person limits himself, he understands that man is not so special after all. Our technology has built arrogance and some day our ignorance and arrogance is going to get us into some trouble that we can't tech or invent ourselves out of. Sorry for the sermon. Good hunting. Stay healthy.

the ass now.love this guy

No se ve cuanto marca la velocidad en ninguno de los tiros de la flecha.

@peterjuulsgaard

3 жыл бұрын

¡No entiendo lo que quieres decir! Las flechas vuelan a 146 - 150 pies por segundo