Ever See This Bow Design?

[tradtusker]

ya Don i really like the idea of the 2 string grooves you can have 2 different Draw weights in the same bow.

the second bow is not strung so its difficult to tell from the pic
basically the first set of limbs are fixed they do not bend, all they do is provide a solid object for the rubber bands to pull against. The other shorter limbs are pivoted, the string is attached to these in one string grove and the rubber band in another (look closely at the bottom limbs to see)

 

so there is no working part of the limbs as far as wood bending. Just the energy coming from the rubber bands as you draw the string they start to stretch against front set of limbs. Confused yet?       im not very good at explaining it sorry.

Also if you look close the position of the rubber band can be changed where the rubber band meets the solid front set of limbs. i guess to change the weight.

[2fletch]

Now it's clear Andy. In the original photo I didn't see the hinge. The advantage to this system over that of using a bent rigid bow with elastic at each tip and a foot or so of sting in the middle is that this one shouldn't slap your hand. Can you see where this is leading?  

Rob, I had no idea that a respected bowyer had made the "two nocked" bow. The natural progession, I suppose, would be a three nocked bow?

[DannyBows]

TradTusker, that Double-Nock bow is what Keith Chastain described when we discussed his Dual-Draw option. He said it's an old technique and his method was just another way to do the same thing. I like it, and having two draw weights in a one or two piece bow is nice. You'd have a 3d and hunting weight bow in one rig without extra limbs. I wonder why it's not a common practice with todays bowyers. I'd be curious to know if it's just not common knowledge, or if there is some technical reason.
That rubber-band bow is really something. I'd like to shoot that to see what it feels like.

[newtradgreenwood]

It also had nothing to do with intimidation. I made no threats or demands only a suggestion and closed Take care and happy hunting.

[Rick P]

Dave no rest to stabilize the arrow, your more likely to drive it through your wrist than actually hit a target if nocked.

Fatboy
There most definitely is racism in words! Go to the blue note on Michigan ave in Chicago and yell the N word sometime! Human expression is 90% verbal and here it is 100% typed, there fore the only way to express racist sentiment is to Type it out using words. Your post is the most bass backwards I've read here in a looooong time.

2fletch
I don't think you meant the phrase as a slur, but it is time to drop sayings like that. I really like your overstrung bow! Neat idea that should have produced better speeds. I've killed about a thousand rabbits using the arrow shot from a wrist rocket idea, deadly at short ranges. Pat B is correct on the African bow, however it's design was intended as a aid in stringing the bow not performance enhancement.

[Rick P]

Sorry I didn't realise there was two pages of posts. I'm way out of context.

[2fletch]

Rick, thanks for sharing your slingshot experience. I grew up with a slingshot and bow, and was looking for novel ways to launch an arrow. My interest is to find and evaluate any alternate way to launch an arrow whether it be by limb recovery, elastic tubing, or something similar to an atlatl.

I hope that we can avoid the deversion and continue to discuss this topic. I really believe that there are some "primitive" methods of launching an arrow that haven't been fully developed. I've been impressed with some of the information that has been shared so far. I did not know that some of this had been done.

[huntindad]

2-Fletch my dads bow was before my time all I know was it was similar to my crossbow we made when I was a kid.I don't remember him talking about slap but I would think that the spring in the tubing would allow it to travel further forward than a regular bow but his bow was short and had a pretty high brace height and had alot of preload in the tubing.The crossbow we made had the string running down the rail just like any, and the ends were lower than the rail and the string could have went over and caught on the end of the stock if it went far enough forward and it never did.Hope that makes sense I will ask my dad about the bow later today and maybe get some answers for you and I am sure the conversation will move into the crossbow he made as a young man using a car spring.    Bill

[2fletch]

Bill, did you learn anything else from your dad?

What you said makes good sense. "But his bow was short and had a pretty high brace height and had alot of preload in the tubing." That would help to prevent the string from slapping the wrist or hand.

[huntindad]

I talked to dad and he said there was no more string slap then with any bow.I think probably because there was alot of preload in the bands of tubing and the short length of the bow (30 inches or so by his memory) and its D shape.He used double lengths of heavy tubing and said it pulled in the high 80's at 30". He said it seemed that at lower weights he experimented with (less bands and less preload) he experienced problems such as low velocity and he thought the string may have traveled forward too far on those models    :D    He said once he ended with this one it was noticeably faster then the bows his dad had which were 40 to 50 pound longbows and recurves. Hope this helps! He also talked about the crossbows made from car and truck leaf springs, one was ground mounted because it was too heavy and he said that thing shot bolts out of sight and I think the bolts were made from heavy dowels 1/2" or bigger. Bill