Primitive Archer
Main Discussion Area => Bows => Topic started by: dragonman on December 25, 2011, 03:55:55 pm
-
Hi everyone....happy christmas....I finnished this bow on the winter solstice, just shot him in with a few hundred arrows to see how stable he was. Of all the bow material combinations I beleive this has to be up there with the best. Very good speed and no hand shock at all...
It is 60lbs @27"and 59" ntn. Came in at 19oz..... for a 60lb bow with a 10" stiff handle, that is pretty light ( I think). I've been tweeking the design of this bow for a few years to see what the materials can take, this time I increased the bamboo thickness to 3/16" ( I usually use 1/8"), to see what difference it would make!!! This bow started with a 5" reflex and ended with 4" and took 1/4 " of set in the straight section of llimb. It seems that with these bows, after about 3 1/2" of reflex there is a slight deforming of the materials, probably the ipe belly. I dont think I'll push the reflex further with future bows of this type, but work on refinning the bending profile..... and maybe using a different core... Was wondering what was the biggest reflex anyone has got out of boo backed ipe to date, does anybody know? Was also wondering if anyone had tried a 50/50 thickness with the boo and belly???
By the way, finnished ths bow for the first time , with 4 or 5 coats of pure tung oil , then made my own wax polish out of beeswax and carnuba wax ( and various other bits)...another experiment
-
I love the profile and you are right, Ipe and Boo is a heck of a combination. Very fast looking bow.
-
Crazy sweet...I love the reflex for performance wise. Now let's see it at full draw ;)....your prob about 7" away from 27".
-
Yeh, you're right Blackhawk, its a bit off full draw....I got the wife to take some pics while shooting and picked the best focused pic, maybe not the best fulldraw pic. I'll have a look for a better one.....
-
Yep! A R/D is pretty when those limbs unfold.
-
No problems ;).......I just wanted to see that baby open up into a V at full draw...I can already tell your tiller is good. 8)
-
Very nice work, sweet lines!
-
Good experiment there. I like the profile of this bow. Nice job.
Cipriano
-
Very nice bow, Dragonman. Ipe/boo is a great combo. My first ipe bow was hickory bacled. I went with a shory wide bow and ended up with less belly than backing. The bow shot well but looked a bit off.
-
Cool curves Dragon. How wide is that bugger?
-
thanks everyone for looking and the kind words, I do appreciate it...I think we all need some encouragement and respect for our efforts!!! and I welcome any criticism and advice too...thats the most helpfull...
Pearldrums its bang on 1 1/4" out of the fades, I tried a bit wider and a bit narrower and I think the r/d bows prefer 1 1/4", straight versions like it a bit narrower.. 1 1/8".
Thats my conclusion anyway
-
Very nice Experiment!!
I love R/D designs for hunting bows, sweet!!!
-
Most of the bamboo/Ipe highly R/D I've made have been quick with 1 1/8", or just a hair less out of the Fades. But, not all Ipe is the same.
-
Really like this bow. You did some fine work.
Lane
-
Mullet, your right, the darker more oily ipe seems to be the strongest, bamboo also varies a.lot in strength and depends how flat the boo backing is,along with so many other things,... its impossible to make enough bows to draw solid conclusions,so its good to hear others experiences too...how much reflex did you use on you're ipe r/d's
-
The last one I did I got the glue up from David Knight. But I had him glue it up with a lot of recurve into it. It was tricky to tiller but kept a lot of the recurve after shooting it. If I remember right it was 64# and did win BOM last year, called Tickled pink.
-
I've been waiting for a rain free day to put some arrows though the chono, so thought I'd post the results for those who may be interested. Was hoping to get over 180fps, but only managed an av. of 170-175fps. I dont have much experience of chrono shooting and i am always scared of shooting the machine ( after I clipped the edge once.....pretty scary ) so I reckon it is possible someone else could have got more,,, but anyway... fast enough for me
-
How heavy of an arrow were you shooting?
-
Blackhawk, my arrows are around 500grains,
Mullet, I tried to find 'tickled pink" to take a look, but couldnt,,,,,,,
-
Very nice bow Dragon, I can guarantee you that your bow will shoot over 180 fps with that arrow. You may not have gotten a good shot off. I have found that at 28" draw about 2 1/2" to 3" reflex seems to be optimimum for a 27" draw like your a little more like 3 1/2 to 4" might be optimimum. Again, beautiful job! Steve
-
thanks Steve for the compliments on the bow and the reflex advice I apreciate it coming from you, I know you have put a lot of work in to refinning bow design, I think I need to practice shooting through the chrono, if I'm going to use fps as a benchmark of efficiency.....
Dave Hook
-
Dragon, when my well experienced bowyer friend shoots same bow/same arrow through the chrono he's always 5, 10 and more fps faster than me; same problem, sort of scared of hitting the thing...
PS: love the side profile of your bow!
-
I agree that your bow should be faster than that too with the mentioned mass,design,and draw weight and length . I mark an arrow at the bows draw so I know im hitting exactly its listed draw,and have someone watch me so that I know I hit it correctly. You could've been doing several things wrong. Like short drawing. It really is hard to wacth the mark on your arrow and make sure at the same time you don't shoot your chrono. Again..your BBI rocks man :D
-
I bought the chrono thinking it would give me an absolute indication of bow efficiency, but I quickly realized it was more down to how you shot through it, so I havent really used it much. Your right Blackhawk I appear to have unconsciously shortened my draw. I used to shoot 60lb, but I have been shooting weaker bows lately and what with getting older, maybe ,....think I've lost some strength as well. Time to pull it all back together......