Primitive Archer

Main Discussion Area => Horn Bows => Topic started by: simk on September 13, 2020, 01:05:49 pm

Title: My advanced Selfbow 45# @ 28"
Post by: simk on September 13, 2020, 01:05:49 pm
Hi All
I'm happy to post a few pics about my new hornbow. Didn't know weather I should call it primitive Hornbow or advanced Selfbow  ;)
Drawweight is just perfect to me - the originally 52# really felt uncomfortable to handle. It's 61" measured over the back. After resting the bow has a 11" reflex and after shooting around 8" (measured from the nocks). It's shot in well by now. A friend gave me a set of matching arrows too - didn't know how straight arrows can fly; my handicap just improved 50% since  (-S
Specs:
Ash core
Buffalo Horn
Buffalo Nocks
Beef Backstrap
Rawhide
Laburnum arrowpass
620 gramms
8 strands of bcy452x

Cheers 
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 13, 2020, 01:11:11 pm
...
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 13, 2020, 01:13:10 pm
thanks for watching
Title: Re: My advanced Selfbow 45# @ 28"
Post by: sleek on September 13, 2020, 02:25:49 pm
Holy cow! Thats amazing!
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Hawkdancer on September 13, 2020, 10:48:37 pm
That is some bow! :OK :OK!
Hawkdancer
Title: Re: My advanced Selfbow 45# @ 28"
Post by: bownarra on September 13, 2020, 11:16:10 pm
Very nice and i'm glad it worked out well for you.
Love the labernum arrowpass too :)
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Shamusrobert on September 14, 2020, 01:42:54 am
Wow, Thats pretty cool! :)
Title: Re: My advanced Selfbow 45# @ 28"
Post by: AndrewS on September 14, 2020, 03:21:25 am
That's a nice primitive bow (-S
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Pat B on September 14, 2020, 07:49:26 am
Very cool bow and a nice upgrade.   :OK
Title: Re: My advanced Selfbow 45# @ 28"
Post by: AndrewS on September 14, 2020, 08:40:13 am
Which glue did you use for the horn wood gluing?
For the tendons and the rawhide you certainly used hide glue. For the horn plates too?
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 14, 2020, 10:10:01 am
thanx for nice comments dudes. glad you like it.
Andrew: this time I was too lazy to glue the horns with the hide glue stuff and used some of the expensive epoxy instead  (-S
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Del the cat on September 14, 2020, 12:34:12 pm
Very cool bow
Del
Title: Re: My advanced Selfbow 45# @ 28"
Post by: sleek on September 14, 2020, 12:46:50 pm
thanx for nice comments dudes. glad you like it.
Andrew: this time I was too lazy to glue the horns with the hide glue stuff and used some of the expensive epoxy instead  (-S

How did you prepare the surface for epoxy, and what epoxy did you use?
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 14, 2020, 01:03:23 pm
thanx del 🙃

sleek: i do groove both sides well with a metal saw blade, brush them clean and glue with uhu 300 plus. but there sure are equivalent glues on the market i think. this one just has good reputation around here, is easy to work and can deal withe higher temperatures needed for heat corrections, manual says you can temper it @ 180 degree celsius👍
Title: Re: My advanced Selfbow 45# @ 28"
Post by: bownarra on September 14, 2020, 11:57:25 pm
Sleek EA40 works perfectly as well. Mix it 2:1 and you have the required resistance to heat. Flat surfaces are fine, sanded to anywhere between 120 and 60 grit.
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 15, 2020, 01:18:32 am
interesting bownarra, so many people, so many approaches   ;)
Title: Re: My advanced Selfbow 45# @ 28"
Post by: DC on September 15, 2020, 11:06:30 am
That's a beauty. I've still got two pieces of horn.
Title: Re: My advanced Selfbow 45# @ 28"
Post by: willie on September 15, 2020, 04:01:28 pm
 :OK
Title: Re: My advanced Selfbow 45# @ 28"
Post by: bownarra on September 16, 2020, 12:03:41 am
interesting bownarra, so many people, so many approaches   ;)

yes many ways to skin the proverbial....
I've never used it on a full sized bow but this is the way I make the 1/2 size mini hornbows. They are great fun and allow you to try ideas out with bits of waste materials.
Title: Re: My advanced Selfbow 45# @ 28"
Post by: backtowood B2W on September 17, 2020, 05:00:35 am
Great job Simon !!
Love the look, how is this design called? Yrtzi bows or something like that, right?
Greets from pinzgau!
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 19, 2020, 01:04:46 am
Thanx DC! You will do that hornbow after you broke that record  ;D looking forward!

Thanx willie!

Bownarra: I just groove because I think it's a simple and very effective way to strengthen any glueline and in that case because the glueing of the horns to me seems the most critical part of the build. I also groove critical wood laminations, because its so easy and gives a good feeling  ;D Those 1/2 size mini hornbow are fun sure - do you shoot them in the living room?  ;D

Martin: This design just happend to me when I started doing Moellegabets with reflexed levers in the 13/17 ratio in 2018. So I claim this specific design for myself. I did it as selfbows, sinewbacked and then hornbows. The ones I did for you are out of this series too. I later found out, that Yrtzis and Mongolians are similar indeed but I never really examined them and can't say what the differences may are...
Cheers
Title: Re: My advanced Selfbow 45# @ 28"
Post by: tradcraftsman on September 19, 2020, 03:41:34 pm
That's an amazing design, and it looks great to!  It reminds me of the composite longbow mentioned in the chapter Design and Performance Revisited in TTB 4.  Now if only I could get some good horn ...
Title: Re: My advanced Selfbow 45# @ 28"
Post by: sleek on September 19, 2020, 04:28:51 pm
As if I dont have enough to do, you have given me another project....
Title: Re: My advanced Selfbow 45# @ 28"
Post by: tradcraftsman on September 20, 2020, 08:31:16 am
By the way, is that American Bison or Water Buffalo Horn? Did you cut the strip out in a spiral or straight off the outside of the curve?
Thanks,
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 20, 2020, 01:23:21 pm
thanks tradcraftsman, i will check that out in tbb4 ;D its the outsides of water buffalo horns.

sorry sleek, I do apoligize 😁
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Rākau on September 21, 2020, 05:34:35 pm
woweee, that is amazing, how does it shoot compared to your self and sinew backed models?
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 22, 2020, 09:20:55 am
Rakau: 1.2.3. Hornbow 4. Selfbow 5. Sinew Backed
If I had heated reflex in before sinewing this one probably ended 4th place...it's a learning process...reflex and string tension seems to be the key. cheers
i will do more of them. it's intetesting to stay at the same design for a while. will do another elm (,it sadly broke when overdrawing) and would like to check out black locust  and ash also 😁 always busy with projects 🤪
Title: Re: My advanced Selfbow 45# @ 28"
Post by: BoltBows on September 24, 2020, 04:48:09 am
Very cool bow! Great work!
Title: Re: My advanced Selfbow 45# @ 28"
Post by: bownarra on September 25, 2020, 12:15:01 am
If you want to get more performance tiller the horn version to have a more abrupt bend right out of the fades. This will give a longer return path and store more energy. :)
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on September 30, 2020, 02:29:55 pm
that's a good point bownarra  :OK that was the plan - already with this one - but it's not so easy to properly hinge a bow - still learning  ;D
the hinge will also help for good string tension, wouldn't't it?
Title: Re: My advanced Selfbow 45# @ 28"
Post by: bownarra on October 01, 2020, 01:34:00 am
The amount of string tension is more related to the amount of just un-braced reflex you hold.
Title: Re: My advanced Selfbow 45# @ 28"
Post by: simk on October 01, 2020, 02:46:21 am
thanx for enlightment bownarra  (-S
Title: Re: My advanced Selfbow 45# @ 28"
Post by: Aaron H on October 01, 2020, 11:37:01 am
Hey, sweet bow sink!