Author Topic: Trashwood/Wingnut sinewfest (Read 10789 times)

'46 · « **Reply #20 on:** November 19, 2003, 09:05:00 AM »

Another question for ya Rusty. A few folks have had problems with sinew coming off at the bottom of the arc of the reflex curve, trys to span the curve as it dries.

Never happened to me but it drove Cooter crazy on a couple of bows he did, and a couple of guys posting on the LW last year had the same thing happen. ...What do you think?

trashwood · « **Reply #21 on:** November 19, 2003, 11:49:00 AM »

Geroge - I have not a general problem in the recurved areas at all. I have had sinew try to lift though. I use a needle and syringe to inject hot hide glue under the area and then whip it down with b50. I let it set for a week and start again. I really haven't had a major problem with sinew tring to lift but then again I don't put real sever reflex in my bows. I read somewhere that a bowyer wrapped the sinew in some areas that he thought might lift due to shrinking of the sinew and thus pulling loose from the back.

What I'm looking for is a bow that will delivery a 10gr per pound of draw area at 160 fps. 160 fps is my natual "groove". I know we talk about 180fps bows. at my 26" natural draw I don't get them at draw wieghts I want to shoot. I'm plumb happy, plumb tickeled pink with a fine shooting sinew bow in the 50 to 55 pound range sending a 600 gr arrow 160fps. A bow that is well shot in, no tricks on the speed trap without too much reflex, good sweet shooter.......nice tidy and short.......that is what i'm about with sinew.

I leave the fire breathing missle lunchers to the better shots in the group

Rusty

trashwood · « **Reply #22 on:** November 19, 2003, 11:55:00 AM »

BTW I have personally shot a sure nuff hyperspace sinew missle luancher that was 65# draw at my draw 52" ntn and sent a arrow thru the speed trap with me shooting it at 183fps. Bow was built by Brad Smith. Started with 8" of prestressed relfex ended up with 4 or 5 inches left as I recall. Brad could shoot up a strom iwth it......i couldn't even get the bow strung

Rusty

Madpigslayer · « **Reply #23 on:** November 19, 2003, 03:14:00 PM »

Quote

Originally posted by trashwood:
deerfly - 'em little coon tials is going on your bow Barfly

more in a bit

Rusty

this might be a small point Mr. Rusty Sir...but barfly is going to Killdeer, not Deerfly...sorry about that deerfly! (I just gotta try and help out when I can....haha)

trashwood · « **Reply #24 on:** November 19, 2003, 10:46:00 PM »

Oh ah ah well thanks Calvin....did i get a little confused???? dang brain cell are going fast at my age

Rusty

trashwood · « **Reply #25 on:** November 20, 2003, 08:37:00 AM »

the sinew is hard and amber colored, I'm gonna move it into the drying room. about 95 degrees and 30% RH.

I'll get ya a pic tomorrow

Rusty

trashwood · « **Reply #26 on:** November 20, 2003, 08:44:00 AM »

I didn't mention it before I see but this is an interesting bow. the belly is of garlite (sp??) and man made baleen/horn like substance. I don't know anything about it. It will be intersting to see how the bow preforms.

If ya look real close ya can see the dark belly lam of garlite in some of the pics.

Stay tuned. gonna be interesting to see how she flings an arrow

Rusty

wingnut · « **Reply #27 on:** November 20, 2003, 03:34:00 PM »

Rusty,

Garolite is a phenolic that Joe Don turned me on too. To tell the truth, I'm trying to get down a design for a hunting bow for myself using baleen on the belly. The stuff is so darn expensive I decided to do my experimenting with the garolite. JD says it works a lot like the baleen and I can make a lam for a bow for about $4.

We'll see when it's dry.

Mike

AZStickman · « **Reply #28 on:** November 21, 2003, 01:35:00 PM »

I thought I might save someone from making a mistake I did on my last sinew bow.....I had a lil 56" osage bow 65#@28" I had tillered and shot in when it developed a crack, she was showing about 1 1/2" of string follow.... I plugged the crack got it on the blocks like Rusty is showing got her all sinewed up and let her set for 3 months it was holding 1 1/2" of reflex..... I took her out and put a snakeskin backing on her..... got to looking at it the next day and I was now showing an even profile I had forgot to put her back on the blocks when I introduced moisture from the hide glue.. Well I took her out and tried to get her back on the blocks and had a small crack split out from my plug.....Fortunately for me Mike ( Wingnut) Just happened to be coming out to AZ for a Sabatical with his better half and we met up in the high country.... I took the bow with me and gave it to him to work some magic on.....He did an awesome patch on it and I retillered it down to 53#@28".....I've got about 1500 arrows through her and she'sholding up nice.... Shows about 1/2" of string follow just after unbracing.....Hope my mistakes help someone down the road.......Terry

Adam Keiper · « **Reply #29 on:** November 22, 2003, 01:08:00 AM »

Man, Hadn't thought of that Terry. I just sinewed a bow tonight (only my 2nd sinew job...hate the mess) that I'll be putting snakeskins on. Thanks for the tip!

Throwing out another tip, I accidentally discovered a handy way to pre-soak my sinew bundles in warm water. I kept my hide glue in a plastic grocery store container that I floated in a pot of hot water. I kept a short (8") 5/16" dowel floating alongside the plastic container to mix the hide glue after running upstairs periodically to nuke it. Anyway, I found I could drape 4 or 5 sinew bundles over the floating dowel to get them pliable while I worked on laying in another bundle. The dowel kept them neat and tidy...alot easier than having to fish discheveled bundles from the bottom of the pot.

BTW, Think 2 weeks in a warm, dry basement is long enough to allow 2 layers of sinew to dry? I'm trying to get this bow done for Christmas.

trashwood · « **Reply #30 on:** November 22, 2003, 01:13:00 AM »

Really good point Terry as I have had exeactly the same thing happen to me when I snake skinnned a sinew bow. From then on I like you put the skin one and put it in the blocks to dry back to the orginal profile

BTW when "I" talk about a sinew bow. I'm not talking about an osage bow with sinew on it. I talking about a sinew bow with sinew on it

for example

http://stavestobows.homestead.com/files/turkeystick.jpg

50" ntn 1&1/2 static lift in the tips, 62#@26" (i draw it 26") est 2000 shots thru the bow, 3 hunting season and one 3D season......1" of set thru mid bow. now that is a sinew bow mate

Rusty

trashwood · « **Reply #31 on:** November 22, 2003, 01:23:00 AM »

LOL George, the reason is ya ain't never built a sinew bow yet. Ya'as think about slefbows with sinew on them....there is a big difference

Rusty

trashwood · « **Reply #32 on:** November 22, 2003, 10:36:00 AM »

Hee is what Wingnut's Faux Baleen looks like now. It's be in the drying room for a couple of days and ready to go in the dring box. The sinew looks dry, feels dry but has not hit the maximum shrink yet. The sinew/hide glue "shrink" is what we'as after. that is the magic in sinew. Ya make sure that both limbs are not glued down to the blocks so the shrink is free to work it's magic.

http://stavestobows.homestead.com/files/sinew11twwn.jpg

Put her in the drying box and let her load put the heat. She storing it up to fling 'em arrows

Rusty

deerfly · « **Reply #33 on:** November 22, 2003, 12:11:00 PM »

duh, the light just went on, "shrinkage"

thanks Rusty, gotta' work one of these into the schedule and feel the "magic" myself.

OK Calvin, I got yer number bucko...

Madpigslayer · « **Reply #34 on:** November 22, 2003, 01:33:00 PM »

Deerfly...I am waving the white flag!!!!

trashwood · « **Reply #35 on:** November 22, 2003, 06:07:00 PM »

yep deerfly the reason ya put pre-stress (reflex) in to the sinew bow is cause when the sinew shirnks it holds that reflex. Sinew shrinkage on dring is the fire in the belly

Rusty

Madpigslayer · « **Reply #36 on:** November 24, 2003, 11:36:00 AM »

How do you guys go over the tied down middle section with the sinew? if it is tied down...I dont get it. I am planning on starting to sinew my first one in a week or two. are 8 elk tendons enough to do a short osage pony bow BTW?

...oh yeah. "makin sinew heap work" think I gave myseld tennis elbow pounding out them things!

Bowjunkie · « **Reply #37 on:** November 24, 2003, 12:24:00 PM »

Ahhh, I sure have missed your pictorials Rusty.

The bow I hunted with this year was a snakey, sinewed, diamondback-backed, Torges-style osage bow. Sinewed it straight, it took about 1" of reflex when it dried, which it's since lost. It's now straight again and holding there.

- love that smell

wingnut · « **Reply #38 on:** November 24, 2003, 12:30:00 PM »

Calvin,

I used artificial sinew to tie it down. Just drill two holes in the board not the bow. One on each side of where the center of the bow rides and thread the art sinew through the holes and around the bow. Tie it down tight and when the sinews dry, just clip it off tight to the sinew on the back. Works good and it will be under the grip.

you could probably do two bows with the sinew you have pounded so I think it's about right.

Are you using hideglue or knox?

Mike

It's at my place in the dry box at 90 degrees and 30% humidity for the next week. We'll take a look then.

Madpigslayer · « **Reply #39 on:** November 24, 2003, 01:38:00 PM »

Mr.Nut. that makes sense! I will stop at 8 tendons then, dont wanna be short. I'm kinda happy about that...I was considering shipping the things to a sweat shop to finish them up LOL.

one more quick question if I might...on these bendy handled sinew bows, is there much more thickness in the handle area? and what are you gentlemen preffering for handle wraps on these type of bows?

...I will be using (store bought) hide glue too BTW.

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Author Topic: Trashwood/Wingnut sinewfest (Read 10789 times)

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