TEST BOWS (pics p5) DATA P6 (NEW TEST P11 )

[kennym]

Jason, trapping may happen after profiling same as other test bows.  Want to go as close as possible to them to see speed and weight diff.

My next test has to do with the thick/width scenario,a narrow bow. Just havent figured out the thickness if I narrow yet. I don't have carbon here,so probably the litest wood I can come up with for tip wedges.

I am planning to test after each mod,no rush this time...

bmgarto- I had already thought of the tonkin,I agree a-boo glue lines may take away from the speed.

I have an osage veneer and amber a-boo bow I'm hunting this year. It was included in the fun fact part of the test..

Swissbow- I will give updates on each modification including weight and speed changes..


MAN, I enjoy this kinda stuff!!

[BenBow]

Actually carbon an glass are heavier than wood. They are lots stiffer than wood so you have to use less.

[Jason Scott]

OK, that helps me understand how carbon lightens the limbs when used compared to a non carbon limb. In that case carbon for a tip wedge is a bad idea. It would make the tip actually heavier than if using a wood wedge. So even on a sleeker single or double carbon bow limb a wood wedge would be the way to go.

[kennym]

Glued up the next test bow today , walnut lams with a natural aboo tip wedge .050 to 0 in 6" in from nock grooves. All else is the same as the other 5 test bows.

Planning on testing speed before gluing on grip cap,then I can add a glass power lam to the belly if it needs it before the grip cap goes on.

Dave Bulla from KC was up and helped me lay it up,real nice guy to drive clear up to help!

[Dmaxshawn]

     Just waiting to see what happens here.  Could be interesting.  

Shawn

[kennym]

OK, had a bit of time(took time off from redoing shop)

Ground out the limbs ,1/16 narrower than other walnut bow,came in 2# heavier with tip wedges(6" below nock)
String angle looks superb at 28",haven't checked at 30 or 31but i will against the bow without wedges.

Will probably allow longer draw before stack?.

Gonna mark the drawn bow on a sheet of plywood,then mark the other 64" test bow I still have to show diff in full draw profile.

The aboo(nat) wedge looks really cool in the walnut core!

Gotta ship an order and go huntin!  

[Russell S.]

kenny, how did you get the tip wedges to stay put. i am thinking about using them on the current twins i am making.  both will be the same as the limb kids bow i just did only 60 or 62" with a goal of 40# and 55#  i think the tip wedges will help increase the draw length.  i thought about CAing a Popsicle stink across the lam just under the tip wedge. to keep it from sliding.  going to pin the lams at the riser this time.  i put some hard thought in to that but i think since i have to use an overlay for this design it should be ok..  finally got brave enough to cut up some of the coco and rose wood i had.

[kennym]

Almost like cheatin,


Laid the lam and wedge like they go in the bow and folded 3/4" masking  tape over the end of them.

Pressed it on firmly,then just hinged it with the tape to glue. They stayed right there!

This part cuts off anyway,you just gotta cut the lams so the t wedge is the right length to come out where you want it.

I started out 11" long wedge and had to cut a couple inches off the thick end of the wedge.

Gino has used CA I think,but said it had some kind of reaction with the smoothon...

[kennym]

Here is the diff in strung profile at first look,it may change after finishing  the new one. Pencil line is bow with tip wedge,I figured it would bend more off the fades?

 

And the slight change in string angle...

 

More to come...  

[oldway]

Can't wait kenny,for us hobby bowyers this kind of info saves a lot of headache on our next project.Thanks for all the work and sharing it,Dell.

[kennym]

Thanks Dell!

Shot thru my chrony with my inconsistent release:

Maple core bow(49#) showed avg of 175.6 and 189.6 with 2 arras(weight unknown ,scale loaned)

Walnut core (48#)with tip wedge showed 179 and 190.8 respectively

The hootershooter will tell the tale,but I hadda run em thru!!    

More later!

[Jason Scott]

At first glance it looks like that walnut with tip wedge is more efficient. And efficiency appears to really shine with a heavier arrow.

[kennym]

You know,I thought the same,but I may have had that "NEW BOW I WANT IT TO BE FAST" thing goin.

You know where you pull it past your ear tryin to get what you want!!

I shot 5 shots on each bow with each arrow,same string. Wrote em down as I went.

 The hootershooter will be more accurate!  :cool:

[Russell S.]

I thought you would get more with the power lam and tip wedge.  i will see what i come up with in a week or two!  what is the total length of your working limb?  (between the power lam tip and the tip wedge)  I am looking at about 16.5" with my new design.  i think i found a chrono at work, so i may be able to do some decent testing.   wasn't the walnut faster w/o power lams and tip wedges already?

[kennym]

I don't have the p-lam on yet,was gonna test before and after installation! Only tip wedges.

The walnut appeared to be a little faster,but you need a bit more lam stack to get weight,kinda like red cedar.

[Bob Barnes]

great stuff here... now I just need to take notes and build a form!  
thanks a bunch.
Bob

[Teagus]

I was lost at the "trapping" talk until I figured out you guys were talking about trapizoid tapering of the limb sides. So I grabbed my Kerner longbow to see how Bill did it.
Starting at the riser, he has the narrow side of the trap on the back of the bow for about two thirds of the limb. Then he transitions to the belly for the last third to the tip. Totally befuddled. Need trap 101 course! I'm heading out to the shop for my Kerner Mountain bow to see how he did the trap on it.

[Swissbow]

Fantastic work Kenny. Can't wait to see the results of the hootershooter. I would love to see a close up picture of the tip wedge.

[kennym]

That I can do, if I can find it in my shop,we are redoing and insulating!

 Think it is helpin,11 outside this AM,38 in the shop with no heat! Shoulda done it years ago!!

[Russell S.]

when it hit 45 in my shop i bought a space heater!!!  working at 38, your more of a man then me!