3 lam Hill Style stack help?

[canopyboy]

I got to thinking, so I went back and looked at my last several Hill bow specs. Here are a couple that are 66" with 13.5" risers. A bit light, but shows that Ben's numbers are quite reasonable. James, I'm not sure what you're looking at to make sure we're all talking apples and apples here.

Exhibit A: 0.524 total stack at the butt yielded a 44@28 bow with 0.005 taper and 0.043 glass, 1.15" at the fades to 0.47 at nocks.

Exhibit B: 0.536 stack w/ 0.043 glass and 1-1/8 at the fades yielded 50@29.

For reference that we're definitely in the over 1/2" stack ballpark: I also have dimensions on a Big 5 built by HHA. It was a 15" riser and 70" nock to nock, but was 0.0066 taper and 0.603 total stack at the butt, or about .59 at the fades. It was marked at 65#, but measured about 60.5@28 on my scale.

I've got a bunch more, but that's what is in front of me at the moment.

-Dave

[mikkekeswick]

I'm gluing up the form for one of these today.
Just out of interest are you going to be tapering width in straight lines from the fades to the tips?

[JamesV]

Michels/canopyboy

The chart I was using is the Longbow chart posted by Bingham. Their chart says a 68" longbow with a .435 stack will produce a 70# bow. The chart doesn't give taper rate, limb width or riser length. The chart that Michels posted gives all the details of the build and if it is measured from an actual bow then it has to be correct. I recorded your numbers and specs to my personal book.

Thanks Guys for your post and you probably saved some of us from a very disappointing build,

James

[michaelschwister]

4 lams 0900 tapered 001 (3 on back of riser, one on belly), .040 glass may get you close

[bowhntineverythingnh03743]

I'm currently making a hill bow at 66 tip to tip though. I went with bamboo core and my stack I figured would be .475 and I am looking to reach 45# at 28 inch draw. My bow is 1.25 wide right now but at the end I figure I will be around 1 1/8 wide at the end of the riser to .5 tips. I really round the heck out of my edges so I always make my stack a little thicker than what I need. I'd rather take away more than not have enough. I am about to cut the nocks in and I will let you know where I stand now later on maybe tonight.

Good luck!

[bigbob2]

I just finished a longbow [HH style] and with 1 x .o40 black glass, 1 x .043 clear, and 4 lams each .001 taper the total stack was .525. Result was 50# at 28'' and 66 NTN.