Schulz style riser profile

[Scott F]

The bow-making bug bite me again...

I've got some glass and lams coming to make a Schulz-style (ASL) longbow. I am in the process of sifting through all of the threads that I can find looking for tips and tricks as well as profile pictures of the risers on these bows.  I have a total stack thickness from a reliable person to make weight, and I have been able to piece together some rough riser dimensions for this style of bow.

From some of the threads that I've read, I can infer that the cross section of the riser's handle section is sort of teardrop shaped.  Most of the pictures that I see posted on MANY places on the internet include side profile pictures only.

Does anyone have any pictures that are straight on views of their bow's back and belly?

I'm trying to visualize the taper rate of the grip so that my 'knife edge' handle isn't to knife like...

It will be around week before my supplies make it to VA, but for now I (think) that I am going to try to make a 68" ASL that is ~50@28.  I draw close to 30 with my recurves and other longbows that I've made.
I'll be using a straight form so I can expect this bow to follow the string somewhat.
Going with Ash lams and I already have a chunk of purpleheart that I'll use for my riser.  I think my riser will be ~15" long, but I'm still researching this length.

Any back or belly pictures of Schulz bows out there?

Semper Fidelis,
Scott

[Kopper1013]

Ttt

[Mike Mongelli]

PM me a good email address for you and I'll send whatever pics you want.

[monterey]

It is difficult to find the type pics you are looking for.  Hopefully some will be posted.

I notice that you have selected your stack but not for sure on the riser length. Do remember that variations in riser length will effect the outcome of your draw weight as will the frontal limb profile.

[Scott F]

Good point on the riser length and bow profile.
I am going to attempt a 15" riser.  When I make risers I usually cut them a little long so that when I taper the fades on my spindle sander I have some wiggle room.  I'll be happy +/- .5" on my riser length so long as it is paper thin.

For my limb profile, I am shooting for a really narrow limb profile - a la Schulz style. I was intending on a limb that is ~1 1/8" wide at the fades with almost a straight taper to just under 1/2" just below the tips. I'll keep it a little proud at first, but I'd ultimately like it to be really thin when it is finished.  Weight and tiller will decide this for me on this first bow.

[monterey]

I suggest that you build to your design without seeking a specific weight while you tiller.  IOW go with the profile, riser length and stack you have decided on.  You will probably come pretty close to the weight you want and then you will also have a formula for future bows that you can use to predict draw weight.

You did not mention your thickness taper rate?

[Scott F]

Thanks for the advice, I'll do that.  I'm really hoping for a very thin limbed, deep core longbow with skinny tips.

This bow will have a three laminations; two of them with .002 tapers and one lamination that is .001 for a total thickness taper of .005.

I intend to laminate my riser on top of the (3) lam stack and run clear glass on the back and up the belly.

[monterey]

Based on the dimensions you have mentioned so far, you will want to avoid skinny tips.  All of your dimensions are very Hill-like or Schulz-like except for the skinny tips.  With .005 lam taper and 1 1/8" at the fades, skinny tips will result in a very "whip tipped" bow.  A Hill or Schulz bow will have that much taper, but will have tips in the 7/16" to 1/2" range.

You should restart your topic in the bowyer's bench area where there are many builders hanging out.

I see that you are stationed at Quantico.  I lived in Alexandria for several years and spent many happy days bowhunting there.

[Scott F]

Good advice, thanks.  I'll certainly take that into consideration.

I was going to post a new thread in the bowyer's bench after I received my glass and laminations.
I was just hoping for some pictures in this one, and I got a bonus through your replies.


Thanks for your help.

[two4hooking]

Deep cores allow the tips to be very skinny and light, yet still remain stiff in the last few inches of limb.    

 

And you should see how skinny my Nate Steen Sunset Hill tips are.... Nate is a serious student of Schulz's work...


 

[two4hooking]

another side view of the Schulz Redman.

 

[Scott F]

Thanks for the pictures - they are great.
I'm hoping to replicate a deep core limb that is very narrow like the ones that you have in the pictures.

When my lams and glass come in (hopefully soon) I'll probably start a thread in the bowyers bench.

[Scott F]

Those tips are really small.

Those pictures make it appear that there are no tip overlays or tip wedges.

Any issue with low-stretch strings?

[two4hooking]

Correct.  The Schulz Redman (all yew) does not have any tip wedges.  The Bamboo Schulz models do, but they are markedly shorter and thinner that other bowyers.  JS did all he could to lighten the tips for efficiency.  

Nate's bows have a thin layer of internal glass, between the lams, that runs the length of the bow, so he does not use tip wedges either.

I know folks use no/low stretch strings on these bows but I prefer Dacron.