It's trilam season again

[Roy from Pa]

Thanks, I noticed that also, Mike. This bow was shorter than I normally make. Thus the increase of reflex did present a challenge. From now on all my bows will be 66 tip to tip. The bow in the latest trilam build is 66, thus the less reflex and it tillered out like a dream.

[monterey]

Just grind that 'boo off and glue some glass on it.  She'll be OK.      

[Roy from Pa]

Ya think ole Kennym might sell me some gwass?

[monterey]

Yup, and he ships fast too!

[Bowjunkie]

Roy, don't resign yourself to a given or minimum bow length. You can alter other design parameters to make shorter bows that you may like just as well, or better. I've made them less than 60" long and over 60#, they held their shape, and I loved them.

You gotta quit trying to tiller all your bows circular too. When it's not in their best interest, it can make the mid and/or outer limb weak on them and cause set there.

[Roy from Pa]

I understand Jeff. All I need to do is on a shorter bow use lower end posts.

[perry f.]

Roy, If you were shooting for 55-60# at 27", what dimensions would to make your stock?

[Roy from Pa]

Belly lam 1/4" parallel.

Core lam 5/32nd at riser, tapered to 1/16th at tips.

Boo 1/8th at riser, tapered to 1/16th at tips.

Flares 1 1/4 wide, hold the 1 1/4 out 6 more inches, then straight taper to 1/2 at tips.

64" tip to tip.

[BMorv]

I'll just add that riser length, power-lams, reflex/deflex amount, and tips wedges all affect your final weight too.  You will have to play around with your setup to get it dialed in.  You may want to go a little thicker on the belly lam on your 1st one.

[perry f.]

Thanks guys. Roy, what size riser do you usually use?

[Roy from Pa]

12 to 13 inches..

[perry f.]

Ok, I've ordered my supplies from Kenny. Roy, could you give a little more specs on your riser? Fade length? Maybe an up close picture? I appreciate all of your help.

[BMorv]

I save most of Roy's builds....
 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=125;t=012149;p=1#000000
 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=125;t=013158;p=1
 http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=125;t=010376;p=2
 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=125;t=013884;p=1

[Roy from Pa]

Benton, LOL yes you do. No wonder you are making good bows..      

Riser block 12 inches long by 1 3/4 wide to start.

Mark the center at 6.5", measure up and down from that center line 2 inches. That will be your 4"grip area. But see below.

I lay out the actual bow shape on my boo and cut that out. I have a pattern already cut to shape and I just use that.

But from the center of the length of the boo, I measure up 2 inches, that is the top of the grip and also is the arrow shelf. From that line I measure up 2 more inches, that is the flare, and measure up 2 more inches and that's the end of the riser.

Then repeat that measuring down from the center. The first 2 inch line is the bottom of the grip area, second 2 inch line is bottom flare and the last 2 inches is the end of the riser.

I use 13 inch risers too, I just add an extra half inch onto the distance between the flare and end of riser on each end.

[Roy from Pa]

This is sorta what you want. I don't have a later picture, but you get the idea..

 

 

[perry f.]

Thanks guys. I really appreciate it.