Another test...

kennym · May 17, 2021, 03:55:07 PM

Doing some tests on hard maple with different grain . Got to do some cipherin and I'll be back...

Longcruise · May 17, 2021, 04:30:45 PM

Now ya got me wondering. 😀

Order finally got here today. USPS been screwing around for a week now!

Bowjunkie · May 17, 2021, 05:08:51 PM

Curly and quilted are my favorite maple grains

kennym · May 17, 2021, 05:33:00 PM

Well this is a core lam test, shoulda specified ...

[attachment=1]

Mad Max · May 17, 2021, 06:15:39 PM

I have always wanted to resaw Hard maple flat grain, glue up a stack and Resaw like Boo flooring into lams (action Maple)

What do you think Kenny?

Buemaker · May 17, 2021, 06:16:02 PM

Mucho interesting.

kennym · May 17, 2021, 07:32:59 PM

Mark, it would be like the original awood. I did some with 3 pcs of maple to keep glue lines down. It didn't show much if any stiffer than just maple...

Now then , for a swap bow a few years back, I made some pretty fast tapers of walnut and some of maple and put them together running opposite and then resawed for core lams. Walnut to tips and maple to center.

The recipient told me it was the fastest bow he owned. Probably just bein nice tho...

kennym · May 17, 2021, 07:34:24 PM

All 3 lam blanks from same board...

Different grain , wondering how much difference grain makes.

[attachment=1,msg2963466]

kennym · May 18, 2021, 07:23:17 AM

I sawed a parallel from each grain type, sanded to .080 "

Then clamped to bench with exactly 18" over the end. Measured to a pc of plywood laid on floor . Using the same 2" spring clamp on the end of each one I compared the first measure of each one to the weighted measure.

The results were about as expected, and not enough to make a lot of difference sandwiched in glass.

kennym · May 18, 2021, 07:43:03 AM

[attachment=1]

kennym · May 18, 2021, 07:46:18 AM

Results (somebody check my math . Shoulda done in thousandths!! )

kennym · May 18, 2021, 07:56:58 AM

Sorry for the plug for your bone doctor , I don't know how to fix that!

Flem · May 18, 2021, 08:42:56 AM

Thanks for sharing, good info for sure

I wonder which sample would return to neutral the fastest and take the least amount of set after prolonged loading.

kennym · May 18, 2021, 08:50:32 AM

Not done yet, as time allows I have another one or two to try.

Have a spine tester I built for wood arrows with a dial indicator to check deflection in thousandths(gasp Roy) that I may try to use to check center deflection...

Roy from Pa · May 18, 2021, 09:06:56 AM

In thousands?

Sure I took night classes 2 months ago to learn the decimal system and now ya change back to thousands?

I'll hafta go back to school and learn thousands again now:)

williwaw · May 18, 2021, 12:38:08 PM

Quote from: kennym on May 18, 2021, 08:50:32 AM
Have a spine tester I built for wood arrows with a dial indicator to check deflection in thousandths(gasp Roy) that I may try to use to check center deflection...

It would be interesting to see how much difference there is between different spots measured on a single sample with the spine tester.

Crooked Stic · May 19, 2021, 09:19:11 PM

EDge is always gonna but the best core material. But the grain can sometimes not be the same all the way thru. Your spine may vary. The actionboo Manufactured gonna be most consistant.
Did ja study decibels to Roy cause I hear Kenny laffin all the way here in Indiana

algstick · July 05, 2021, 01:40:31 PM

Good info Kenny,
I am surprised the flat grain deflected that much over the edge grain.
I just finished 3 hill style bows with 4 laminations of tapered edge grain maple and they honestly shoot very good as compared to a couple of nice custom bows I have had for years. I was surprised, I bought the maple stock because it was cheap and ground my own laminations.