The best answer will receive a Two Year Subscription to a great magazine, Woodcraft Magazine. Woodcraft is a great supporter of ours, and they support our active duty and veterans around our nation. Have fun!!!

Ok folks, it's been awhile since we have done something fun like this! But here we go!

 

Rules of the Quiz

 

1. No Googling for the answer, (we trust you all!)

 

2. Some answers may appear to be the same, we will choose the best answer for the winner

 

3. Only one answer per member.

 

4. Your answer must be in the following format, A is or indicates, B is or indicates, C is or indicates, D is or indicates.

 

5. All are welcome to play including our Forum Hosts, our Site Administrators and Myself are exempt.

 

6. Questions are welcome, but, we may refuse to answer if the answer is in the answer to your question.

 

7. Only Patriot Woodworker Members may participate.

 

8. Answers will be accepted up until 9 pm pacific time April 27th, the winner will be announced within 48 hours of the closing of the quiz.

 

Those are the Rules!!!

 

QUIZ QUESTION BELOW for Movement of Resawn Wood

 

Now, in the image below what you see, is 4 different pieces of wood looking at them from one end after you have run them through the table saw. You are re-sawing this lumber on your table saw, and after you make your first cut, you immediately see your wood bends one way or the other, or it does not bend at all. In examples A,B,C,D, name the reason why the lumber warped or bent the way it did for each scenario.

 

 

The Winner is Announced! 4-29-2014

 

Congratulations Spence Bloom! You are the winner of our Woodcraft Magazine 2 yr Subscription!!!!!

 

My o my, how close this was guys, you all were so tight and it all came down to wording, in the last case "D".

 

The only Patriot Woodworker who answered on the premise that the wood had just been cut or processed was Spence Bloom.

 

Spence stated "D indicates the board was wetter on the left side, as if the left side sat on a damp surface. Again, the damper side swells and becomes convex. It looks like the slice taken from the right might have been as damp and kept it in balance until it was sliced off, making the current right side relatively dry compared to the left."

 

"D" is the only answer that separated our contestants!!!! How close is that!!!! All the answers were so good, that I wish we could spring for a 2 Yr Subscription for all of you, but we cannot and I am sorry folks. So the prize goes to Spence! Way to go Spence!!!!

 

Spense, please PM me your address so we can get this subscription started!

 

And thank you all for participating, and stand by for more fun in the near future!

 

This quiz was gleaned from Tage Frid's book, "Tage Frid Teaches Woodworking"

 

The full excerpt is shown below.

 

I'm not really understanding the first 3 examples especially if the lines indicate the grain is the same in each but the 4th example makes sense.
Anyway..Grain direction, particularly quarter sawn wood is something not everyone pays attention to but when you re-saw boards that still have moisture content the grain direction can play havoc on the way your board will dry, and after coming out of a table-saw it is common for the edge grains to dry more quickly, and in a board where the grain is not lengthwise to the board, that being where the edge grain is minimal, the moisture evaporation is sever, often more than woodworkers realize.
 

Mark, and all, grain direction has little to do with the correct answers, do not read into the lines, they are there only for illustration purposes.

 

Also Mark, your first response was more of a query then an answer, so we'll not count it as your one shot!

 

 

Remember folks, we are looking for something like this for your final answer

 

 

A is or indicates

 

 

B is or indicates

 

 

C is or indicates

 

 

D is or indicates

 

I am reading the grain to be the same in all examples. Bottom line is moisture. A: appears to be Ideal, cured, dry, seasoned lumber. As to the others B would be moisture in its interior, C would be moisture on the outside side surface, D would be crowning on its left side, or cupping on the right depending on how you are looking at it. But still the wood will swell on the moist side expanding on that side causing the wood to form into this arch because the dry side is not expanding at the same rate.

Brad helped me to understand those drawings, I wasn't looking at it that way, was trying to read grain direction.
I've been working with our saw mills since the 70's and am probably too think headed for the drawings. ;-)

I can go on about this because the effect of environment and H2o is a elaborate and complex subject concerning media, and particularly wood. Also what is interesting and a must know is how do we deal with it in our profession or hobby. That refers to stability. Also there is an interesting width to thickness ratio. You must know how the material is made up naturally or engineered by man, down to the cellular structure. In this consideration it would be prudent to guess ahead as to how water may be introduced from what direction of contact, or was the water there from the mill. Moisture meters are important. Wood doesn't expand in some directions practically & differently in others.

My Grandfather had a lot to say on the subject & from my years of consulting I have lots of stories but the one that sticks is a General Contractor built a number of racquetball courts in tilt up construction (Concrete walls formed on ground and tilted up into a key way laced with rebar and concrete poured into that key way, to secure it.). The General contractor installed the floor as specified nailing the maple strip to runners or sleepers on top of concrete with a membrane. He came up with the bright idea to put sand in between the sleepers to dampen the noise prior to nailing the maple floor into the sleepers. That sand idea is not any way spec! Do ya see where this ids going? Basically the sand wicked water into the maple flooring and because if its width to thickness ratio and number in width (6-8 courts in a row, exterior wall to wall) the walls broke out of the key way, by hydrological pressure. The project was a total loss. Can you believe the power of water in this example? Mind boggling.

What caught my eye was the wood drawing & didn't realize it was a contest at first. Probably wasn't fair I gave my answer and would withdraw it. But I can't finger out how to do that? But Grandpa use to say The fair is a place in Pomona and is only open three weeks of the year....Jus sayin, not showin off, please....

Well said bro. There is an old trick used in saw mills not many woodworkers know about but it can be used in small shops just as well, all you do is cut a piece of end grain then carve a quick wishbone shape out of it, put that in the shade for about 15 minutes, you will see how much shrinkage from moisture there will be in that lumber. Good stuff, really enjoying this site.

A is the way you hope it turns out, no apparent stress in the wood. Core is at same moisture content as surface

B is Reverse Case Hardened, the Kiln operator has overcompensated for normal case hardening at the end of the drying cycle.

C is a Case Hardened board, the outer layers dry first, then the larger core drys and tries to shrink, putting the outer layers in tension. Is normal in a Kiln that dries wood quickly. Normally removed at the end of the dry cycle by admitting some steam into the Kiln.

D Is normal shrinking of flat sawn wood when it is dried. Outer layers shrink more than inner layers causing the board to cup.

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I just looked at it long enough to see the elephant in the tall grass.

If the drawing was in color would it be a pink pachyderm? Can I come over and have what your drinking?

Rob Gordon said:

I just looked at it long enough to see the elephant in the tall grass.

Your too kool Brad. You know what kicked me in the head? I've been using that sawmill trick for a long time and those first three images above that through me off are almost exactly like it. Gosh I can be dense at times.

Just a heads up guys, this quiz is far from over! We are still looking for the most accurate answer! Only one answer per member!

 

Must have been some sawdust in my eye.

A indicates the wood has consistent moisture content throughout

B indicates the wood was wetter on the inside, as if 'green'...the wetter part swells relative to the drier part and becomes convex. It was in relative balance before cutting.

C indicates the board was wetter on the outsides, as if a dried board were stored in a humid room. It was in relative balance before cutting,

D indicates the board was wetter on the left side, as if the left side sat on a damp surface. Again, the damper side swells and becomes convex. It looks like the slice taken from the right might have been as damp and kept it in balance until it was sliced off, making the current right side relatively dry compared to the left.

Keep em coming folks! Looks like this could have been a stumper for many!

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John Morris
The Patriot Woodworker

Greetings All

I have no idea what the answer is as I can just put lump of wood to my lathe, turn the speed up and start turning.

I can't cut furniture pieces to save my life. I'm out.  :-)  

I just enjoy watching master furniture makers how they do it, like John with his rocking chairs, Lew with his bunk beds, other John with his tables. 

Everyone else, good luck..

Have nice day.

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Keep on turning, if not today, do it tomorrow.

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Jari Kilpi said:

Greetings All

I have no idea what the answer is as I can just put lump of wood to my lathe, turn the speed up and start turning.

I can't cut furniture pieces to save my life. I'm out.  :-)  

I just enjoy watching master furniture makers how they do it, like John with his rocking chairs, Lew with his bunk beds, other John with his tables. 

Everyone else, good luck..

Have nice day.

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Keep on turning, if not today, do it tomorrow.

Thanks for coming aboard to say howdy Jari! I always enjoy you here!