Monday, February 7, 2011
Happy Belated Birthday to Frank Buckles
Sondrak posted last week that Frank Buckles, the last surviving Doughboy of The Great War celebrated his 110th birthday. Click here to read about Mr. Buckles. World War I doesn't get much respect from the history teachers nowadays, but it was big, and it was bad. I see in Sondrak's post that Mr. Buckles drove an ambulance while he was on the Western Front. Robert Service wrote a little about that; go here for a small sample of a day in the life of an ambulance driver during WWI.
Tactical Carbine Tips, Part 6; Courtesy of Ruger Firearms
Dave Spaulding is back with another episode in his series of instructional videos. Ruger is doing a great service to all shooters with their videos on YouTube, and I encourage you to go to the RugerFirearms channel to leave a positive comment. Positive feedback will keep these great videos coming, so make yourself heard!
Sunday, February 6, 2011
Saturday, February 5, 2011
Friday, February 4, 2011
Crankin' It Up
This record is actually a little before its time. The Revelers recorded Collegiate for Victor on September 15, 1925, before the switch was made from acoustic to electrical recording. The style of singing The Revelers use would have come through much better with microphones instead of megaphones, but it is charming, nonetheless. A CD of recordings by The Revelers is available online here. If you have ever heard the Comedian Harmonists, you now know where their inspiration came from.
Thursday, February 3, 2011
Lots of McCormicks
Nice bunch of McCormick engines that we saw at the Evansville show in June, 2010.
Wednesday, February 2, 2011
Throwing Your 800 Pound Gorilla
We looked at height measurement and evaluating lean of trees you plan to fall in previous posts; this time we will be figuring whether or not we can push a tree where we want it with wedges, and giving you some useful numbers that are easy to remember, and to use in the woods. I like to measure the diameter early in the process of sizing up a tree, because the diameter guides your design of the hinge. This tree measures 38" diameter at breast height (4' 6" above the ground), and the hinge should be 80% of that in length, or 30". The thickness of the hinge can be up to 10% of the diameter, but 4" of wood is a lot to bend, so let's figure on a hinge no more than three inches thick.
We are checking the height of the tree here. Charlie is standing at one chain (66'), where you would use the Biltmore stick to measure merchantable height. I found the spot where my stick showed that I was away from the tree the same distance as the height, and paced in 125'. That's a tall pin oak!
We decided where we want the hinge, and measured across that spot to see how a 30" long hinge would fit, measured back 3" for the thickness, and then measured to the back of the tree, where we would pound in the wedges. We had 30" between the back of the hinge and the wedging point, so we break the tree down into 30" segments. If we raise the back of a 30" segment 1", the opposite corner will move forward one inch. The far corner of the next 30" segment will move forward 2"; and so on. This tree is 125' tall, or 1500". Divide 1500" by 30", and you have a 50 segment tree. This means that each inch you raise the back of the bottom segment will move the top of the tree 50", or just over 4'. The crown and weight of this tree appears to be no more than 1 foot behind the stem, so this tree can easily be wedged over against its lean by driving in a set of parallel wedges that are 1" thick. This one was just for practice; now we will drop one.
We are standing at the aiming spot for a black oak snag, and this spot was chosen because there is no side lean from this vantage point, and there is a relatively clear spot for this tree to fall into. A quick measurement and pacing in showed this tree to be 50' tall.
Viewing the snag from 90 degrees around, we see that this tree has quite a bit of back lean. Check the lines added to show where the top is, and you can see that we had about 5' of back lean to overcome. We checked our segment size next.
From the back of the hinge to the wedging point we had 9". Nine goes into 600" 67 times, so we have a tree that is close to 70 segments. Raising the bottom segment 1" will move the top of the tree between 5 and 6 feet, so this looks do-able, but you also need to know some practical limits to guide you before you start cutting. The numbers you should remember are these: For a 50 segment tree, you may be able to handle up to 10' of back lean, if the wood is strong, you have built the hinge right, and you feel like pounding parallel wedges until you are blue in the face. 60 segments, 8'; seventy segments, 6'; 80 segments, 4'. As trees are taller and thinner, you can handle less back lean; as they are shorter and stouter, you can handle more back lean. These numbers are not absolutes, and it is not much fun pounding wedges on trees that are at the limit, so don't push your luck. The larger value that you will gain from these numbers is in evaluating side lean. The hinge you build into a tree with back lean is holding all the way across, and has plenty of strength if you make it right. Side lean, however is pulling on only one half of the hinge, and compressing the other side; plus, the tension is not evenly distributed, being much stronger on the outside of the hinge. This means that the limits on side lean are somewhat less than 1/2 of the limits for back lean. Practice the evaluation process several times before you put it into use, until it becomes second nature to you, and never push your luck around high value targets.
We have raised the back of the tree not quite an inch, and the hinge is handling the stress just fine.
The stem is nearly vertical at this point in the process. The problem you will find frequently with small trees is the lack of space in the stump to work. The wedges have run into the back of the hinge, so we had to stack two wedges to bring the tree over.
We are checking the height of the tree here. Charlie is standing at one chain (66'), where you would use the Biltmore stick to measure merchantable height. I found the spot where my stick showed that I was away from the tree the same distance as the height, and paced in 125'. That's a tall pin oak!
We decided where we want the hinge, and measured across that spot to see how a 30" long hinge would fit, measured back 3" for the thickness, and then measured to the back of the tree, where we would pound in the wedges. We had 30" between the back of the hinge and the wedging point, so we break the tree down into 30" segments. If we raise the back of a 30" segment 1", the opposite corner will move forward one inch. The far corner of the next 30" segment will move forward 2"; and so on. This tree is 125' tall, or 1500". Divide 1500" by 30", and you have a 50 segment tree. This means that each inch you raise the back of the bottom segment will move the top of the tree 50", or just over 4'. The crown and weight of this tree appears to be no more than 1 foot behind the stem, so this tree can easily be wedged over against its lean by driving in a set of parallel wedges that are 1" thick. This one was just for practice; now we will drop one.
We are standing at the aiming spot for a black oak snag, and this spot was chosen because there is no side lean from this vantage point, and there is a relatively clear spot for this tree to fall into. A quick measurement and pacing in showed this tree to be 50' tall.
Viewing the snag from 90 degrees around, we see that this tree has quite a bit of back lean. Check the lines added to show where the top is, and you can see that we had about 5' of back lean to overcome. We checked our segment size next.
From the back of the hinge to the wedging point we had 9". Nine goes into 600" 67 times, so we have a tree that is close to 70 segments. Raising the bottom segment 1" will move the top of the tree between 5 and 6 feet, so this looks do-able, but you also need to know some practical limits to guide you before you start cutting. The numbers you should remember are these: For a 50 segment tree, you may be able to handle up to 10' of back lean, if the wood is strong, you have built the hinge right, and you feel like pounding parallel wedges until you are blue in the face. 60 segments, 8'; seventy segments, 6'; 80 segments, 4'. As trees are taller and thinner, you can handle less back lean; as they are shorter and stouter, you can handle more back lean. These numbers are not absolutes, and it is not much fun pounding wedges on trees that are at the limit, so don't push your luck. The larger value that you will gain from these numbers is in evaluating side lean. The hinge you build into a tree with back lean is holding all the way across, and has plenty of strength if you make it right. Side lean, however is pulling on only one half of the hinge, and compressing the other side; plus, the tension is not evenly distributed, being much stronger on the outside of the hinge. This means that the limits on side lean are somewhat less than 1/2 of the limits for back lean. Practice the evaluation process several times before you put it into use, until it becomes second nature to you, and never push your luck around high value targets.
We have raised the back of the tree not quite an inch, and the hinge is handling the stress just fine.
The stem is nearly vertical at this point in the process. The problem you will find frequently with small trees is the lack of space in the stump to work. The wedges have run into the back of the hinge, so we had to stack two wedges to bring the tree over.
Cross your wedges when you stack them and they will not jump out when you pound on them.
All done.
Practice your measurements, and practice your cuts on trees that don't have any big problems or risks. If you want to test your limits on trees, do it on ones that can't fall on anything of value; and that includes you!
Labels:
Chainsaws,
Forest Products Utilization
February 2, And You Know What That Means!
You should have your groundhog thawed out, and you need to be up bright and early to parboil that critter, and put him in a roaster to cook slowly all day with 'taters, carrots, and onions. Don't forget to plug plenty of spicebush twigs in him to flavor up the meat right! You did remember to gather spicebush twigs, didn't you? No? Oh Well, I'll pick up a bucket of chicken on the way home.
Tuesday, February 1, 2011
Don't Let Winter Get You Down
Iowa winters can keep you from going to the range, but practice is important, and shooting always makes you feel better, and beats back the winter blahs. Crosman pellet pistols sell for around $55 dollars online, plus shipping, and a homemade pellet trap can easily be built out of cardboard boxes for free. You only need 15 feet or so in your basement to have a good indoor wintertime shooting range. The instructions for this pistol recommend a minimum of three pumps, but Bea has found that her pistol shoots just fine with only one pump. Remember to wear your eye protection! You don't have to put on your ears to shoot one of these, and you will still have your trigger finger/eye coordination come springtime.
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