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The Basics, Starting Out
Remington glass bed ?
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<blockquote data-quote="Guest" data-source="post: 123064"><p>[ QUOTE ]</p><p><strong> my tests are not scientific </strong></p><p></p><p>[/ QUOTE ]</p><p></p><p>I disagree. Excellent report. You have met the basic requirements for a valid test using the scientific method. You have an experiment design with objective measurements, published your data (which hopefully is repeatable)</p><p></p><p>I also do temperature experiments/measurements. Right now my favorite tool to measure temp is a Fluke FoodPro IR thermo.</p><p></p><p> <img src="http://us.fluke.com/images/products/industrial/thermometers/FoodProGroup.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p>[ QUOTE ]</p><p><strong> dunked the lug in until the water was again at 185. </strong></p><p></p><p>[/ QUOTE ]</p><p>The problem with using water to achieve thermal equilibrium - evaporation has a significant impact on temp (drop). A far better approach is to bake the object in the oven.</p><p></p><p></p><p>[ QUOTE ]</p><p><strong> 180 degrees …. lug grew .0008 … 150 degrees for some comparison and found the lug grew .0003. </strong></p><p><strong> </strong></p><p></p><p>[/ QUOTE ]</p><p>What's missing now is the length of the lug . The coefficient of linear expansion is well know. With the length of the lug we can see how well your measurements fit with established theory.</p><p>[ QUOTE ]</p><p><strong> I took a Remington 30-06 barrel and action out of the stock and measured the lug at 70F. I then heated up the barrel to approximately 180 degrees with a propane torch. I moved the torch around until I got the action about as warm as it is when I am shooting (130-140F) and measured the lug. I was hard pressed to find any measurable growth. </strong></p><p></p><p>[/ QUOTE ]</p><p></p><p>This is the best info and a great test. You (or me or someone else) should now repeat this, but in lieu of a propane torch, torch off a few rounds (you don't even need to be shooting pd's /ubbthreads/images/graemlins/smile.gif ) What's also missing is the temp of the lug after heating the pipe/action - and how you measured temp.</p><p></p><p>I think the best way to measure barrel temp is with <img src="http://www.omega.com/Temperature/images/5TC_m.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p> <a href="http://www.omega.com/ppt/pptsc.asp?ref=5TC" target="_blank"><strong> Thermocouples </strong> and an A/D converter.</a> </p><p>A+ work! Good report.</p></blockquote><p></p>
[QUOTE="Guest, post: 123064"] [ QUOTE ] [b] my tests are not scientific [/b] [/ QUOTE ] I disagree. Excellent report. You have met the basic requirements for a valid test using the scientific method. You have an experiment design with objective measurements, published your data (which hopefully is repeatable) I also do temperature experiments/measurements. Right now my favorite tool to measure temp is a Fluke FoodPro IR thermo. [img]http://us.fluke.com/images/products/industrial/thermometers/FoodProGroup.jpg[/img] [ QUOTE ] [b] dunked the lug in until the water was again at 185. [/b] [/ QUOTE ] The problem with using water to achieve thermal equilibrium - evaporation has a significant impact on temp (drop). A far better approach is to bake the object in the oven. [ QUOTE ] [b] 180 degrees …. lug grew .0008 … 150 degrees for some comparison and found the lug grew .0003. [/b] [/ QUOTE ] What's missing now is the length of the lug . The coefficient of linear expansion is well know. With the length of the lug we can see how well your measurements fit with established theory. [ QUOTE ] [b] I took a Remington 30-06 barrel and action out of the stock and measured the lug at 70F. I then heated up the barrel to approximately 180 degrees with a propane torch. I moved the torch around until I got the action about as warm as it is when I am shooting (130-140F) and measured the lug. I was hard pressed to find any measurable growth. [/b] [/ QUOTE ] This is the best info and a great test. You (or me or someone else) should now repeat this, but in lieu of a propane torch, torch off a few rounds (you don't even need to be shooting pd's [img]/ubbthreads/images/graemlins/smile.gif[/img] ) What's also missing is the temp of the lug after heating the pipe/action - and how you measured temp. I think the best way to measure barrel temp is with [img]http://www.omega.com/Temperature/images/5TC_m.jpg[/img] [url="http://www.omega.com/ppt/pptsc.asp?ref=5TC"][b] Thermocouples [/b] and an A/D converter.[/url] A+ work! Good report. [/QUOTE]
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