#exothermic — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #exothermic, aggregated by home.social.
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The glider now has 12 pounds of lead shot and epoxy added to dead space in the very end of the tail boom.
My initial estimate of volume indicated that I could add 8 - 10 pounds this way. I'm pleasantly surprised, and I didn't make a chocolate covered mess of things as I was pouring this goop into the tail.
I need to add a few more pounds to the tail. Phase two of this project will use lead plate, bolted to the vertical fin spar. (I need to unroll the 1/4-inch plate first, then develop a template to cut the lead.)
I could not add the epoxy/lead shot mix all at once because of the exothermic reaction of epoxy. When mixed epoxy is in a thick blob (instead of a thin layer), it generates enough heat to warm itself...which accelerates the chemical reaction...releasing more heat...further accelerating the reaction.... I have seen epoxy smoking hot because of this, so I added a bit, waited a half hour, checked temperature with an IR non-contact thermometer, added a bit more when it was clear that the exotherm was only very mild, etc. That took a while, but turned out well.
I note that Roto Metals has a discount on some 1-inch lead plate. Get your fork lift ready. No free shipping!
https://www.rotometals.com/lead-sheet-plates/sheet-lead-1-64-lbs-sq-ft/
#AvGeek #Aviation #ElectricAircraft #Homebuilt #Glider #DIY #EAA #Ballast #Math #Density #Exothermic #Chemistry #Thermodynamics #Lead #Epoxy
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Loving long-life heat patches at the moment, in the arsenal of attempts to get my goddamn #cyst to draw out.
These patches are based on iron's exothermic reaction with oxygen; once you deploy them, the air gets to them and heat is produced for hours at a time, while the contents basically turns to rust. Who knew?!
Shame I can't get medical attention to just tackle it surgically... massive gap in #nhs remit/capacity here, if you ask me.
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Loving long-life heat patches at the moment, in the arsenal of attempts to get my goddamn #cyst to draw out.
These patches are based on iron's exothermic reaction with oxygen; once you deploy them, the air gets to them and heat is produced for hours at a time, while the contents basically turns to rust. Who knew?!
Shame I can't get medical attention to just tackle it surgically... massive gap in #nhs remit/capacity here, if you ask me.
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Loving long-life heat patches at the moment, in the arsenal of attempts to get my goddamn #cyst to draw out.
These patches are based on iron's exothermic reaction with oxygen; once you deploy them, the air gets to them and heat is produced for hours at a time, while the contents basically turns to rust. Who knew?!
Shame I can't get medical attention to just tackle it surgically... massive gap in #nhs remit/capacity here, if you ask me.
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The Incredible Tech of the Vacuum-Seal Flask - I recently started using a 50-year-old vacuum-seal flask that belonged to my Grand... - https://hackaday.com/2021/10/21/the-incredible-tech-of-the-vacuum-seal-flask/ #inthishouseweobeythelawsofthermodynamics #heatconduction #thermodynamics #sirjamesdewar #vacuumsealed #endothermic #evaporation #convection #dewarflask #exothermic #radiation #featured #interest #history #science #thermos
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3D-Printed Thermite Brings the Heat, and the Safety - Thermites are a double-edged sword. Packing a tremendous energy density, and eager to produce tremen... - https://hackaday.com/2020/09/10/3d-printed-thermite-brings-the-heat-and-the-safety/ #energeticmaterial #exothermicwelding #aluminiumpowder #thermitewelding #3dprinterhacks #chemistryhacks #weldinginspace #solderjoints #engineering #originalart #exothermic #ironoxide #featured #thermite #rust