noseoil wrote:It's winter & I'm doing a new knife pattern out in the shop. Roughed out a pair of new ones yesterday, which will look like this after the bevels are ground & finishing is done. It's 5160 steel (leaf spring stuff with 0.6% carbon, 0.9% chromium & 0.075% manganese) which will heat treat at about HRC 59. There aren't a lot of carbides when it's quenched, but it's very tough & strong. Holds an edge well enough, but not like other steels with more carbon & chrome, not stainless, but good stuff to work with & makes a good durable knife.
IT ManagerBigDave_185 wrote:What type of work do you do when not being the fire Fighter
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Tom&Shelly wrote:This evening I helped launch my friends' hydrogen balloon from Fiesta Field in Albuquerque.![]()
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We fly hot air balloons for an hour or so at a time (usually right after Sun-up, when the winds are light), but these gas balloons can go for several days. They plan to land tomorrow afternoon somewhere around the Oklahoma pan-handle.
For years, they flew helium balloons for fun, and in competition, and have flown as far as Canada. but helium prices really jumped a few years ago, so they worked with an expert to design a safe hydrogen balloon. (Europeans have been flying them for years.) This has a conductive carbon shell in the envelope, and everything is grounded together to prevent sparks. While being filled, we all have our electronics turned off and wear cotton and wool clothing to mitigate static.
This is (we think) the first manned gas flight with ADS-B, so if you have tracking software, like Flightradar24, you'll be able to see them. The icon looks like a balloon, and they are N505HY.
Tom
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