Calvin19

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Everything posted by Calvin19

  1. You do not have to be welding to get it. I got it once because the glasses that they gave me in a large steel fab shop did not have side shields; ergo, the flash could get to my eyes from the side. Not fun stuff. During WWII my mother was a welder in the shipyards, she also got it. Jerry Baumchen years ago when I first was learning to weld I did not protect my eyes very well. Woke up at 2 in the morning felling like I had sand in my eyes. No fun I have had photokeratitis 4 times total. twice from winter mountain climbing and twice from accidental expose while working on minerals. Worst one I had to lay in bed for 18hrs with cold packs over my eyes. Even the light leaking under a door in a black room is unbelievably uncomfortable. Feels like sand for sure. And rubbing makes it worse. Only thing that helps is a anti-inflammatory or steroidal eyedropper. I have a running script for Acuveil, an awesome eyedropper/anti-inflamatory. Works wonders for discomfort, and I use it if I even get the hint of a tickle in my vision.
  2. This is why I use 3 separate clear "OP3" acrylic shields as well as a thin black balaclava for my head. The cheap thin working glasses, a full-enclosure lab goggle, and large face shield. A standard gold-coated 'welder' shield does not work because In mineralogy you need to be able to see the entire visible spectrum. (400-800nm), only clear allows this, but most acrylics, plastics, and glass block high energy light (UV
  3. Exactly. Welding is usually from 200-1400nm, giving several unhealthy wavelengths to view with a naked eye. "Snow blindness" being the most common cause, but any high-energy or otherwise 'unfriendly' wavelengths or intensity can cause it.
  4. Nothing brings it on like flying a hand launch and landing 30 pound drone with a $100,000 combination camera/aircraft value on a moving rolling 35' RIB. -SPACE-
  5. This is a great film for anyone who likes the world beneath the waves or wants to see some awesome truly unique cinematography and learn about ocean things should watch this documentary. It just got released on Netflix. Plus, I shot the aerial footage for the film and helped install the underwater time-lapse cameras. https://www.chasingcoral.com [Edit]Independent fact-check review of the science- http://www.bitsofscience.org/climate-change-chasing-coral-movie-watch-7376/
  6. Super nerdy hobby, I know, but it's interesting. I play an amateur mineralogist in radioactive minerals and fluorescent minerals. Here is an Ultraviolet 60w UV-B laboratory transilluminator I modified to 500w UV-A,B and C as a display lamp that I just finished upgrading. I have to wear full skin covering protective clothing including gloves and face mask with three layers of UV protective eye wear. (close fitting clear glasses, laboratory UV goggles with circulation fan and a UV face shield. Any exposed skin is deeply sunburned in about 10min and looking at it with no eye protection causes severe Photokeratitis in about 1 min. It was NOT fun learning that the hard way.
  7. http://southpark.cc.com/clips/154704/quadruple-stuffed-oreos
  8. With the volume off or on? Volume on: favorite- A Real Hero by Electric Youth (Live Session) https://www.youtube.com/watch?v=6cedWvuxwbc Song was written by the drummer Austin Garrick, vocals by the beautiful Bronwyn Griffin. I just love the synth and body language. The song was written about two protagonists, first half is about Mad Max, the second half is obviously about my hero Chesley "Sully" Sullenberger. A -REAL- hero Runners Up- Ways to Go by Grouplove https://www.youtube.com/watch?v=VGvHnDeS12o First by Cold War Kids https://www.youtube.com/watch?v=YfF71PtR7iU Little Talks by Of Monsters and Men https://www.youtube.com/watch?v=ghb6eDopW8I Welcome to the Black Parade by MCR https://www.youtube.com/watch?v=RRKJiM9Njr8 Try by Pink https://www.youtube.com/watch?v=yTCDVfMz15M Never Let Me Go by Florence and the Machine https://www.youtube.com/watch?v=zMBTvuUlm98 Amazing Grace by The Five Strings feat Alex Boyé https://www.youtube.com/watch?v=yenReBNixT4 At the Bottom of Everything by Bright Eyes https://www.youtube.com/watch?v=2GHyLhbdzN0 Volume Off: Anything by Taylor Swift or Avril Lavigne kidding, mostly. I actually liked these two songs and video, but not necessarily for their artistic content: Avril-Hot https://www.youtube.com/watch?v=fzb75m8NuMQ Taylor-Wildest Dreams https://www.youtube.com/watch?v=IdneKLhsWOQ
  9. I stand by my first comment aboveSo you use a milk enema? 2% or whole? I use a suppository oreo only with whole milk. Has the best lubrication characteristics.
  10. I stand by my first comment above
  11. There is no wrong way to eat Oreos. And any imitation Oreo looking cookie is garbage. I'm a soak the whole thing in milk until it almost falls apart and then in one big bite kinda guy.
  12. One of my jobs is test pilot/flight manager for a commercial drone company. I'm currently equipping a 2.2m wingspan long-flight-range fixed wing SAR prototype with standard FPV and FLIR as well as 200w LED down and 200w LED side facing searchlights. During an initial flight test I put up my cheap P3 pro to film the first flight of the new airframe. It's hand-launched and can be hand caught, but with all the mass of flight batts and equipment it comes in HOT. Feels like you're catching a 90mph fast pitch with bare hands almost. I'm filming myself flying a drone with another drone I'm also flying.
  13. Notice the nice arch on that door? I did. I originally thought that the bottom had blown off and the entire upper portion rocketed toward the shooter. But It does look like the door bent to a nice 'arch' and kept excellent trajectory. no spin stabilization needed.
  14. I thought the same thing. But it looks like a manicured lot, I bet they did.
  15. https://www.youtube.com/watch?v=dW4GVUFmPw0 Mod people; if you move this to the soap box side I'll laugh even harder.
  16. With the way you were talking about experience crewing for gas balloons I kinda thought you worked for WorldView. Have you asked them for quotes on envelopes? (Cause I have, six years ago).
  17. Very nicely said. There are a few balloon companies now, launching from quite a few places around the world. Currently working for a stratospheric balloon company under one of the world's top balloon designer, I proposed this question. How would you set up a ballooning operation to lift ~10 jumpers to 50,000-60,000ft and make it equal to the price skydivers are paying for a nice complete rig? He provided his answer and I became curious if there was already talk in the community about doing this. As far as reusable balloons, they are not often used but I have used them. Some painter's plastics are actually thinner than what is used in balloons. For a true space jump (61mi+) a rocket must be used. The ride itself would not be expensive, ~$100,000. There is already a company with the resources. The test jumps, equipment, engineering, training, etc is the real cost. $3,000,000 for a package of equipment, engineering, testing, and a ride is very reasonable. I agree with everything here.^ (quote and response). My main points were the ideas of re-using envelopes, 'hovering' a buoyant unpowered aircraft, and other logistics of using a balloon. An airplane with a large window between mach and stall would be doable at 40000', and far more practical. coffin corner was the reason for the edit in my post a few responses back from 60k to 40-50k. And of course never said impossible, only very expensive and difficult. If you get the company together I would gladly help crew.
  18. I'm curious about that. Cheap is very relative. I looked into building several 130'k, 300kg payload zero pressure envelopes. large hangar/factory/warehouse, materials, parts and custom tools to just get started would be well past five digits. Assuming learning curve, R/D, testing, permits, airspace, certifications, is not included. After quotes we got from manufacturers in 2011, building our own envelopes was more attractive. Moot now of course. space jumping is so 2012. I didn't say not possible, just really expensive. And their initial business plan is WAY more practical than 20kUSD a head for jumping. Seriously, just use a plane. Or even a hot air balloon with fewer jumpers and 40,000'
  19. A gas balloon envelope that can take "~2000lb" (OP's number) to 60k MSL would be really really big. If you find a manufacturer that will make a re-usable gas balloon to those specs I will give them a gold star. A big high five to whoever pays for it. Who I don't want to meet is the poor ground crew gathering up a few million square feet and thousands of pounds of fragile, expensive balloon. Well then I deserve a gold star. It is called a super pressure balloon. If it is to be reused then it is never fully deflated, but brought down and stored in a hanger. The balloon would not be as big as you think, somewhere in the neighborhood of 200,000 cubic feet volume. Weight would be around 100-150lb at the most. Sorry, you have met a poor ground crew member who has cleaned up the plastic. At least we are on the same team as far as GC goes. (12 years GC experience and free PG drops whenever there was room). I also did consulting work for Google's Project Loon (super-pressure helium long duration communication flights) I find it exceptionally hard to believe that a 200,000cf envelope that can do anything but a one time, one-way trip would weigh 150lb. A super pressure balloon is normally not intended for multiple inflations or flights. Re-usable gas balloons, even those that are meant to stay more or less inflated and hangared are at best comparable in mass per envelope area to hot air balloons. It is not easy reusing a balloon but it is possible. I have personal experience unpacking, inflating, and launching a balloon with a 2,200lb payload and designed to float at 110,000ft. the weight of that balloon was only 60lb. granted a reusable super pressure balloon would need more robust film, but it wouldn't add a ton of weight. It could be more feasible to have a one time use balloon that weighs only 30-40lb. Reusing a condom is also doable. But let's not grab the lube just yet. The point of this theoretical venture is to get RAF felix wannabes to 40k or 60k MSL, somewhat reliably. ignoring this would be classified by any insurance company, aviation authority, or investor to be a commercial flight. Ignoring that even hot air balloons are comically un-dependable as reliable aircraft compared to fixed wing. I doubt a 'used' zero-pressure or super-pressure balloon made out of film that makes painter's plastic drop-cloth seem like bullet-proof kevlar would make anyone very confident. IMO you would be better off modifying an existing aircraft already capable of 60kMSL (edit:40-50k, 60k gets a lot more expensive) flight for jumping.
  20. A gas balloon envelope that can take "~2000lb" (OP's number) to 60k MSL would be really really big. If you find a manufacturer that will make a re-usable gas balloon to those specs I will give them a gold star. A big high five to whoever pays for it. Who I don't want to meet is the poor ground crew gathering up a few million square feet and thousands of pounds of fragile, expensive balloon. Well then I deserve a gold star. It is called a super pressure balloon. If it is to be reused then it is never fully deflated, but brought down and stored in a hanger. The balloon would not be as big as you think, somewhere in the neighborhood of 200,000 cubic feet volume. Weight would be around 100-150lb at the most. Sorry, you have met a poor ground crew member who has cleaned up the plastic. At least we are on the same team as far as GC goes. (12 years GC experience and free PG drops whenever there was room). I also did consulting work for Google's Project Loon (super-pressure helium long duration communication flights) I find it exceptionally hard to believe that a 200,000cf envelope that can do anything but a one time, one-way trip would weigh 150lb. A super pressure balloon is normally not intended for multiple inflations or flights. Re-usable gas balloons, even those that are meant to stay more or less inflated and hangared are at best comparable in mass per envelope area to hot air balloons.
  21. Can this be done at the same time as climbing to 40k' in a "reasonable" time? Very few planes can you take to 40,000ft and jump. But the answer to your question is anywhere from 1,000ft/min and up. It really depends on how much helium is wasted in the free lift. If 20,000lb extra were thrown into a balloon lifting only 2,000lb, it would take off like a rocket ship. Not asking how fast a balloon can climb, asking if you can "hover" a balloon over a certain area while at the same time climbing to 40k' in a reasonable amount of time? Longer answer: Assuming perfect conditions in the most ideal area in the world, maybe. If you use a tether. A 60,000' tether for something with ~4000lb inertial mass would weigh (assuming lightest material available) about 4000 pounds.
  22. Can this be done at the same time as climbing to 40k' in a "reasonable" time? Very few planes can you take to 40,000ft and jump. But the answer to your question is anywhere from 1,000ft/min and up. It really depends on how much helium is wasted in the free lift. If 20,000lb extra were thrown into a balloon lifting only 2,000lb, it would take off like a rocket ship. Not asking how fast a balloon can climb, asking if you can "hover" a balloon over a certain area while at the same time climbing to 40k' in a reasonable amount of time? Short answer. No. Long answer. Nooooooooooooooo.
  23. A gas balloon envelope that can take "~2000lb" (OP's number) to 60k MSL would be really really big. If you find a manufacturer that will make a re-usable gas balloon to those specs I will give them a gold star. A big high five to whoever pays for it. Who I don't want to meet is the poor ground crew gathering up a few million square feet and thousands of pounds of fragile, expensive balloon.
  24. This thing is AWESOME http://www.jetpackinternational.com/jet-engine-powered-flying-motorcycle/