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About Roger_Mellie

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  1. Well now you know... If you're ever watching a fire and see red smoke: duck. Again as a non expert in explosions (but with a decent background in chemistry) my guess is two explosions, a small one that dispersed the ammonium nitrate and fuel into the atmosphere then a second one that set off the dispersed material.
  2. Exactly. Its what would come out of your car exhaust due to the high temperature reaction between nitrogen and oxygen if someone didn't put a catalyst in the way to reduce it back down to N2O. It needs some additional help in diesel engines, which is what the scandal was all about.
  3. It depends on the conditions, as that determines your decomposition products. Under non-explosive conditions the decomposition products are either N2 or N2O which are both colourless. Following an explosion though you can get NO2 as a product (essentially an over-oxidation product), which has the red colour.
  4. Even worse... Used YouTube to get the procedure for removing the bumper, pausing at appropriate points. For putting it back on he says 'just do this in reverse'. Have you ever tried watching a YouTube video backwards, on your phone and with your hands full of shit? I'm sure I missed a step, which is how I ended up with more bolts than I started with
  5. I track the industry news up-stream of you pretty closely. There was some analysis this week that coatings, adhesives and sealants is doing quite well but being driven by DIY rather than industrial. There might also be some restocking going on if inventories have been run down to preserve cash flow. I've just been having people out to give me an estimate for some garden work doing, they're all having problems sourcing materials.
  6. I had a problem with a speedo that meant I needed to get the instrument cluster out of the dash. According to the official workshop manual (not the Haynes), I should have removed a shitload of interior trim first. Went on Youtube - turns out that there are only 4 bolts to remove and you can just pull the trim surrounding it back to get it out. Similar story with the bumper, according to the workshop manual I should have pretty much dismantled the front of the car. Went on you tube and with a bit of manhandling the whole thing comes off just fine.
  7. Been there. Or the Haynes misses a critical step, just assuming you know what to do. Youtube is pretty good these days. I use it when I want to know how to tinker with something.
  8. Catastrophes like this obviously don't happen very often. You need the right combination of things going wrong, which are themselves low probability events. But if you store enough material, in enough locations for long enough then eventually the 'right' set of circumstances occur. One of the biggest hazards I always had on my risk assessments was risk of secondary explosion due to dust in HVAC ducting being disturbed. Unlikely, bur not unknown and if it goes you're blowing the roof off.
  9. Autistic dogging. That's niche, even for my browsing history.
  10. If it was a bomb it was thermobaric. I think they're banned under the Geneva convention.
  11. Is that right? I'm surprised it doesn't go off if a smaller explosion has dispersed it first.
  12. There's loads, I posted one from Ukraine earlier.
  13. Have a read of this: thermobaric weapon%2C aerosol bomb,by a conventional condensed explosive. Accidental unconfined aerosol explosion. About as bad as it gets.
  14. If it's nox I would guess its monitored by a satellite somewhere. Should stick out like a sore thumb.