On Wed, 13 Nov 2013, Alexander Mikhailov wrote: > To summarize what I've got so far: > 1) it is possible, with limited efforts, to obtain reasonable permits to > do some engine testing > 2) for liquid fuel engines and for hybrid engines, it's easier to get permit No, the point that's been made is that you don't *need* any sort of permit to ground-test liquids and hybrids -- rocket engines as such are not regulated, and this is (at present) still a country where you don't have to ask permission to do something unless it falls under some explicit regulation. Certain side effects of testing, like noise and air pollution and hazards to bystanders and property, might be subject to regulation, depending on location. *Flying* rockets anywhere most certainly is. Solids are deemed to be explosives, and those are regulated. Liquid fuels and oxidizers, and devices to use them, generally aren't. Claims that all rocket engines are somehow regulated seem to be vague fears based on rumors, never backed up with citations of real relevant regulations or actual history of regulatory action. (You *can* confidently expect that if you do something really stupid, like completely disregarding safety of innocent bystanders or disruption to your neighbors' activities, then people will look for an excuse to shut you down. That's true anywhere, not just in Canada. The best way to avoid that is, don't be stupid.) Henry Spencer henry@xxxxxxxxxxxxxxx (hspencer@xxxxxxxxxxxxx) (regexpguy@xxxxxxxxx)