No. This will answer your organization question.Do I need to be part of an organization to fly Class 2 or 3 Rockets? FAA Form 7711-2 requires an organization name.
I think the very last thing you want to mess with is Zinc-Sulfur aka Micrograin propellant. It;s a very sensitive propellant. the Isp is poor too, 35 to 55. I would recommend sugar rockets aka Rocket Candy if you are starting out. Richard Nakka's site is great.How do you design a engine? I can't find what the Isp of zinc and sulfur either...
I have the book and it seems to be quite a good intro into the safe making of solid motors with decent performance. A good starting point . Reading it right now!I don't build my own motors but I have heard good things about this book, written by @prfesser right here on this forum.
Come on JBR. Surely you jest! Pretty stiff investment there in materials and skills I might add. Our now deceased prefect had two lathes, one for casings (with a 16 inch chuck!) and a smaller one for graphite nozzles. He had to get hardware for the big lathe so he could do smaller diameter snap ring motors but it worked. Said the big lathe came off a Navy ship. Had a plate on it that said, "Paint approved by War Department February 1941".
Sorbitol is better than sugar... ZnS is simply dangerous, best left for the amateur guys at Smoke Creek desert if they even do anything there anymore...ZnS has a lower ISP than sugar motors. Also be aware that sucrose can not be used for sugar motors.
As others have suggested you should fine a local club and at least get your L2.
That's materials cost, not the total expense.In a full M 98mm there is 10 pounds of propellant
you do the math based on my costs
AT M1939 is $670
my cost in AP is $30, liner is around that also, $10 orings, extra chems puts my price around $100
current day material costs puts it around $500+ so you save a little
prove me wrong
Yes. Isp of Zn-S is somewhere between 30 and 60 seconds. Blackpowder, about 80 s. Sorbitol "sugar propellant", 130-150 s. Amateur APCP, 160-230.Sorbitol is better than sugar... ZnS is simply dangerous, best left for the amateur guys at Smoke Creek desert if they even do anything there anymore...
you need to look at my previous posts in thisThat's materials cost, not the total expense.
Nozzles and casings can be made...if one buys a large enough lathe. Otherwise one must buy those parts. And there is often a minimum purchase for chemicals, graphite, and aluminum casing stock. Lots of other odds and ends such as a large mixer (if one is making M-class motors), scale(s), personal safety equipment. And a proper place to work (no, the garage won't do, even with the door up; positive ventilation is required, i.e. blower or chemical hood).
How many casings, nozzles, or test stand parts have had a RUD---rapid unscheduled disassembly ---during testing?
Finally, most (all?) of my friends who have gotten into research motors actually spend more on rockets and rocketry than they would have if they had not made motors. One does not save money by spending more of it.
Best -- Terry