That is almost correct. You have to be Tripoli L2 to fly at a Tripoli sanctioned research launch. There are no restrictions or level requirement to make or fly your own motors. NRA and Tripoli has nothing to do with making your own motors. Tripoli's only requirements come into play when you want to fly at one of their sanctioned launches. If you want to make your own motors and fly them in Class 1 rockets (less then 3.3 lbs and less then 4 oz of propellant) you can fly them anywhere without FAA waivers or any other requirement, as long as it isn't a sanctioned launch. If you get your own waiver, you can fly anything that fits the waiver and technically, you don't even need a certification. Of course you will be insured only to the level your personnel insurance cover you.Most people don't make their own motors. If you want to fly research motors, you will have to be at least a Tripoli L2, and fly at a Tripoli sanctioned research launch.
Kurt,Ummmmmmm, compared to making fireworks, APCP is significantly safer because you add powders to liquids and wet them out. The major cause for concern is the bits and pieces left over from drilling 38mm grains and such. In the shop I've been in the
bits are collected after every grain drilled and burned off safely at the end of the session. Don't allow the powder and shavings to accumulate in the work area. When we've burned off a few pounds, we can feel the heat from the flash from
100 feet away. Making motors lends itself to a group social setup. Each individual can do tasks along with rocketry BS and banter. This is a great way for new persons to learn the techniques.
Here's the link to that book.That's a great start! The Canepa book MHPR2 is handy for moving up to HPR, except the electronics section is a bit dated.
Right, No, no, no, mixing oxidizers and fuel dry. Fireworks people do that but they have to be extremely careful. That is poor technique for APCP as you mentioned. This is where mentoring comes in. Yes one isn't going to save anything making theirKurt,
I agree with your qualified first statement. Always starting with liquids and properly wetting out powders are best practice and good procedure. When you follow that protocol the risk is reduced significantly. Safely handling your leftover powder and shavings is another procedure that when implemented reduces the risk.
However, I have seen people mix oxidizer and metals dry before and spew clouds of atomized particles into the air. I have seen piles of shavings not properly handled that have posed fire risk. I've seen people drilling and using a chop saw when cutting sparky motors. Either people don't know about the risks or don't care.
I am not saying don't do it. I encourage the OP to experiment with motor making if that is a goal of theirs. My Main Point for writing that post was and still is before you get started, get some help/guidance to ensure that you have the proper procedures in place to reduce the main risks involved to those around you.
Well he's dead now, BP was king then and actually is more dicey to deal with. I shiver when I see some of the "rocket motor making kits" that have one hit a piston with a hammer to compress the BP mixture.I have zero interest in making my own motors. I was just surprised to see others doing it. I remember Stine was very ​opposed to making your own.