That 38mm 16 inch case is great. Back when I was in college we used one to get started in EX hybrids (and hybrids in general with the G100 reload). Ended up with basically a full H / baby I using CNVAs and 4 inch printed grains.
Don’t have on website but have 20 pound aluminum cylinders as well.
I'll be flying a few G-130 reloads first then setting sights on L2. CNVA with short 3d printed ABS or ASA grains are the eventual plan though, I'm really looking forward to seeing how the grains I've been printing for micro hybrids scale up!
You need a certified motor and certified reload for a cert flight. So don't use all your reloads for testing. Do you have a TAP/Prefect lined up?
I do finally have some communication going with QRS and can certify with them, and a couple of people have reached out to let me know about what I need to do with licences if I need to fly in NSW too.
Be aware that the pyrotechnic license required for HPR in NSW will probably take a few months, along with a security check, too.
That’d be rad if I'm ever down that way, thank you. I’m 99% sure that qld licence to use explosives can be recognised and used in nsw so should be able to just use my qld one, but I do believe there’s still an application form to do, probably takes the same time to process anyway haha.
Pretty sure if you're already legal in Qld, any other launch location will look after you by being the named pyrotechnician.... It's expensive enough to fill in the paperwork the first time.... As long as they know you're coming.
BP is the safest and easiest method of separation/ejection. It would be really useful if the Warning Warning Danger Will Robinson agencies would permit the same amount of BP as is already permitted for a rocket motor OR let's say 5 g instead of the 62.5g already permitted as a solid propellant motor. Failure to permit that leads to an increased potential failure rate from the fact that IT IS NOT PERMITTED. By NOT permitting small amounts of BP rocket safety is reduced.....
What are you using for ejection?
Both NC powder/cotton and BP (I put in the effort to get the permit), but the latter only if I run out of NC. I use BP for the pyrovalve on my hybrid (BP holds back a piston) but i remember Edward posting about using oil instead of BP.
Can you get regular hobby BP motors in Germany, you can use that for a pyrovalve.
The great thing about this, is that in the last few years many new technology changes have happened and things like handheld compressors, oxygen generators, high voltage supplies, 3d printing and all the other great things that that are available, allow us to completely rethink our options for a fully pyroless system.
They're available, even some very nice 18mm motors that use some other (higher Isp) chemistry but look and work like BP ones. But cutting them up would be illegal again, even if you have the certification to use loose BP like me. For the prefilled I'll go with BP to hold the piston back for now. If going pyrofree peaks my interest I'd change my design a little and use some kind of liquid or paste instead of the BP.
I've just received a spare 38mm forward bulkhead/vent and floating injector, same as in your order, in five days!!! Thank you Tom!
Im leaning more to using the Rock hard, maybe cast into a phenolic motor case as a carrier, plus use a nozzle washer to support it.
I assume that would probably work. Hybrids are pretty good at burning most things but I dare say stuff like rock hard or other quick setting concrete would last long enough to be an effective nozzle
The one thing that ceramics buys you is they're generally already oxidized. Of course, that's a moot point if the temperature is enough to melt or decompose the molecules.
Why not lean more to sodium silicate based putties such as some muffler putties? Fill them as highly as possible with FG or CF strands.
Why Durhams?
