/sci/ - Science & Math

>>11882709

>>10725649
Thanks! They are badass, and I'm trying to fix their problem of being too slow out of the barrel by redesigning them to burn faster, but the designs I have aren't burning fast enough to even match the GyroJets (GyroJets output about 33 Newtons of thrust, mine are barely reaching 20). I think I've narrowed the issue down to two problems, though.

The first is that I don't have the right propellant. The GyroJets are described to be using a "double-based nitrocellulose propellant", but I can't find any data on it. I'm using an ammonium perchlorate and polydimethylsiloxane propellant, but the data I have is shaky. Which is kinda expected, such data is probably restricted somewhat for national security reasons. But what I need is good data on a very fast-burning high thrust propellant.

The second could be that I have the propellant grain geometry wrong. I'm designing an end-burning solid motor, but most depictions of the GyroJet appear to be a bored grain. Which makes sense as bored grains offer much more thrust compared to end-burning. However, they're abit harder to model, and there's lot's of variations in the bore shape.

I might make the switch to bored grain if I get desperate, but right now I'm focused on finding the right propellant. It HAS to be out there, somewhere.