I hope I'm not venturing too far into research/experimental territory with this question.
The background of the question is that I might someday want to fly a tribrid here in Germany or build something similar or retrofit an existing hybrid, and it would be next to impossible to import anything containing solid rocket fuel from the US.
I understand that the RATTWorks Tribrid https://www.rattworks.net/research_tribrid.html uses two U/C valves, a small one (1/8"?) for the alcohol and a large one (5/16", 3/8"?) for the nitrous. Before filling, the alcohol tank is plugged in the U/C valve using a "fuel plug", which will burn through shortly after the larger fill tube has burned through and the plastic fuel grain has been ignited.
What exactly is this fuel plug? Is it a solid fuel rod, or is it a nylon tube containing solid fuel at one end? What kind of fuel is it? Or is it actually just a plug made from plastic which will simply burn away due to the heat created by the burning nitrous and plastic fuel?
Thanks in advance
Oliver
The background of the question is that I might someday want to fly a tribrid here in Germany or build something similar or retrofit an existing hybrid, and it would be next to impossible to import anything containing solid rocket fuel from the US.
I understand that the RATTWorks Tribrid https://www.rattworks.net/research_tribrid.html uses two U/C valves, a small one (1/8"?) for the alcohol and a large one (5/16", 3/8"?) for the nitrous. Before filling, the alcohol tank is plugged in the U/C valve using a "fuel plug", which will burn through shortly after the larger fill tube has burned through and the plastic fuel grain has been ignited.
What exactly is this fuel plug? Is it a solid fuel rod, or is it a nylon tube containing solid fuel at one end? What kind of fuel is it? Or is it actually just a plug made from plastic which will simply burn away due to the heat created by the burning nitrous and plastic fuel?
Thanks in advance
Oliver