Open source confessions of an "Old Space" engineer.
Tuesday, February 12, 2008
Restartable Hybrid Movie
Here is a movie of the motor that I have been working on recently. It is a restartable, long burn N2O/HTPB hybrid. I've included some thrust and chamber pressure data as well - to me the data is more interesting than the movies sometimes.
I did discover in an earlier test that you can use the hot fuel grain to re-light if you don't wait too long. It seems that it doesn't work after just a few seconds. I'm using a separate spark-based igniter setup. I'll do a post about it soon.
So by "Spark-based" igniter setup you mean you are using an automotive spark plug to first decompose the N2O, and then ignite the fuel grain? Apologies if you consider this a too specific question to your design; but I'm also in the process of designing a restartable hybrid at my University and would love to know any lessons learned you've come across.
4 comments:
Very Cool! Not many have done that before.
How did you re-start the motor, just the hot fuel grain or a separate igniter?
K2
Check out:
http://www.hybrids.com/video/HY-II_restart.mpg
Very nice indeed ! I'd be happy to know how you light and relight your motor too.
I did discover in an earlier test that you can use the hot fuel grain to re-light if you don't wait too long. It seems that it doesn't work after just a few seconds. I'm using a separate spark-based igniter setup. I'll do a post about it soon.
So by "Spark-based" igniter setup you mean you are using an automotive spark plug to first decompose the N2O, and then ignite the fuel grain? Apologies if you consider this a too specific question to your design; but I'm also in the process of designing a restartable hybrid at my University and would love to know any lessons learned you've come across.
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