Wednesday, October 29, 2008

Testing a hybrid motor with a spike nozzle.



This is a great project. The hybrid motor uses a solid fuel and a gaseous or liquid oxidizer. Here the fuel is a clear acrylic tube that lets you see inside the chamber. Note how bright it is: the flame that comes out of a motor is often bright, but inside there must be far more radiation.

The spike nozzle, aerospike, uses atmospheric pressure and can help maintain high efficiency. Bell nozzles can only be built for a certain fairly small pressure range (altitude) and then they lose efficiency outside of it.

2 comments:

Johnathan said...

Another fine project from an aerospace engineering student at Cal Poly San Luis Obispo. (Full disclosure: that was my friend's senior project)

R2K, if you'd like to watch some video of students launching their own scratch built high power rockets, we have a youtube channel: http://www.youtube.com/user/calpolyspacesystems

DTH Rocket said...

That's really interesting! I'd read about aerospike nozzles in the book Rocket Propulsion Elements.