The use of hybrid engines within the high power amateur rocket building community has only come about in the last few years. With more kits now being available and the cost savings of switching from HPR solids to the reusable hybrid, it is seeing its popularity grow.

If your handy with a lathe you can even build your very own hybrid for your model rockets using the plans from MicroHybrid.com!

I am in the process of building one, checkout my microhybrid page.