Rocket engines contain oxidizing crystals so, to my understanding, they should burn in a low pressure environment no problemo. However, there is a problem in igniting it. I scoured the internet for a simple solution and after discovering this project, I learned that match heads contain an oxidizer as well, and they should ignite when secured to an overheating resistor. From childhood shenanigans, I knew that match heads could be ground into a powder and mixed with a little water to create a paste. I coated a few 10 ohm resistors with varying amounts of this paste and allowed them to dry. Though a little fragile, the homemade igniters lit up easily when a 9v battery was applied to the resistor. The igniters were a little too wide to fit inside of the standard Estes rocket engines, so I used a drill bit to manually widen them a bit. In an effort to conserve resources, testing the igniters with an actual launch will have to wait until I have an opportunity to test the igniters with an altimeter simultaneously.