I am a part of a student organization that will be atempting to design, machine, and test fire an Annulare Aerospike engine. We are now in the info gathering phase and finding it difficult to locate informative and helpful information on the design part. If anyone has any ideas, please either reply to this or E-mail me. If there are other groups that are trying to build an annular aerospike then please get intouch so that we can help each other!! thanks in advance for the help!!!