To start off I'm wanting to build the X-15 from Apogee. I'm sorry but I would like to build it to use a 24mm motor or motors. I'm thinking a two or three motor cluster would do the job to get this big bird into the sky.

I don't want to send it so high it goes out of sight. Three to four hundred feet for me is fine. I would like to use ESTES Motors if possible and keep it stable.

Can anyone chime in here and give me some constructive advice on the size of motors and the number of motors to use in the cluster.

Thanks in advance.