Having some good experience with successful airstarted staging under my belt I thought I'd document my latest build for anyone interested in following along.
The BBXII is actually a four stage sounding rocket, but only three stages have fins since the fourth stage burns after being propelled beyond the atmosphere. I will be building it as a three stage model. There are other three stage BB variations but I happen to have the Rockets of the World 2002 supplement which contains the XII, so that's what I'm building, deal with it!
This will be a low power model, motors will be 29mm, 24mm, and 24mm. My last project was a high power three stage, 38mm to 29mm to 29mm, but the electronics were small enough I thought gee I could use them with low power. This project should be challenging due to smaller size, varying body tube diameters, and a few other constraints. In my high power model I used Raven3's near the fins for airstarting and a Stratologger in the sustainer for dual deployment, but this one will not have room for the Raven3 to be placed near the motors. I will have to bring down wiring from Raven3's placed higher in the bodies.
I started by drawing a full scale model in OpenRocket. I just used the scale data and created all the major components to the actual dimensions, not worrying about materials or anything like that yet.
The BBXII is actually a four stage sounding rocket, but only three stages have fins since the fourth stage burns after being propelled beyond the atmosphere. I will be building it as a three stage model. There are other three stage BB variations but I happen to have the Rockets of the World 2002 supplement which contains the XII, so that's what I'm building, deal with it!
This will be a low power model, motors will be 29mm, 24mm, and 24mm. My last project was a high power three stage, 38mm to 29mm to 29mm, but the electronics were small enough I thought gee I could use them with low power. This project should be challenging due to smaller size, varying body tube diameters, and a few other constraints. In my high power model I used Raven3's near the fins for airstarting and a Stratologger in the sustainer for dual deployment, but this one will not have room for the Raven3 to be placed near the motors. I will have to bring down wiring from Raven3's placed higher in the bodies.
I started by drawing a full scale model in OpenRocket. I just used the scale data and created all the major components to the actual dimensions, not worrying about materials or anything like that yet.