1 ea 24-18-13 should fit, I think.View attachment 390209
All while maintaining that sweet, sweet symmetry!
I like it!
one thing to consider you may want to put a sheet or two of wadding forward of your booster parachute as well as aft, just to keep it from being singed by the sustainer motor as it lights.
I like it!
I had never considered “containing” my deployment pod INSIDE the booster body tube . I always just glued the pot on the outside. Gave it its own nose cone.
Looking good. I recommend an A8-3 or A8-5 on the sustainer.
Congrats.
Starship Superheavy looks cool, going to be rough to get stable, especially with those canards up front and those micro fins on the booster.
I think there is a good chance your system will deploy as designed.....BUTMurdnunoc, that is some awesome work! I've got a gap staged Big Bertha I've been working on, but I took a completely different approach for booster recovery. At first I was trying to squeeze a thin rubber tube into the gap between the 24mm core and the BT60 body to act as a spring to push the chute out, but that has proven to be too tight of a fit, so I am going to have a long kevlar cord taped to the bottom of the sustainer drag the parachute out. Hopefully, the little bit of grab from the tape isn't enough to throw off the course of the sustainer. For the next one, I am going to try reducing the diameter of the core tube partway up from 24mm to 18mm so the flame is focused more toward the center for the sustainer, and also to give me more room for the recovery system. Here are some shots of my setup:
Did you consider putting an internal nosecone on your parachute bay? The nosecone would protect your parachute from the exhaust plume of the sustainer, and the mass of the nosecone would help pull the chute out without having to rely on having a precise parachute roll that is tight enough, but no too tight.
With a streamer on a booster, it might help to have an external shock cord attached at the cg of the booster with spent engine. The body falls a little slower when suspended horizontally by the streamer.
BABAR: I have thought about that, and in addition to the high speed deployment, I still have limited space available to pack the parachute, so I might go with a long streamer. I'll sim the whole thing further after I'm done painting so I can get the weight exact and see what the deployment velocities look like. On a later project where I have sufficient room, I might try a nomex drogue with kevlar shroud lines to both take the sudden deceleration force and be able to stand up to the sustainer exhaust.
Mr. Rocket: unfortunately I have too little room inside to have a nose cone or other type of plug. What I'm going to do is layer a few pieces of regular paper wadding on top of the booster parachute (or streamer) to take the sustainer exhaust. The kevlar cord is 16 inches long before it pulls out the parachute/streamer, so by the time it comes out, it should be far enough back to not be burned. Hopefully.
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