EXPjawa
Well-Known Member
I've touched on this before, but this a build thread for a rocket design I call "Binary Star". Its basically two BT55 tubed rockets siamesed together, sort a pair of strap-on SRBs with a primary core in the middle. I originally conceived of it as a quick & dirty way to plan with staggered deployment of parachutes, but eventually decided that I couldn't get enough stagger to make it beneficial with the normal range of ejection timing available. So I modified the design just to be a unique and different means of carrying a payload. Basic layout done:
Each "core" is an 18" BT55 tube with a 9" upper extension - I used 3 full standard tubes. The tubes are topped with 4.5" conical cones. The coupler on both sides is a baffle. Both tubes have 3.75" long 24mm mount, though I'll probably fly on C11's more than anything. The tubes are ported together above the baffles; the "alpha" tube carriers the recovery system, the "beta" tube has a bulkhead above the port. The beta cone is friction fitted to enclose a payload compartment. Overall rocket is 31.5" tall. After filling and most sanding:
One neat thing is that with layout, launch lugs are really easy to place and align. Also note, the attached RockSim file isn't up to date. It shows a previous iteration with dual parachutes and no bulkhead or port.
Each "core" is an 18" BT55 tube with a 9" upper extension - I used 3 full standard tubes. The tubes are topped with 4.5" conical cones. The coupler on both sides is a baffle. Both tubes have 3.75" long 24mm mount, though I'll probably fly on C11's more than anything. The tubes are ported together above the baffles; the "alpha" tube carriers the recovery system, the "beta" tube has a bulkhead above the port. The beta cone is friction fitted to enclose a payload compartment. Overall rocket is 31.5" tall. After filling and most sanding:
One neat thing is that with layout, launch lugs are really easy to place and align. Also note, the attached RockSim file isn't up to date. It shows a previous iteration with dual parachutes and no bulkhead or port.