¶ Introduction
The Recovery Bay carries the Recovery System.
¶ Definitions and Abbreviations
Definitions:
- REB: Recovery Bay
- AVB: Avionics Bays
- SM: Separation Mechanism
¶ Relevant Knowledge Needed
Previou Design:
You might want to read the documentation of the previous REB.
Nomenclature/list of pieces:
For a better understanding of the final design, here is the final list of pieces with there associated nomenclatures for 3Dx:
- 212201_Recovery_Tube
- 212202_Guiding_Tube
- 212203_Cap
- 212204_Centering_Ring
Relevant Requirements:
- 2024_C_SE_ST_RECOVERY-BAY_REQ_01 RE bay declaration of purpose
The RE bay shall host the RE systems of the LV. - 2024_C_SE_ST_RECOVERY-BAY_REQ_02Guiding tube diameter
The RE bay guiding tube diameter shall be [160][+/-10]mm. - 2024_C_SE_ST_RECOVERY-BAY_REQ_03 Useable length for RE
The length available for RE shall be [900][+/-10]mm. - 2024_C_SE_ST_RECOVERY-BAY_REQ_06 RE length
The RE bay shall have a length of [1000][+/-50]mm. - 2024_C_SE_ST_RECOVERY-BAY_REQ_07 Connection to REB
The RE bay shall have a coupling point on the upper end. - 2024_C_SE_ST_RECOVERY-BAY_REQ_08 Connection to RE systems
The RE bay shall provide an internal structural anchor point for the RE systems. - 2024_C_SE_ST_RECOVERY-BAY_REQ_09 RE structure mass
The total mass of the RE bay structure shall be [3600][+/-360]g. - 2024_C_SE_ST_RECOVERY-BAY_REQ_10 Structure type
The RE bay structure shall be internal so that its inside may be radially accessed.
¶ Design
Those parts are the spine of the REB. The Recovery Tube, made out of carbon fibers, is the outer tube (external diameter = 202 mm), whereas the Guiding Tube, made out of glass fibers, is the inner tube (external diameter = 160 mm) that holds the parachute.
The Cap closes the bottom of the guiding tube to witch it is glued. The hole is for the parachute ropes that are connected to the shockplate at the top of AVB. Some other holes for the avionics cables need to be included. It is 3D printed in Nylon.
The Centering Rings ensure the coaxiality of the Guiding and Recovery Tube and are glued to the Recovery Tube. They are 3D printed in plastic since they are not subject to any loads.
¶ Assembly
The REB without the parachute, the separationm mechanism and the coupler would look like this:
