Rideshare payload user’s guide october 2022
Download 2.78 Mb. View original pdf
|
- Navigate this page:
- 4.1.3 CABLE TIES
- 4.1.4 PRESSURE VESSELS
| 4.1.2 FASTENERS Any fasteners used on the primary structure or used to hold external components onto the Payload that are removed after acceptance testing must meet the following requirements Fasteners have a diameter of .190 inch (#10 size, metric 5 mm) or larger. Fasteners have a form of retention that is not reliant on preload to function (e.g. prevailing torque feature like distorted thread locking nut or patched fastener, lock wire/lock cable, cotter pin, thread locker with proper application process check, etc) Fasteners be installed by means of an installation procedure that uses a calibrated torque tool, measures installation torque, and verifies retention is functional (e.g. measures prevailing torque and compares to limits, visual verification on lock wire/cable, test coupon for thread locker to test breakaway torque, etc) Fasteners have a minimum acceptable thread protrusion beyond the end of a nut or nut plate of one thread pitch width. This will insure that all of the fully formed threads on the fastener can carry load and that the prevailing torque feature (if present) is engaged properly. 4.1.3 CABLE TIES All cable ties intended for flight must be non-removable preferably made from Nylon 6/6 or ETFE/Tefzel and must be included in vibration testing. Removable cable ties are only for temporary use during in-process harness routing and must be removed before flight. Contact SpaceX for recommended part numbers. 4.1.4 PRESSURE VESSELS A pressure vessel is any system containing more than 2000 J of stored energy (pneumatic and chemical energy) or a MEOP greater than 100 PsiD [6.9 barD]. Systems that contain pressure but do not meet the above are considered pressure components or pressure systems. Pressure vessel classification and use Type 1: All metallic. Conforms to AIAA-S-080 (current approved release) Type 2: Metallic liner with composite hoop. Conforms to AIAA-S-081 (current approved release) Type 3: Metallic liner with full, wound composite overwrap. Conforms to AIAA-S-081 (current approved release) Type 4: Nonmetallic liner with full, wound composite overwrap. Conform to applicable sections of AIAA-S-081 until such a time as AIAA G is fully released. o Use is not recommended. o Some restrictions on fluid eligibility apply. See 4.1.4.1. Type 5: All-Composite pressure vessels (liner-less) o Use is not recommended. o Some restrictions on fluid eligibility apply. See 4.1.4.1. Download 2.78 Mb. Share with your friends:
|