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- needlenose pliers
- 7/32 drill bit
11/10/24 - Post Tow Testing Discussion
Reefing Sizing + Shape
https://ntrs.nasa.gov/api/citations/20130011075/downloads/20130011075.pdf
- Current design
- Not mathematically possible to get 3 ft drogue from 9 ft main
- Tried to hold 8’ parachute closed with 0’ reefed diameter and max diameter is too big
- Currently reefed at bottom
- Need to find another method
- Orion parachute goes from 40 ft to 11 ft and reefs at the bottom once, with more of a “lightbulb” shape (potentially using less material or an extra line?)
Need to find a way to get more vertical “lightbulb” shape
- Reefing higher up
- Venting (how Orion does it? We are going to email people (Jared Daum jared.daum@nasa.gov) to ask)
- Orion has a top section (reefed max diameter) that does not expand much after disreefing. Stays similar and becomes the top of the parachute. Area under that is very narrow before disreefing and then expands drastically
- Use a 3 ft drogue and attach extra material to create the 9 ft main when disreefed
- Potentially connecting shroud lines to the bottom of the parachute rather than to a specific point
- Reefing line will still likely be at the bottom of the parachute
- Have multiple reefing sections
- To create the lightbulb shape
- Material might bulge in between reefed sections
\Wires
- Making sure ematch to long wire attachment is more secure (soldering, HEAT SHRINK)
- Need to determine why wire experienced force
- Make sure wire is long enough
- Make sure enough of wire comes out of bag so there isnt pulling before bag opens
Reefing Line Attachment
- Attach a longer wire to the reefing line which ties onto one of the loops (this should prevent cinching of the parachute when reefed)
- Do wind tunnel testing to make sure the loops can withstand force from reefing