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Nevertheless, we would not decrease the wall thickness since we want to avoid radial tore of the bolts.

Bolts

O - Rings

We changed After finding that the previous O-Ring Configuration had potentially dangerous attributes according to https://www.applerubber.com/oring-gland-calculator/#medium-search-field. I changed the O-rings to yield safe values and uploaded the changes to the repository. I changed the 229 and 228 O-Rings to 230 and 229 O rings. Verify all O rings including 121 and 122respectively, then the 121 and 122 O-Rings to 122 and 123. Below are the images of the O-Rings and the values in the calculator.

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O-Rings 1,2:

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O-Ring 3: (Best stretch Arrangement I was able to produce without changing the Forward closure groove diameter (Am I allowed to?)

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O-Ring 4:

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O-Ring 5:

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Igniter Grain

No Change, show open motor curve and talk about funny canted nozzles

Manufacturing

include drawings of all parts, where we get them from, and how to machine it

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Forward Retention

hei_fwd_retention.SLDDRW

• Use the water jet cutter to radially drill the holes for the screws
• Do not thread the screw holes, because the threads could mismatch with the ones in the forward closure

Igniter Nozzle

ig_nozz.SLDDRW

• Put two pieces of phenolic on the lathe, use it to get their dimensions right.
• Hand drill the canted holes in the nozzle
• Glue the phenolic pieces together

Igniter Grain

bt_igniter_grain.SLDDRW

• Cut the grain slowly with a drill by hand
• Extremely important to go slowly so as to not ignite the grain

Igniter Liner

ig_liner.SLDDRW

• Cut the liner to length with a saw

Phenolic Forward Closure

hei_fwd_closure.SLDDRW

• Use the water jet cutter to drill the holes
• Use the lathe for the grooves

Forward Closure

fwd_closure_hei.SLDDRW

• Use the new digital lathes for the curve because they can do tapers and complex geometries
• Put the closure on the mill for holes and bolts
• Thread the scew holes

Phenolic for Forward Closure Insulation

Phenolic for forward closure.SLDDRW

• Use the water jet cutter for the hole

Integration

Custom E-Matches

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• Use redundant matches to avoid failed ignition

Safety

• Be extremely careful when working with grains
• Exercise caution with machining tools

R2E

• Include R2E between the phenolic forward closure and the forward closure
• Put it between the igniter nozzle and forward closure
• Put it between the threaded rods and the phenolic closure