Overview
The finocyl grain is the lowest grain in the Hermes 2 Motor.
Manufacturing
This grain will require slightly modified casting hardware. The mandrel will be a foam core as demonstrated in the Monolithic Grain Test. For additional rigidity, and to reduce the amount of foam dissolved, a central support will be included. This might be PVC or aluminum tube 1.000 to 1.050 in OD 19 inches long.
The .dxf of the mandrel is here. 2 of these need to be foam cut. 18.5 inches long. This has been converted to a .dat file here.
The foam cutter will follow the following path:
The following .dxfs are for the casting hardware. They should be waterjet from 1/8in aluminum sheet.
Top Plate : Finocyl Casting Top.DXF
Finocyl Plate : Finocyl Casting Plate.DXF
Base Plate : Finocyl Casting Base.DXF
Manufacturing Tests
| Date | Mandrels Made | Results |
|---|---|---|
| November 28, 2018 | None | Tried feeds and voltages. Significant trouble gluing stock |
Todo
Acquire larger foam, or make foam gluing jig
Feed, speed, and voltage for foam cutter
waterjet end plates
tap end .plates
cut PVC pipe.