Ultralightweight High capacity Drum

This is a Carbon Fiber Ultra Light Weight Rassor collection Drum.
Two drums are used per side with them positioned 180 degrees out of phase or in a counter rotating arrangement.

This design is well suited to pickup and discharge in any gravity environment as those actions are gravity indepenendent.

The safety Factor for the Design with a 200lb load on the digging teeth is 3.64.

Maximum Displacement is .15mm which translates to a very strong and very stiff design that can handle tooth loadings in excess of 600lbs

Details:
OD: 450mm
Overall Width: 359mm
Cutting Width: 175 mm
Cutting Edges: 2
Cut depth: aprox. 20mm
Mass: 2 drums, 1.928kg (964g/drum)

Capacity: (note includes 30mm allowance for central drive shaft) See Images for Min Max Volume configuration
Internal Volume(maximum, 2 Drums, 180 degree phased at Top and bottom): 35.6liters(15.4L and 20.2L)
Max individual Cartridge Fill Ratio: 99%, 20.94L (scoop at horizontal upside)
Expected Maximum Fill Ratio: 96.4%, 20.2L at upright position
Minimum Individual Cartridge Fill Ratio: 74%, 15.4L(scoop at bottom)
Combined overall Fill ratio: 85% (combined 2 scoops at 180degree offsets(96.4%, 74%)


Materials:
Side Plates: GFRP
Drum Shell: GFRP
Scoop Head: GFRP
Teeth: Titanium, Riveted
Rivets: Aluminum

Construction:
Sides and Shell: Bonded
Scoop and Shell: Bonded
Scoop and Teeth: Riveted

Design Features:
Cartridge design:
a) allows for quick swap out in the event of damage or obstruction.
b) Reduces chance of total loss of function of a unified drum assembly due to damage or obstruction
c) simplifies construction while maximizing material properties

GFRP Construction:
Removes need for internal structures to maximize storage and minimize potential build up and blockages

Offset design:
self regulating depth of cut

Single cutting edges:
Increase available shearing force

Radiused cutting edge:
Reduce Digging in, uses a shearing action to remove material rather than an breaking digging action reducing chance of grabbing.
Regolith is removed in thin layers(See Attached DPM analysis)

Manufacture:
Minimum component count(6)
Manufacture methods are common and well known
Simple and quick assembly of components

Additional Notes;
Oversize scoop and tunnel vs cutting depth reduce chance of Blockage or jamming approximately 3 times larger than designed depth of cut, which is similar you what the current Rassor System has found most successful.

Additionally reduced number of rotations for Discharge.