Rendering of the final geometry of the rocket.
Rendering of the final geometry of the rocket.

Two of the components that were incorporated into the final design have been unavailable for a significant amount of time.  These components are the large airfoiled rail buttons and the Aerotech DMS M1350W motor.

The airfoiled rail buttons are now replaced with the standard, large rail buttons.  Luckily, since both styles of rail buttons use the same size hardware, no internal changes are needed to support them.  The change in vehicle weight is negligible due to this change as it is less than 0.01lb (0.04N).

Rendering of the fin can section subassembly showing the round rail buttons.
Rendering of the fin can section subassembly showing the round rail buttons.

The M1350W was replaced with a CTI Pro 75 M1670 motor.  This 5 grain motor will produce 374.9 lbs (1668N) of thrust on average over its 3.63 second burn.  Since this motor is a reload, it will be used with the Pro 75 5 grain case.  The loaded weight of this motor is 11.53 lbs (51.3N) compared to 10.6 lbs (47.2N) of the original motor.  It is also 32.04in (814mm) long compared to 25.12in (638mm).  This motor will protrude from the motor mount tube approximately 3.70in (94mm), however 1.75in (44.5mm) of this protrusion is only 1.88in (47.6mm) in diameter.  This should have a minimal effect on looping the shock cord through the upper U-bolt.  When investigating the effect of this change, it was noticed that the epoxy fillet on the bulkhead attached to the motor mount tube was on the wrong bulkhead.  This is now corrected in the render below.  The center bulkhead under the coupler is now epoxied to the motor mount tube.

Section view showing the corrected location of the epoxy fillet on the center bulkhead.
Section view showing the corrected location of the epoxy fillet on the center bulkhead.

Another change that was needed due to the original part not being available locally was the quick links used throughout the project.  Instead of the 2.75in (70mm) long, 3/8-16 thread quick links, a 2.375in (60mm) long, 5/16-18 thread quick link will be used.  These new quick links weigh 0.16lb (0.71N) compared to the 0.28lb (1.25N) of the original.  Their working limit is 1540lbs (6.85kN), which is comparable to the swivels used at both the main and drogue parachutes.  Also, due to line connection on the main parachute, an extra quick link will needed to connect the swivel to the parachute.  The total weight changes due to the change in quick link size and quantity is only 0.32lb (0.53N).

Bill of Materials

Click the part number in the table to either view the part’s drawing if it is a custom design, or to view the part on the supplier’s website if it is purchased.

Fin Can Section Subassembly – Revision 2
PART NUMBERDESCRIPTIONQTY.
1-001FIN MOUNT3
1-002THRUST PLATE1
1-003CUSTOM FIN3
1-004UPPER FIN BULKHEAD2
1-005CAMERA WINDOW1
1-006FIN CAN COUPLER CENTERING
RING, LOWER
1
1-007FIN CAN COUPLER CENTERING
RING, UPPER
1
1-008UPPER FIN CAN COUPLER BULKHEAD1
1-009MOTOR MOUNT TUBE1
1-010FIN CAN SECTION COUPLER1
1-011FIN CAN SECTION BODY TUBE1
1-027CAMERA SUPPORT STRUCTURE1
13063RAIL BUTTON, LARGE,
1.5IN RAIL
2
24069AERO PACK 75MM
FLANGED RETAINER
BODY AND RING
1
3414RASPBERRY PI ZERO W V1.3 CAMERA PACK - INCLUDES PI ZERO W (CASE NOT USED)1
2465ADAFRUIT POWERBOOST
1000C REV B - 2
1
258ADAFRUIT LITHIUM ION
POLYMER BATTERY - 3.7V
1200MAH
1
COM-11138SPARKFUN ROCKER
SWITCH - SPST ROUND
1
8054T15 (or similar)WIRE, 18GA STRANDED4ft
2418T119OIL-RESISTANT SOFT BUNA-N O-RINGS
1/16 FRACTIONAL WIDTH, DASH NUMBER 013
3
3043T634U-BOLT, 0.375-16
THREAD, 2.375IN HOLE
CENTER SPACING
1
90107A029316 STAINLESS STEEL WASHER
FOR 1/4IN SCREW SIZE, 0.281IN ID, 0.625IN OD
39
91247A635MEDIUM-STRENGTH GRADE 5 STEEL HEX HEAD SCREW
ZINC-PLATED, 3/8IN-16 THREAD SIZE, 2-3/4IN LONG, PARTIALLY THREADED
3
91845A02918-8 STAINLESS STEEL HEX NUT
1/4IN-20 THREAD SIZE
21
92141A03118-8 STAINLESS STEEL WASHER
FOR 3/8IN SCREW SIZE, 0.406IN ID, 0.875IN OD
19
92196A14618-8 STAINLESS STEEL SOCKET HEAD SCREW
6-32 THREAD SIZE, 3/8IN LONG
12
92240A54118-8 STAINLESS STEEL HEX HEAD SCREW
1/4IN-20 THREAD SIZE, 7/8IN LONG
18
92703A30418-8 STAINLESS STEEL TORX FLAT HEAD SCREWS
8-32 THREAD SIZE, 3/8IN LONG
9
92703A31018-8 STAINLESS STEEL TORX FLAT HEAD SCREWS
8-32 THREAD SIZE, 3/4IN LONG
6
92703A41418-8 STAINLESS STEEL TORX FLAT HEAD SCREWS
1/4IN-20 THREAD SIZE, 1-1/4IN LONG
2
92865A623MEDIUM-STRENGTH GRADE 5 STEEL HEX HEAD SCREW
ZINC-PLATED, 3/8IN-16 THREAD SIZE, 7/8IN LONG
3
94510A360BRASS SCREW-TO-EXPAND INSERTS FOR PLASTICS
FLANGED, M2 X 0.4 MM THREAD SIZE
8
94510A370BRASS SCREW-TO-EXPAND INSERTS FOR PLASTICS
FLANGED, M2.5 X 0.45 MM THREAD SIZE
6
94842A103MEDIUM-STRENGTH STEEL FLANGE NUT
GRADE 5, ZINC-PLATED, 3/8IN-16 THREAD SIZE
9
94879A104OFF-WHITE NYLON PHILLIPS SCREWS
M2 X 0.4 MM THREAD, 8 MM LONG
8
94879A876OFF-WHITE NYLON PHILLIPS ROUNDED HEAD SCREWS
M2.5 X 0.45 MM THREAD, 8 MM LONG
4
98007A110ADHESIVE-MOUNT NUT
ZINC-PLATED STEEL, 8-32 THREAD SIZE
12
98007A200ADHESIVE-MOUNT NUT
ZINC-PLATED STEEL, 1/4IN-20 THREAD SIZE
2
98750A458GRADE B7 MEDIUM-STRENGTH STEEL THREADED ROD
3/8IN-16 THREAD SIZE, 27.25IN LONG
3
105 Epoxy Resin/205 Fast HardenerEPOXY FILLET, AROUND MOTOR MOUNT TUBE1
Main Parachute Bay Subassembly – Revision 2
PART NUMBERDESCRIPTIONQTY.
1-012MAIN PARACHUTE BAY BODY TUBE1
18ft ParachuteROCKETMAN PARACHUTE - STANDARD - 18FT1
30ft WebbingROCKETMAN SHOCK CORD - 30FT1
15ft WebbingROCKETMAN SHOCK CORD - 15FT1
SW-15001500LB SWIVEL1
29314SUNWARD 18IN ORANGE NOMEX PARACHUTE PROTECTOR - APOGEE 293141
29615NYLON SHEAR PINS6
8947T27OVAL SHAPED THREADED CONNECTING LINK, TYPE 316 STAINLESS STEEL, 5/16" THICKNESS, 3/8" OPENING, 2400LB CAPACITY - OR SIMILAR2
92703A31018-8 STAINLESS STEEL TORX FLAT HEAD SCREWS, 8-32 THREAD SIZE, 3/4" LONG6
Electronics Bay Subassembly – Revision 2
PART NUMBERDESCRIPTIONQTY.
1-013ELECTRONICS BAY COUPLER1
1-014ELECTONICS BAY PORT BAND1
1-015OUTER BULKHEAD2
1-016INNER BULKHEAD2
1-017ELECTRONICS SLED GUIDE2
1-018ELECTRONICS BAY PLATE1
1-019ELECTRONICS SLED1
3043T634U-BOLT, 0.375-16 THREAD, 2.375IN HOLE CENTER SPACING2
4880K842STANDARD-WALL PVC PIPE FITTING FOR WATER, PLUG WITH EXTERNAL HEX DRIVE STYLE, 1/2 SOCKET MALE4
7130K31ZIP TIE6
8233T32COMMUNICATION AND SECURITY SYSTEM CABLE, SHIELDED RISER-RATED, FOUR 22-GAUGE WIRES3ft
8947T27OVAL SHAPED THREADED CONNECTING LINK, TYPE 316 STAINLESS STEEL, 5/16" THICKNESS, 3/8" OPENING, 2400LB CAPACITY - OR SIMILAR2
90107A029316 STAINLESS STEEL WASHER
FOR 1/4IN SCREW SIZE, 0.281IN ID, 0.625IN OD
16
90675A005STEEL LOCKNUT WITH EXTERNAL-TOOTH LOCK WASHER, ZINC-PLATED, 4-40 THREAD SIZE8
91841A00918-8 STAINLESS STEEL HEX NUT, 8-32 THREAD SIZE8
91845A02918-8 STAINLESS STEEL HEX NUT, 1/4"-20 THREAD SIZE16
92314A19918-8 STAINLESS STEEL HEX HEAD SCREWS, 8-32 THREAD SIZE, 1" LONG8
92671A009BRASS HEX NUT, 8-32 THREAD SIZE8
92741A120BRASS FLANGED KNURLED-HEAD THUMB NUT, 8-32 THREAD SIZE8
92916A335BRASS WASHER FOR NUMBER 8 SCREW SIZE, 0.172" ID, 0.375" OD32
93135A276OFF-WHITE NYLON PAN HEAD SCREWS PHILLIPS, 4-40 THREAD, 1/2" LONG8
93465A199BRASS SOCKET HEAD SCREW, 8-32 THREAD SIZE, 1" LONG8
94639A402OFF-WHITE NYLON UNTHREADED SPACER, 3/8" OD, 3/8" LONG, FOR NUMBER 8 SCREW SIZE4
94639A704OFF-WHITE NYLON UNTHREADED SPACER, 3/16" OD, 3/16" LONG, FOR NUMBER 4 SCREW SIZE8
94744A224ZINC-PLATED STEEL WASHER FOR SOFT MATERIAL, NUMBER 8 SCREW SIZE16
9600K23SBR RUBBER PUSH-IN GROMMET, FOR 5/16" ID AND 3/32" MATERIAL THICKNESS4
98007A110ADHESIVE-MOUNT NUT, ZINC-PLATED STEEL, 8-32 THREAD SIZE6
99065A120GRADE B16 MEDIUM-STRENGTH STEEL THREADED ROD, 1/4"-20 THREAD SIZE4
8054T15WIRE, 18GA STRANDED4ft
69665K72EXTRA-GRIP RING TERMINALS, NONINSULATED, FOR 22-18 GAUGE AND NUMBER 8 SCREW8
RRC3XRRC3 XTREME ALTIMETER2
COM-11972METAL LATCHING PUSHBUTTON, BLUE LED1
COM-11974METAL LATCHING PUSHBUTTON, YELLOW LED1
COM-10969RESISTOR, 220Ω, 1/4W (FROM ASSORTED RESISTOR KIT)2
PRT-09353HEAT SHRINK, ASSORTED COLORS AND SIZES8in
16-02-0077SL CRIMP TERMINAL, SERIES 70021, MALE, WITH 0.38µM SELECTIVE GOLD (AU) PLATED CONTACT, 24-30 AWG4
50-57-9404SL CRIMP HOUSING, SINGLE ROW, VERSION G, POSITIVE LATCH, 4 CIRCUITS1
70058-0087SL CRIMP TERMINAL, FEMALE, 22-24 AWG, WITH 0.38µM SELECTIVE GOLD (AU) PLATED CONTACT4
70107-0003SL WIRE-TO-WIRE CRIMP HOUSING, SINGLE ROW, VERSION A, WITHOUT MOUNTING EARS, 4 CIRCUITS1
N/A2S 7.4V 450MAH 20C LIPO BATTERY PACK2
N/A20 AWG JST PLUG CONNECTORS, 2 PIN MALE AND FEMALE WITH WIRE LEADS, SET OF 10 PAIRS2
105 Epoxy Resin/205 Fast HardenerEPOXY FOR ADHESIVE NUTS6
Nosecone and Drogue Parachute Subassembly – Revision 2
PART NUMBERDESCRIPTIONQTY.
1-0225.5:1 VON KARMAN NOSE CONE1
1-023NOSE CONE COUPLER1
1-024NOSE CONE OUTER CENTERING
RING
1
1-025NOSE CONE INNER CENTERING
RING
1
1-026DROGUE PARACHUTE TUBE1
1-029NOSE CONE OUTER CENTERING
RING, UPPER
1
1-030NOSE CONE INNER CENTERING
RING, UPPER
1
Classic 44SKYANGEL PARACHUTE - 44IN1
15ft WebbingROCKETMAN SHOCK CORD - 15FT1
30ft WebbingROCKETMAN SHOCK CORD - 30FT1
29314SUNWARD 18IN ORANGE NOMEX PARACHUTE PROTECTOR - APOGEE 293141
SW-15001500LB SWIVEL1
FBP40-NATMAD COW 4IN G10 AIRFRAME PLATE1
3043T634U-BOLT, 0.375-16
THREAD, 2.375IN HOLE
CENTER SPACING
1
8947T27OVAL SHAPED THREADED CONNECTING LINK, TYPE 316 STAINLESS STEEL, 5/16" THICKNESS, 3/8" OPENING, 2400LB CAPACITY - OR SIMILAR1
90107A029316 STAINLESS STEEL WASHER
FOR 1/4IN SCREW SIZE, 0.281IN ID, 0.625IN OD
12
91845A02918-8 STAINLESS STEEL HEX NUT 1/4IN-20 THREAD SIZE10
92240A54118-8 STAINLESS STEEL HEX HEAD SCREW
1/4IN-20 THREAD SIZE, 7/8IN LONG
1
92703A31018-8 STAINLESS STEEL TORX FLAT HEAD SCREWS
8-32 THREAD SIZE, 3/4IN LONG
6
98007A110ADHESIVE-MOUNT NUT
ZINC-PLATED STEEL, 8-32 THREAD SIZE
6
99065A120GRADE B16 MEDIUM-STRENGTH STEEL THREADED ROD, 1/4-20 THREAD SIZE, 10.25IN LONG3
105 Epoxy Resin/205 Fast HardenerEPOXY FILLETS4
Final Design – Revisions Due to Part Availability

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