PARTS & EQUIPMENT · F3
Spire 750
Tall printed rocket with revised sliding fits.
Cold-fit model. Not cleared for launch.
What you’ll print
The F3 fit set specifies the same matte PLA and print profile used for the fit samples. It includes a printed body, motor cartridge and cap, without a paper liner or motor tube.
Use the part-specific material and orientation in the build guide. The list below also includes clearly marked samples and alternatives; printing every row is not the same as building one model.
Browse the printed parts list
| Part | Qty | Material | Use | Assembly note |
|---|---|---|---|---|
R01-One-piece-tail | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Unchanged from Spire v 0.4; reuse your existing part if suitable. ONE PIECE: rear sleeve and all three fins. Flat aft end DOWN; all fin bases start on the bed. Self-supporting printed body; bond adjoining sections over R04 printed couplers. No separate fins, sockets or fin glue joints. Inspect vertical fin layers and flex-test the coupon. |
R02-Body-sleeve | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Unchanged from Spire v 0.4; reuse your existing part if suitable. Vertical, open ends. Structural printed body, 0.8 mm nominal wall. Join over printed R04 couplers with 15 mm engagement per side. Leave nose separation free. |
R03-Body-sleeve | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Unchanged from Spire v 0.4; reuse your existing part if suitable. Vertical, open ends. Structural printed body, 0.8 mm nominal wall. Join over printed R04 couplers with 15 mm engagement per side. Leave nose separation free. |
L01-Launch-lug | 2 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Unchanged from Spire v 0.4; reuse your existing part if suitable. Bore vertical as supplied. Align both lugs on the actual 4.763 mm launch rod before bonding. Check free sliding over entire rod. |
M02-Screw-on-retainer-cap | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Unchanged from Spire v 0.4; reuse your existing part if suitable. COLD-FIT ONLY. Non-foaming ASA; no validated heat/load/adhesive/flight rating. Retaining lip DOWN. Custom cap stops on cartridge shoulder and overlaps the case rim. New v 0.4 thread diameter: do not mix with v 0.3. Hand fit only; establish capture, removal and resistance to loosening. |
R04-Body-coupler-F2 | 2 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Print TWO. Outside diameter 41.50 mm, 0.10 mm total clearance in the existing 41.60 mm body bore. Keep 15 mm insertion per body section; mark the 30 mm coupler midpoint. Dry-fit before a sacrificial adhesive test. |
R05-Recovery-anchor-F2 | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Print ONE if replacing the original collar. Outside collar diameter follows B10. Cord holes and installation position stay the same. The fitted collar and cord system still need adhesive and load testing; no strength rating. |
N01-Hollow-nose-F2 | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | B10 outer shoulder 41.50 mm x 25 mm. The inner bore remains 39.70 mm for the supplied N05 insert. Keep the outer shoulder unglued and check smooth removal. Nose main outline/length unchanged. |
M01-Printed-motor-cartridge-F2 | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Print ONE only for cold-fit testing. The two outer locating bands follow B10 at 41.50 mm. Motor bore, forward stop and threads are unchanged; reuse the v 0.4 M02 cap. F1 gauges do not establish cartridge thermal, axial-load, adhesive, thread or flight performance. |
N02-Recovery-eye-cap-N05 | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Airframe part | Larger 39.65 mm N05 insert selected for this print package. Its physical fit is still pending. Check the four-notch gauge and the actual insert in the 39.70 mm nose bore. Only ONE insert is installed. Original eye and 2 mm disk thickness retained; no load rating. |
TEST-N05-four-notch-gauge | 1 | Same matte PLA, printer and profile as F1; cold-fit prototype only | Fit sample / alternative | Four notches on the raised pull tab. Test the 2 mm disk in the existing or F2 nose bore; the tab is not a recovery eye. |
No matching parts. Try a shorter term or include samples.
What you’ll need
Quantities apply to one model unless noted. Links identify the referenced item or specification; availability and substitutions need checking before purchase.
Airframe hardware
| Item | Qty | Specification | Selection status |
|---|---|---|---|
| Paper liner / paper motor tube / metal engine hook | 0 | None specified:printed body, printed motor cartridge and screw cap are experimental structural parts. Purchased motor casing remains intact. | Heat and deployment pressure unqualified |
Power system
| Item | Qty | Specification | Selection status |
|---|---|---|---|
| Commercial model rocket motor | 1 | 24 mm D12 family evaluation reference; nominal 70 mm case; modeled bore 24.30 mm. Keep commercial case intact. | Motor and delay not selected for launch |
| Manufacturer starter and plug | one per launch | Match the selected intact commercial motor instructions; not installed during cold-fit checks | Launch system not yet qualified |
Recovery and launch equipment
| Item | Qty | Specification | Selection status |
|---|---|---|---|
| Parachute | 1 | Suitable commercial parachute; size must be selected against measured mass, packing and descent requirements | Packing, descent and deployment unverified |
| Recovery shock cord / leader / attachments | 1 set | Compatible cord and leader; printed anchors and adhesive joints require tests; keep nose tethered | Specified for fit checks |
| Recovery protection | as required | Manufacturer-specified flame-resistant wadding or compatible protection | Specified for fit checks |
| Launch pad / blast deflector / controller | 1 set | Compatible electrical safety-interlock launch equipment with 3/16 inch (4.763 mm) rod. Align both lugs and check whole rod travel. | Rod length and exit-speed analysis pending |
Adhesives and supplies
| Item | Qty | Specification | Selection status |
|---|---|---|---|
| Adhesive | as fitted | Compatible printed-part adhesive; keep motor bore, threads and nose sliding surfaces free. Evaluate bonds on sacrificial coupons. | Specified for fit checks |
Check the revision included with your download before printing or ordering. Final fit, weight and operation depend on the actual materials and hardware you use.