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SKU: SR-APX-029
APEX SR-29
High Performance 3D-Printed Sounding Rocket Kit
29mm sounding rocket kit — PETG 3D-printed airframe, F–H class, est. 900–3,500 ft
- ▸ 29mm motor mount — F through H class
- ▸ 3D-printed PETG airframe — all flight-critical components
- ▸ Precision elliptical nose cone
- ▸ 2.50" payload bay with 10" tube
- ▸ Conical transition 2.50" → 1.34"
- ▸ Four swept-delta fins with root tabs — no jigs required
- ▸ Estimated altitude: ~900 ft (F39) to 3,500+ ft (H128)
Price
$24.99
Available: 7 in stock
Product Description
The APEX SR-29 is a high-performance sounding rocket based on the classic Enerjet 1340/20 design.
All structural components are 3D-printed in PETG for maximum strength and durability.
The kit includes a precision elliptical nose cone, a 2.50" payload bay tube, a conical transition section,
a 1.34" main body tube with four pre-slotted fin positions, a 29mm motor mount with integrated thrust ring
and aft retainer lip, and four swept-delta fins with root tabs that insert directly into the body tube slots
— no guesswork or jigs required. Estimated altitude ranges from approximately 900 ft on an F39 to over
3,500 ft on an H128, depending on motor selection and site conditions.
Overall Dimensions
| Dimension | Imperial | Metric / Note |
|---|---|---|
| Overall Assembled Length | 28.47 in | 723.1 mm |
| Body Tube Outer Diameter | 1.34 in | 34.0 mm |
| Payload Section Outer Diameter | 2.50 in | 63.5 mm |
| Motor Mount Bore | 1.14 in | 29.0 mm (standard 29mm) |
| Fin Tip-to-Tip Span | 7.07 in | 178.0 mm |
| Estimated Liftoff Weight | ~3.5 oz | ~100 g (empty, no motor) |
Motor Compatibility
| Motor | Class | Avg Thrust | Total Impulse | Est. Altitude | Notes |
|---|---|---|---|---|---|
| Cesaroni F39-6T | F | 39 N | 5.3 Ns | ~900 ft | Light wind, small field |
| AeroTech F52-8T | F | 52 N | 9.4 Ns | ~1,200 ft | General sport flying |
| AeroTech G76-7G | G | 76 N | 15.6 Ns | ~1,900 ft | Open field recommended |
| AeroTech G138-6W | G | 138 N | 28.0 Ns | ~2,600 ft | Open field required |
| AeroTech H128-6W | H | 128 N | 78.0 Ns | ~3,500 ft | NAR L1 cert required |
Kit Components
| # | Component | Qty | Description | Material |
|---|---|---|---|---|
| 1 | Nose Cone | 1 | Elliptical nose cone with shoulder | PETG |
| 2 | Payload Tube | 1 | Payload bay tube, 10.00" length | PETG |
| 3 | Transition | 1 | Conical transition 2.50" → 1.34" | PETG |
| 4 | Main Body Tube | 1 | Main airframe tube with 4× fin slots | PETG |
| 5 | Motor Mount | 1 | 29mm motor mount with thrust ring + retainer | PETG |
| 6 | Swept-Delta Fin | 4 | Swept-delta fin with root tab | PETG |