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SKU: SR-ZNT-013
ZENITH SR-13
High Performance 3D-Printed Sounding Rocket Kit
29mm sounding rocket kit with Von Karman nose cone — PETG 3D-printed airframe, F–H class, est. 700–3,200 ft
- ▸ 29mm motor mount — F through H class
- ▸ 3D-printed PETG airframe — all flight-critical components
- ▸ Von Karman (Haack S=0) nose cone for minimum wave drag
- ▸ 2.50" payload bay with 8" tube
- ▸ Smooth Haack-profile transition 2.50" → 1.34"
- ▸ Four trapezoid fins with root tabs
- ▸ Superior stability margin vs. single-diameter designs
- ▸ Estimated altitude: ~700 ft (F39) to 3,200+ ft (H128)
Price
$24.99
Available: 5 in stock
Product Description
The ZENITH SR-13 is a high-performance 3D-printed sounding rocket based on the classic Enerjet 1340 design.
All structural components are manufactured in PETG for strength and durability.
The kit includes a precision Von Karman (Haack S=0) nose cone for minimum wave drag, a large 2.50" payload bay tube,
a smooth Haack-profile transition section stepping down to the 1.34" airframe, and four classic trapezoid fins
with root tabs. A 29mm motor mount with thrust ring is nested inside the main body tube. The two-diameter
airframe gives the ZENITH SR-13 its distinctive sounding-rocket silhouette and superior stability margin
compared to single-diameter sport designs. Estimated altitude ranges from approximately 700 ft on an F39 to
over 3,200 ft on an H128, depending on motor and site conditions.
Overall Dimensions
| Dimension | Imperial | Metric / Note |
|---|---|---|
| Overall Assembled Length | 28.00 in | 711.2 mm |
| Payload Section Outer Diameter | 2.50 in | 63.5 mm |
| Main Body Outer Diameter | 1.34 in | 34.0 mm |
| Motor Mount Bore | 1.14 in | 29.0 mm (standard 29mm) |
| Fin Tip-to-Tip Span | 8.34 in | 211.8 mm |
| Estimated Liftoff Weight | ~5.5 oz | ~156 g (empty, no motor) |
Motor Compatibility
| Motor | Class | Avg Thrust | Total Impulse | Est. Altitude | Notes |
|---|---|---|---|---|---|
| Cesaroni F39-6T | F | 39 N | 5.3 Ns | ~700 ft | Small field, light wind conditions |
| AeroTech F52-8T | F | 52 N | 9.4 Ns | ~1,000 ft | General sport flying |
| AeroTech G76-7G | G | 76 N | 15.6 Ns | ~1,700 ft | Open field recommended |
| AeroTech G138-6W | G | 138 N | 28.0 Ns | ~2,300 ft | Open field required |
| AeroTech H128-6W | H | 128 N | 78.0 Ns | ~3,200 ft | NAR Level 1 certification required |
Kit Components
| # | Component | Qty | Description | Material |
|---|---|---|---|---|
| 1 | Nose Cone | 1 | Von Karman (Haack S=0) nose cone with shoulder | PETG |
| 2 | Payload Tube | 1 | Payload bay tube, 8.00" length | PETG |
| 3 | Haack Transition | 1 | Haack-curve transition 2.50" → 1.34" | PETG |
| 4 | Main Body Tube | 1 | Main airframe tube, 13.00" with fin root slots | PETG |
| 5 | Motor Mount | 1 | 29mm motor mount with thrust ring | PETG |
| 6 | Trapezoid Fin | 4 | Trapezoid fin with root tab | PETG |