| CP Method: | Rocksim/Rocksim | 
| CP Position From Front: | 6.88 inches | 
| Decals: | Waterslide | 
| Diameter: | 0.91 inches | 
| Fin Material: | Balsa | 
| Fin Span: | 4.90 inches | 
| Length: | 9.00 inches | 
| Manufacturer: | Semroc ![]()  | 
| Model: | KV-31 | 
| Nose Cone Material: | Balsa | 
| Power: | Low-Power | 
| Product Type: | Kit | 
| Recommended Motors: | 1/2A6-4, B6-6, C6-7 | 
| Recovery: | Streamer | 
| Skill Level: | 2 | 
| Status: | In-Production | 
| Style: | Multi-Stage | 
| Tags: | Family:Centuri:Firefly | 
| Weight: | 4.00 ounces | 
Brief: Semroc brings back another Centuri classic with this one, hailed as the world's smallest two-stage rocket in it's heyday around 1968. Faithfully reproduced right down to the original tube sizes, this kit will be a fun build for the nostalgia buff, though modern day flights will prove problematic. Construction: The kit for this review was graciously provided by B ...
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