| 43-46521 | Sikorsky Hoverfly R-4B | ||
| 43-45531 | Sikorsky Hoverfly HOS-1 | ||
| 39034 | Sikorsky Hoverfly HNS-1 | ||
| 43-45473 | Sikorsky Hoverfly R-6 | ||
| 43-46592 | Sikorsky Hoverfly R-4B | ||
| 43-46503 | Sikorsky Hoverfly R-4B | ||
| Unknown | Sikorsky Hoverfly R-4 | ||
| KL110 | Sikorsky Hoverfly I | Ex 43-46596. Composite, with many parts from KK995 | |
| 39047 | Sikorsky Hoverfly HNS-1 | ||
| 43-45379 | Sikorsky Hoverfly R-6A | ||
| 43-45390 | Sikorsky Hoverfly III | ||
| 41-18874 | Sikorsky Hoverfly XR-4C | ||
| 43 | 43-46506 | Sikorsky Hoverfly R-4B | |
| 99-22377 | 43-46534 | Sikorsky Hoverfly R-4B | |
| 102 | 43-46565 | Sikorsky Hoverfly R-4B | |
| 124 | 43-45480 | Sikorsky Hoverfly R-6A |