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Description
| Manufacturer: | Piasecki (Vertol) | |
| Base model: | H-21 | |
| Designation: | YH-21 | |
| Nickname: | Workhorse | |
| Designation System: | U.S. Air Force | |
| Designation Period: | 1948-Present | |
| Basic role: | Helicopter | |
| Status: | Prototype | |
| See Also: | ||
Specifications
| Not Yet Available |
Known serial numbers
