McDonnell HRH
| XHRH | |
|---|---|
| Role | Cargo helicopter |
| National origin | United States |
| Manufacturer | McDonnell Aircraft |
| Status | Cancelled; mockup phase only |
| Primary user | United States Marine Corps |
| Number built | 0 |
The McDonnell HRH, company designation Model 78, was a 1950s transport helicopter proposal for the United States Marine Corps (USMC) by McDonnell Aircraft, designed to operate from Commencement Bay-class escort carriers.