USMC version of the HO4S-1 with P&W R-1340-57 Wasp engine for eight troops, 60 built, plus one static airframe used for testing. 
List of Operators of Sikorsky HRS-1 | |
| From | Organisation with model HRS-1 | ||
| 1951 |
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| 1953 |
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| 1954 |
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| 1957 |
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| Construction Numbers on database of HRS-1 | ||||||
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Construction Numbers | Help Us | |
| C/N | Year | History | ||
| Filter | ||||
| 55-017 | 1951 |  127783,N4781S | ||
55-018  | 1951 | 127784 | ||
| 55-019 | 1951 | 127785 | ||
| 55-020 | 1951 | 127786,N4779S,N9013R,XB-WAV | ||
| 55-021 | 1951 | 127787,N4780S | ||
| 55-022 | 1951 | 127788 | ||
 | 55-023 | 1951 |    ,127789,51-17663 | |
| 55-024 | 1951 | 127790,51-17664 | ||
| 55-025 | 1951 | 127791 | ||
| 55-026 | 1951 | 127792 | ||
| 55-027 | 1951 | 127793,N4597CJ,N49557S | ||
| 55-028 | 1951 | 127794 | ||
| 55-029 | 1951 | 127795 | ||
| 55-030 | 1951 | 127796 | ||
| 55-031 | 1951 | ,127797,51-17662 | ||
| 55-032 | 1951 | 127798 | ||
| 55-033 | 1951 | 127799,N2798 | ||
| 55-035 | 1951 | 127800 | ||
| 55-036 | 1951 | 127801 | ||
| 55-037 | 1951 | 127802 | ||
| 55-038 | 1951 | 127803 | ||
| 55-039 | 1951 | 127804 | ||
| 55-040 | 1951 | 127805,CF-MOT | ||
| 55-041 | 1951 | 127806 | ||
| 55-042 | 1951 | 127807 | ||
| 55-043 | 1951 | | ||
| 55-044 | 1951 | 127808 | ||
| 55-045 | 1951 | 127809 | ||
| 55-046 | 1951 | 127810 | ||
| 55-047 | 1951 | 127811 | ||
| 55-048 | 1951 | 127812 | ||
| 55-049 | 1951 | 127813 | ||
| 55-050 | 1951 | 127814 | ||
| 55-051 | 1951 | 127815 | ||
| 55-052 | 1951 | 127816 | ||
| 55-053 | 1951 | 127817 | ||
| 55-054 | 1951 | 127818,51-17665 | ||
| 55-055 | 1951 | 127819 | ||
55-056  | 1951 |  127820,3007 | ||
| 55-057 | 1951 | 127821 | ||
| 55-058 | 1951 | 127822 | ||
| 55-059 | 1951 | 127823,N6872C | ||
| 55-060 | 1951 | 127824 | ||
| 55-061 | 1951 | 127825 | ||
| 55-062 | 1951 | 127826 | ||
| 55-063 | 1951 | 127827 | ||
| 55-066 | 1951 | 127828 | ||
| 55-067 | 1951 | 127829 | ||
| 55-068 | 1951 | 127830,N90009,N9009R | ||
| 55-069 | 1951 | 127831,N74125,N74125J | ||
| 55-070 | 1951 | 127832,51-17666 | ||
| 55-071 | 1951 | 127833 | ||
| 55-072 | 1951 | 127834 | ||
| 55-073 | 1951 | 127835 | ||
| 55-074 | 1951 | 127836 | ||
| 55-077 | 1951 | 127837 | ||
| 55-078 | 1951 | 127838 | ||
| 55-079 | 1951 | 127839,N90010,N9010R,XB-WOJ | ||
| 55-080 | 1951 | 127840 | ||
| 55-081 | 1951 | 127841 | ||
| 55-082 | 1952 | 127842 | ||