| Tail Number / N-Number | N721R |
| Manufacturer | RYAN AERONAUTICAL |
| Model | ST3KR |
| Year Built | 1942 |
| Manufacturer's Serial Number | 1840 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | FAIRCHILD |
| Engine Model | 6-440-C5 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 200 hp (149 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | LLC |
| Owner Name | CP AIR LLC |
| Street | 500 DISCOVERY PKWY STE 375 |
| City | SUPERIOR |
| State | CO |
| Zip Code | 80027-8641 |
| Region | Northwest Mountain |
| County | Boulder County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2006-11-30 |
| Certificate Issue Date | 2018-06-15 |
| Last Action Date | 2021-01-20 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 52324272 |
| Mode S Code Hex | A9A8BA |