| Tail Number / N-Number | N639BC |
| Manufacturer | CHRISTIAN WILLIAM P |
| Model | C1 |
| Year Built | 2014 |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Gyroplane |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | SUBARU |
| Engine Model | ALL MDLS A/B |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 400 hp (298 kW) |
| Type of Registrant | Individual |
| Owner Name | CHRISTIAN WILLIAM P |
| Street | 791 W PLACITA NUEVA |
| City | GREEN VALLEY |
| State | AZ |
| Zip Code | 85614-2829 |
| Region | Western-Pacific |
| County | Pinal County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2014-06-11 |
| Certificate Issue Date | 2011-03-25 |
| Last Action Date | 2023-01-18 |
| Expiration Date | 2030-03-31 |
| Status | Valid Registration |
| Mode S Code | 52057507 |
| Mode S Code Hex | A85F47 |