| Tail Number / N-Number | N621WC |
| Manufacturer | CLARK WILLIAM H |
| Model | CLARK AURORA |
| Manufacturer's Serial Number | 003 |
| Aircraft Type | Rotorcraft |
| 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 | ROTAX |
| Engine Model | 912UL |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 80 hp (60 kW) |
| Type of Registrant | Individual |
| Owner Name | CLARK WILLIAM H |
| Street | PO BOX 336 |
| City | MIAMI |
| State | TX |
| Zip Code | 79059-0336 |
| Region | Southwestern |
| County | Roberts County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2010-08-26 |
| Certificate Issue Date | 2020-07-17 |
| Last Action Date | 2020-07-17 |
| Expiration Date | 2027-07-31 |
| Status | Valid Registration |
| Mode S Code | 52015753 |
| Mode S Code Hex | A81BEB |