| Tail Number / N-Number | N621WD |
| Manufacturer | MARTIN TOM |
| Model | HARMON ROCKET II |
| Year Built | 1998 |
| Manufacturer's Serial Number | 159 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IO-540 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | LLC |
| Owner Name | WADDY AVIATION LLC |
| Street | 110 TEMPLE MOUND RD |
| City | CRESCENT CITY |
| State | FL |
| Zip Code | 32112-4652 |
| Region | Southern |
| County | Putnam County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2001-01-31 |
| Certificate Issue Date | 2019-09-25 |
| Last Action Date | 2022-04-12 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 52015754 |
| Mode S Code Hex | A81BEC |