| Tail Number / N-Number | N621H |
| Manufacturer | HILL JOHN CRANDALL |
| Model | RV 4 |
| Year Built | 1991 |
| Manufacturer's Serial Number | RV4548 |
| 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 | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | BADLYANS DENNIS |
| Street | 268 MARBLEDALE RD |
| City | TUCKAHOE |
| State | NY |
| Zip Code | 10707-1809 |
| Region | Eastern |
| County | Westchester County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1992-06-09 |
| Certificate Issue Date | 2020-06-08 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 52015243 |
| Mode S Code Hex | A81AA3 |