| Tail Number / N-Number | N42HR |
| Manufacturer | HARMON JOHN M |
| Model | HARMON ROCKET II |
| Year Built | 1992 |
| Manufacturer's Serial Number | 007 |
| 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 | 0-540 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 250 hp (187 kW) |
| Type of Registrant | Individual |
| Owner Name | HARMON JOHN M |
| Street | 2201 COY AVE |
| City | BAKERSFIELD |
| State | CA |
| Zip Code | 93307-4447 |
| Region | Western-Pacific |
| County | Kern County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1992-05-23 |
| Certificate Issue Date | 1992-05-06 |
| Last Action Date | 2023-01-05 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 51175005 |
| Mode S Code Hex | A4FA05 |