| Tail Number / N-Number | N6400S |
| Manufacturer | HOCHMUTH HAROLD W |
| Model | RV-4/HARMON ROCKT II |
| Year Built | 1999 |
| Manufacturer's Serial Number | 4272/218 |
| 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) |
| Kit Manufacturer | VANS AIRCRAFT INC |
| Kit Model | RV-4 |
| Type of Registrant | Co-Ownership |
| Owner Name | LEPPER MICHAEL |
| Other Names |
|
| Street | 46373 HIGHWAY 72 |
| City | WARD |
| State | CO |
| Zip Code | 80481-9614 |
| Region | Northwest Mountain |
| County | Boulder County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1999-12-14 |
| Certificate Issue Date | 2020-09-28 |
| Last Action Date | 2020-09-28 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 52063644 |
| Mode S Code Hex | A867A4 |