| Tail Number / N-Number | N51KS |
| Manufacturer | SODERGREN KIT |
| Model | MIDGET MUSTANG |
| Manufacturer's Serial Number | 626 |
| Aircraft Type | Fixed wing single engine |
| 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 | CONT MOTOR |
| Engine Model | C85 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 85 hp (63 kW) |
| Type of Registrant | Individual |
| Owner Name | BOOK PAUL A |
| Street | 1644 RICHVALE HWY |
| City | RICHVALE |
| State | CA |
| Zip Code | 95974 |
| Region | Western-Pacific |
| County | Butte County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1987-03-29 |
| Certificate Issue Date | 2023-01-25 |
| Last Action Date | 2023-01-25 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 51460010 |
| Mode S Code Hex | A66008 |