| Tail Number / N-Number | N6121U |
| Manufacturer | SWADELL ROBERT A |
| Model | WITTMAN TAILWIND W8L |
| Year Built | 1962 |
| Manufacturer's Serial Number | 205 |
| 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 | LYCOMING |
| Engine Model | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Individual |
| Owner Name | BOATMAN JOHN H JR |
| Street | 112 GLEN ECHO DR |
| City | SMYRNA |
| State | TN |
| Zip Code | 37167-4902 |
| Region | Central |
| County | Rutherford County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2006-05-18 |
| Certificate Issue Date | 2017-08-01 |
| Last Action Date | 2020-03-19 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 51774272 |
| Mode S Code Hex | A7F8BA |