| Tail Number / N-Number | N781SF |
| Manufacturer | CHARLES T SMITH |
| Model | TR-4 |
| Year Built | 2019 |
| Manufacturer's Serial Number | 4021 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O-360-A4G |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Kit Manufacturer | TRI-R TECHNOLOGIES |
| Kit Model | TR-4 |
| Type of Registrant | Individual |
| Owner Name | SMITH CHARLES T |
| Street | 796 PRIVATE ROAD 7005 |
| City | EDGEWOOD |
| State | TX |
| Zip Code | 75117-5211 |
| Region | Southwestern |
| County | Van Zandt County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2019-10-06 |
| Certificate Issue Date | 2018-02-08 |
| Last Action Date | 2020-09-12 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 52512723 |
| Mode S Code Hex | AA95D3 |