| Tail Number / N-Number | N81259 |
| Manufacturer | BARRON GLENN |
| Model | VANS RV-4 |
| Manufacturer's Serial Number | 2034 |
| 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 | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | THERMODYNAMIC SCIENCES LLC |
| Street | 13061 HOLLY COURT |
| City | GRAND BAY |
| State | AL |
| Zip Code | 36541 |
| Region | Southern |
| County | Mobile County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1990-11-15 |
| Certificate Issue Date | 2021-09-20 |
| Last Action Date | 2021-09-20 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 52611763 |
| Mode S Code Hex | AB13F3 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N81259.
| Tail Number / N-Number | N81259 |
| Manufacturer | FAIRCHILD |
| Model | 24W-46 |
| Manufacturer's Serial Number | W46159 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 102 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | FAIRCHILD PERSONAL PLANES |
| Street | BOX 5610 |
| City | DALLAS |
| State | TX |
| Zip Code | 75001 |
| Region | Southwestern |
| County | Mobile County |
| Certificate Issue Date | 1946-06-22 |
| Last Status | Valid Registration |
| Cancellation Date | 1947-09-11 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N81259.
| Tail Number / N-Number | N81259 |
| Manufacturer | GRUMMAN AMERICAN AVN. CORP. |
| Model | AA-5B |
| Manufacturer's Serial Number | AA5B0477 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 105 miles per hour |
| County | Mobile County |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |