| Tail Number / N-Number | N444DD |
| Manufacturer | DERBY DONALD F |
| Model | THORP T-18 |
| Manufacturer's Serial Number | 1423 |
| 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 | Co-Ownership |
| Owner Name | HARDIN DONALD D TRUSTEE |
| Other Names |
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| Street | 1315 S GEYER RD |
| City | KIRKWOOD |
| State | MO |
| Zip Code | 63122-7111 |
| Region | Central |
| County | St. Louis city |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1984-03-26 |
| Certificate Issue Date | 2021-04-26 |
| Last Action Date | 2021-04-26 |
| Expiration Date | 2028-04-30 |
| Status | Valid Registration |
| Mode S Code | 51254710 |
| Mode S Code Hex | A559C8 |