| Tail Number / N-Number | N278WW |
| Manufacturer | BEECH |
| Model | D17S |
| Year Built | 1939 |
| Manufacturer's Serial Number | 264 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | R-985 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 450 hp (336 kW) |
| Average Cruising Speed | 158 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | WEDELL WILLIAMS MEMORIAL FOUNDATIONS |
| Street | PO BOX 38 |
| City | PATTERSON |
| State | LA |
| Zip Code | 70392-0038 |
| Region | Southwestern |
| County | St. Mary Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-06-21 |
| Certificate Issue Date | 1980-01-03 |
| Last Action Date | 2022-02-16 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 50543075 |
| Mode S Code Hex | A2C63D |