| Tail Number / N-Number | N504WM |
| Manufacturer | MARTIN WILLIAM S |
| Model | ALLIED T J |
| Year Built | 2014 |
| Manufacturer's Serial Number | 022 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Individual |
| Owner Name | MARTIN WILLIAM S |
| Street | PO BOX 472 |
| City | S COFFEYVILLE |
| State | OK |
| Zip Code | 74072-0472 |
| Region | Southwestern |
| County | Nowata County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2014-08-15 |
| Certificate Issue Date | 2013-12-27 |
| Last Action Date | 2022-11-20 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 51445314 |
| Mode S Code Hex | A64ACC |