| Tail Number / N-Number | N501WM |
| Manufacturer | MARTIN WILLIAM S |
| Model | BD5B |
| Year Built | 1974 |
| Manufacturer's Serial Number | 1738 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | HIRTH |
| Engine Model | F20 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 23 hp (17 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 | 1996-07-09 |
| Certificate Issue Date | 1996-03-05 |
| Last Action Date | 2022-11-20 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 51437647 |
| Mode S Code Hex | A63FA7 |