| Tail Number / N-Number | N125WD |
| Manufacturer | QUAD CITY ULTRALIGHT |
| Model | CHALLENGER II |
| Year Built | 2007 |
| Manufacturer's Serial Number | CH2-0899-1896 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | WHITLEY WILLIAM E |
| Street | 294 SW COUNTY ROAD 18 |
| City | HIGH SPRINGS |
| State | FL |
| Zip Code | 32643-1105 |
| Region | Southern |
| County | Alachua County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-11-13 |
| Certificate Issue Date | 2014-02-04 |
| Last Action Date | 2022-11-06 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration |
| Mode S Code | 50064075 |
| Mode S Code Hex | A0683D |