| Tail Number / N-Number | N121WT |
| Manufacturer | SCHLEICHER |
| Model | ASK-21 |
| Year Built | 1991 |
| Manufacturer's Serial Number | 21524 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 0 engines |
| Type of Registrant | Co-Ownership |
| Owner Name | HELMICK HUGH M |
| Other Names |
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| Street | 704 W GRAAF AVE |
| City | RIDGECREST |
| State | CA |
| Zip Code | 93555-2413 |
| Region | Western-Pacific |
| County | Kern County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1992-05-01 |
| Certificate Issue Date | 2005-03-30 |
| Last Action Date | 2022-10-18 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 50054557 |
| Mode S Code Hex | A0596F |