| Tail Number / N-Number | N121TT |
| Manufacturer | BOLKOW |
| Model | PHOEBUS C |
| Year Built | 1968 |
| Manufacturer's Serial Number | 819 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Average Cruising Speed | 60 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MAHONY JOHN P |
| Street | 2009 BARRETT RD |
| City | BALLSTON SPA |
| State | NY |
| Zip Code | 12020-2816 |
| Region | Eastern |
| County | Saratoga County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1978-04-04 |
| Certificate Issue Date | 2020-06-29 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 50054444 |
| Mode S Code Hex | A05924 |