Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N51WS.
| Tail Number / N-Number | N51WS |
| Manufacturer | SULLIVAN WILLIAM L |
| Model | MONERAI-S |
| Year Built | 1981 |
| Manufacturer's Serial Number | WLS-II |
| Aircraft Type | Glider |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | ANDERSON DENNIS W |
| Street | 101 E NORTH POINT DR |
| City | DERBY |
| State | KS |
| Zip Code | 67037 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1981-07-09 |
| Certificate Issue Date | 1984-09-24 |
| Last Action Date | 2006-09-11 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-06-07 |
| Mode S Code | 51460433 |
| Mode S Code Hex | A6611B |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N51WS.
| Tail Number / N-Number | N51WS |
| Manufacturer | BERT-CASSUTT |
| Model | IIM |
| Manufacturer's Serial Number | WLS1 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SULLIVAN WILLIAM L |
| Street | OHIO VALLEY BANK BLDG 140 N MAIN |
| City | HENDERSON |
| State | KY |
| Zip Code | 42420 |
| Region | Central |
| Certificate Issue Date | 1973-09-10 |
| Last Status | Valid Registration |
| Cancellation Date | 1979-06-19 |
| Exported To | UNITED KINGDOM |
| Mode S Code | 51460433 |
| Mode S Code Hex | A6611B |