OY-21
| Type | D.S.U. Skoleglider |
| Construction number | |
| Year of manufacture | 1938 |
| Year of registration- cancellation | 1938-1944 |
| ICAO | 0 |
| Notes | RS-1 (Ringsted Svæveflyveklub), OY-21, crashed 8.4.1944 Billesborg, Køge |
| Type | D.S.U. Skoleglider |
| Construction number | |
| Year of manufacture | 1938 |
| Year of registration- cancellation | 1938-1944 |
| ICAO | 0 |
| Notes | RS-1 (Ringsted Svæveflyveklub), OY-21, crashed 8.4.1944 Billesborg, Køge |