| Answer | Crossword Clue |
|---|---|
| OGEE | .. delta (Concorde wing shape) |
| AILE | Concorde wing |
| SST | Delta wing craft |
| SST | Plane that had a delta wing |
| rogallo | a flexible fabric delta wing, originally designed as a possible satellite retrieval vehicle but actually developed in the 1960s as the first successful hang-glider |
