| Answer | Crossword Clue |
|---|---|
| IGOR | Aeronautical pioneer Sikorsky |
| IGOR | Aeronautical engineer Sikorsky |
| LANGLEY | Aeronautical pioneer |
| OTTO | Aeronautical pioneer Lilienthal |
| IGOR | Aviation pioneer Sikorsky |
| IGOR | Aircraft pioneer Sikorsky |
| IGOR | Aeronautics pioneer Sikorsky |
| IGOR | Helicopter pioneer Sikorsky |
| IGOR | Soviet aviation pioneer Sikorsky |
