Pickering, 1907, The vertical screw or helicoptere
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| Original title | The vertical screw or helicoptere |
|---|---|
| Simple title | The vertical screw helicopter |
| Authors | William H. Pickering |
| Date | 1907 |
| Countries | US |
| Languages | en |
| Keywords | Pickering, William H., vertical, screw, helicopter, propeller |
| Journal | Nav. the Air |
| Related to aircraft? | 1 |
| Page count | 5 |
| Word count | |
| Wikidata id |
Sources
- Brockett 1910, page 671, entry 9741: _Pickering, William H. The vertical screw or helicoptere. Nav. the Air, Aero Club of Amer., 1907, New York, pp. 112-116, ill. 2. S (9741
