Category:Sikorsky S-21

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English: Sikorsky S-21
Sikorsky Russky Vityaz 
Sikorsky Russky Vityaz (Le Grand).jpg
Wikipedia-logo-v2.svg  Wikipedia
Subclass of biplane
First flight
  • 26 May 1913
Service entry
  • 1913
Total produced
  • 1
Authority control
Blue pencil.svg

Pages in category "Sikorsky S-21"

This category contains only the following page.

Media in category "Sikorsky S-21"

The following 7 files are in this category, out of 7 total.