C Hetyrehplan Saveleva Public domain photograph of experimental aircraft, prototype, aviation design and development, no copyright restrictions image - Picryl description
Fighter Torpedo Public domain photograph of experimental aircraft, prototype, aviation design and development, no copyright restrictions image - Picryl description
Flying boat, hydroplane VM-2 by Grigorovich Public domain photograph of a bomber aircraft, free to use, no copyright restrictions image - Picryl description
Engels-II hydroplane, flying boat Public domain photograph of a bomber aircraft, free to use, no copyright restrictions image - Picryl description