An air speed indicator is shown in the photograph. The instrument is labeled as a precision tool and is not meant for publication. Notes mention readings such as airspeed values of 60, 150, and 130, with additional markings indicating 140 and 120. Taken in July 1918. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/an-air-speed-indicator-is-shown-in-the-photograph-the-instrument-is-labeled-as-a-precision-tool-and-is-not-meant-for-publication-notes-mention-readings-such-as-airspeed-values-of-60-150-and-130-with-additional-markings-indicating-140-and-120-taken-in-july-1918-image558273743.html
RM2RC7FRY–An air speed indicator is shown in the photograph. The instrument is labeled as a precision tool and is not meant for publication. Notes mention readings such as airspeed values of 60, 150, and 130, with additional markings indicating 140 and 120. Taken in July 1918.
Signal Corps apparatus MER 1562 in use during World War One. The photograph shows the equipment and its corresponding symbol, as well as a note indicating the product description and the fact that it was taken by the RDCD. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/signal-corps-apparatus-mer-1562-in-use-during-world-war-one-the-photograph-shows-the-equipment-and-its-corresponding-symbol-as-well-as-a-note-indicating-the-product-description-and-the-fact-that-it-was-taken-by-the-rdcd-image558213582.html
RM2RC4R3A–Signal Corps apparatus MER 1562 in use during World War One. The photograph shows the equipment and its corresponding symbol, as well as a note indicating the product description and the fact that it was taken by the RDCD.
Caption: A photograph from July 1918 displaying airplane instruments, specifically a Tachometer-Van Sicklen. The image shows a dial indicating 15 RPM (Revolutions Per Minute), along with various numbers and markings. This image is from the collection 'Photographs of American Military Activities during World War One.' Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/caption-a-photograph-from-july-1918-displaying-airplane-instruments-specifically-a-tachometer-van-sicklen-the-image-shows-a-dial-indicating-15-rpm-revolutions-per-minute-along-with-various-numbers-and-markings-this-image-is-from-the-collection-photographs-of-american-military-activities-during-world-war-one-image558265885.html
RM2RC75R9–Caption: A photograph from July 1918 displaying airplane instruments, specifically a Tachometer-Van Sicklen. The image shows a dial indicating 15 RPM (Revolutions Per Minute), along with various numbers and markings. This image is from the collection 'Photographs of American Military Activities during World War One.'
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