Navy bi-plane with meteorograph on starboard wing strut Taking meteorological measurements for pressure, temperature, and humidity Manned flights were

Navy bi-plane with meteorograph on starboard wing strut Taking meteorological measurements for pressure, temperature, and humidity Manned flights were inefficient for routine observations as cost high Manned flights grounded during poor weather, thus radiosonde balloons replaced However, such flights paved the way for aircraft weather research projects

Photo Category: Instruments - Aircraft
Photo Location: Washington, D.C.
Photo Date: December 13, 1934