Ryan NYP Fuel Efficiency Curves: Miles Per Pound Gas vs. Air Speed (Sheet 6) (1927)

Technical graph sheet 6 plotting miles per pound of gas against air speed across multiple weights. — Ryan NYP Fuel Efficiency Curves: Miles Per Pound Gas vs. Air Speed (Sheet 6) (1927) · Donald A. Hall Estate Collection

A primary mathematical graph from Donald A. Hall's design portfolio plotting fuel mileage efficiency (miles per pound of gasoline) against indicated airspeed. Plotted for full load, intermediate loads, and light load, the parabolic curves identify the specific optimum cruising velocity required to extract maximum nautical miles per pound of fuel consumed throughout the transatlantic flight.