Packard Radial Diesel
Aircraft Engine - DR 980
circa - 1928
Type - 4-stroke cycle diesel
Cylinders - 9-static radial configuration
Cooling - Air
Fuel injection - Directly into cylinders at a pressure of 6000 psi
Valves - Poppet type, one per cylinder
Ignition - Compression-glow plugs for starting -air compression 500 psi
at 1000 F.
Fuel - Distillate or "furnace oil"
Horsepower - 225 at 1950 rpm
Bore and stroke - 4 13/.16 x 6 in.
Compression ratio - 16:1---maximum combustion pressure 1500 psi
Displacement - 982 cu in.
Weight - 510 lb without propeller hub
Weight-horsepower ratio - 2.26 lb hp
Where manufactured - U.S.A.
Fuel consumption - .46 lb per hp/hr at full speed
Fuel consumption - .40 lb per hp/hr at cruising
Oil consumption - .04 lb per hp/hr
Outside diameter - 45 - 11/16 in. Overall length - 36 - 3/4 in.
Optional accessories - Starter---Eclipse electric inertia; 6 volt
Generator -Eclipse type G-1; 6 volts. Special Series no. 7
The specifications from SMITHSONIAN ANNALS OF FLIGHT,
The First Airplane Diesel Engine Packard Model DR-980 of 1928
Robert B. Meyer 1964
