|This is the engine which made the Endurance Flight successful.|
Bore and stroke
| 4-stroke cycle diesel
9---static radial configuration
Directly into cylinders at a pressure of 6000 psi
Poppet type, one per cylinder
Compression---glow plugs for starting---air compression 500 psi at 1000 F.
Distillate or "furnace oil"
225 at 1950 rpm
4 13/.16 x 6 in.
16:1---maximum combustion pressure 1500 psi
982 cu in.
510 lb without propeller hub
2.26 lb hp
.46 lb per hp/hr at full speed
.40 lb per hp/hr at cruising
.04 lb per hp/hr
45 11/16 in.
36 3/4 in.
Starter---Eclipse electric inertia; 6 volts. Special series no. 7
Generator---Eclipse type G-1; 6 volts
Instruction Book for the Packard-Diesel Aircraft Engine (Detroit: Packard Motor Car Company, 1931), p. 3.
The specifications from SMITHSONIAN ANNALS OF FLIGHT,
The First Airplane Diesel Engine
Packard Model DR-980 of 1928 - Robert B. Meyer 1964