W42Auth\MC-CHF41.DOC

Chanute Field 1939-1941

Chanute Field IL 1939-1940

Hamilton Hydromatic Piston Dome, piston rotated the bevel gear which rotated the prop blades

New Auto Control Hamilton Hydromatic Prop – engine oil moved piston in dome

New Hamilton Hydromatic B-17 propeller flat on left; Curtis Electric P-40 prop hanging center

They used solid aluminum blades

Wright 1820cuin (R-9) B-10, B17, B18 engines left; Allison 1710cuin (V-12) P-38, P39, P40 Engines right

Engine test Block

Light friend of Marvel, holding rider right,

would be flown from Clark to Mindanao to do sheet metal work, then to Java and Australia

Observation plane with two pitch prop

near by University of Illinois

Army “PBY”

B-10s had been in service since 1935

This B-10 used the same engine as the B-17