Alliance Aircraft Corp Hess Warrior
The Hess Warior aluminium alloy head is screwed and shrunk into the steel barrel, and bronze inserts and bushings, also shrunk in, take care of all points of wear such as valve seats, valve guides and spark plug bushings.
A two-piece crankshaft with the crank pin integral with the front half is used o transmit the power to the propeller. This construction permits the use of a one piece master rod. The articulating rods are of H section and machined all over.
The shaft is supported by two roller bearings and has a deep groove ball thrust bearing. Steel backed Babbitt bearings are used for the master rod and cam. The valve gear is entirely enclosed. All accessories are grouped at the rear of the engine.
Type: 7 cylinder, air cooled, fixed radial
Rating: 115 hp at 11925 rpm
Displacement: 447 cu.in
Compression ratio: 5.2-1
Bore: 4.25 in
Stroke: 4.5 in
Diameter: 37 in
Weight: 295 lb
Fuel consumption: not more than .58 lb/hp/hr
Oil consumption: not more than .025 lb/hp/hr
Lubrication: Pressure and scavenger pumps
Ignition: 2 Scintilla magneto
Spark plugs: 2 per cylinder B.G.