Motive Power of Van Anden.
A 50-horsepower "H-F" water cooled motor drives a
laminated wood propeller 6 feet in diameter, with a 17
degree pitch at the extremities, increasing toward the
hub. The rear end of the motor is about 6 inches back
from the rear transverse beam and the engine shaft is
in a direct line with the axes of the two horizontal rudders.
An R. I. V. ball bearing carries the shaft at this
point. Flying, the motor turns at about 800 revolutions
per minute, delivering 180 pounds pull. A test of the
motor running at 1,200 showed a pull of 250 pounds on
the scales.
