The take-off distance was measured by tape measure from the point where the wheels started to roll upon application of power to the point along the runway where the wheels left the ground. The early part of the run was made with the nose wheel on the ground, the tail being pulled down at about 100 feet from the starting point.

The maximum ground angle attainable was approximately 13 degrees as limited by the tail skid striking the ground, giving a maximum angle on the channels of 15 degrees for take-off, which is not enough for optimum take-off. Also the elevator control was not sufficient to depress the tail for the full 15 degree angle due to the tendency for the air to pack against the ground under the tail.

The angle of climb was measured by standing at the point of take-off and sighting along a protractor to read the average angle the aircraft maintained above the horizon for approximately its first 1,000 feet of climb. This method is not completely accurate due to small errors in the reading of the angle.

The minimum level of flight speed was checked by flying the aircraft over the runway at about 500 feet altitude and estimating its forward speed from the ground. The speed in relation to the ground was estimated at 15 m.p.h., to which was added the surface wind of 5 m.p.h., plus an allowance of 2 m.p.h. for gradient.

The calculated power-off stall speed of the CCW-5 is 4,250 lbs. weight, if it carried 193 square feet of N.A.C.A. 4418 wing area, would be 76 m.p.h. Thus the effect of the channels is to lower the stalling speed some 54 m.p.h.

At the observed speed of 22 m.p.h. the calculated wing area would be lifting only 351 lbs. at its maximum lift coefficient. Thus the remaining 3,899 lbs (4,250 - 351) was being carried by the channels. We do not know the actual power settings during the observed slow flight, but if the full rated power was being used, the lift from the channels was 8.59 lbs. per h.p. However, we are confident that less than full power was being used at the time.

The attached tabulation gives data on wing and power loadings and on stalling speeds of several currently manufactured aircraft comparable in size and performance to the CCW-5. continue...

(Signed) James G. Ray
Ray & Ray
December 21st, 1955