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The chart below shows the combined results of the first three airspeed measurements taken at AAC, on 3-3-04, 3-11-04, and 7-08-04. The second test was planned as a continuation of the first
test, but the results didn't match the results from the first test. Results from the third test also didn't fit. The difference between the tests is due to differences in the temperature when the measurements were
taken. Each test was at higher temperatures. When the first measurements were taken we had not operated above 600 RPM, 650 at the second test, and 675 at the third test. The first test included recording the data
necessary to determine efficiency, which is listed in the efficiency section. The next two tests did not include all the necessary data to determine efficiency. The third test did not include any power measurements.
On 11-10-04 we have just put up a weather station. We also now have a more accurate readout of RPM. We will soon take new measurements that will include temperature, pressure and humidity, as well as the data
necessary to determine efficiency. They will cover the whole usable RPM range and be taken at different temperatures. For now this is the most complete airspeed data we have. You can see that on a warm summer day we
are achieving 128 MPH at 675 RPM. At this speed a 240 pound person flew well wearing a minimal skydiving outfit. Three different expert fliers have told us that at this speed we are at least as fast as Orlando at
full power while others say we are very close to being as fast. Orlando claims a top airspeed of 150 MPH. Everyone agrees we have much smoother air than Orlando.
You can see from this chart that at 65 degrees F.,
at 675 RPM, we should be achieving at least 135 MPH. At 675 RPM, the fastest we have operated so far, we are only at about 70% power. We do not reach 100% power until 720 RPM, our maximum design speed..
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