November 17, 2020 10:32AM
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Registered: 4 years ago
Posts: 170
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Hi Kanga,
Quote
On the contrary. Their wording indicates that this is the average or mean slope for the entire QCN shaft.
Gantenbrink writes about QCN: «
Based on 14 measurements made over a distance of 17 meters, the shaft's angle of ascent fluctuates between 33.3° and 40.1°. Block No. 4 clearly shows that a change in the angle was made at this point.»
You assume that «
"Fluctuates" is an unfortunate choice of words. What he should have said was, "the angle changes, from 33.3 degs to 40.1 degs."» and I agree with your interpretation, since «
Block No. 4 clearly shows that a change in the angle was made at this point.», that is, we are talking about a one-time change. This means that before Block 4, the shaft angle is 33.3°, and after 40.1°.
Unfortunately, I cannot open Gantenbrink's cyberdrawings, so the exact values are not available to me, but the length of the shaft from the outlet to Block 4 can be approximately estimated at 5-6m. That is, in comparison with the known shaft length of 63m, the initial 5-6 m with a slope of 33.3° make up a small part of it, and therefore it is incorrect to calculate the average value for the whole shaft by simply averaging two values.
Gantenbrink gives an average angle of QCN of 39° 7' 28" (MDAIK 50), which is significantly higher than Djedi's average angle (36.7°), because, unlike them, he understands what he is calculating.
Alex.
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