Thanks, as you suggested, I have transcribed the data from Table 3.11 (Shot 8, films 28284 and 28282) into a spreadsheet.
I note that the number of data points ( #28284:19, #28282:17) correlates well with the number of smoke rockets used in the test (20). (I could not find any explanation for...
Yes, no argument. Finite differencing is the way to do that.
The problem with the data in table 3.20 and the plot in Fig 3.38 from the TEAPOT report is that it's not the result of finite differencing.
As my spreadsheet demonstrates, it's the plotting of the Moulton-Hanlon equation using...
I remain conflicted on the subject.
On the one hand there is a large body of work supporting nonlinear acoustic theory which demonstrates mathematically the existence of supersonic pressure waves.
But on the other hand there is little experimental evidence for the existence of such waves...
Thank you
The graph is simply the graphical representation of equation 3.4 :
Where I have generated 30 values which I have plotted on the X-axis, from 500 to 3,400 in increments of 100 and evaluated a corresponding value that I have plotted on the Y-axis using the equation ## y = 966.4 * ( 1...
The copy of
5. Moulton and Hanlon, Peak Overpressure va DisUnce in Free-Air. Operation IVY, VT-613, March 1953, 3RD. that I have accessed from https://apps.dtic.mil/sti/citations/AD0363573 is almost unreadable.
This is the derivation of equation 3.4 which is very hard to read:
Does anyone have...
Yes indeed, velocity is very difficult to detect directly. To detect velocity, it is necessary to detect sequential values of position and time, which was specifically the objective of the shock-wave photography that was introduced in Sect 1.1:
It specifically states "detect and locate in...
OK, And at this stage I'm working the numbers with no conclusions.
Looking at test 12, I think table 3.20 and fig 3.38 were calculated, not measured:
I'm still looking for the measured values.
Thanks, but I don't think Dewey's report used the refraction of the light as a measure.
A search for "refraction" only returned one result, in Section 6 p. 377:
"This refraction will give a slight shift to the image of the trail, but calculations based on an assumed density variation behind the...
Smoke mortars were used in nuclear tests to measure the passage of the shock wave. The passage of the shock wave could be detected by the sunlight reflected from the smoke trails being refracted through the shock wave, and high speed cameras were used to record this passage, enabling the...
Apart from the obscure reference in Feynman I quoted in the introduction of this thread, I have been unable to find any physics textbook with any reference at all. Maybe you can oblige with a reference?
No, not at all, but since, by identifying the subject as a "Mainstream Theory", you have unilaterally declared further discussion unacceptable, I will not risk the ire of the Forum by discussing it further.
I am however deeply disappointed that a forum with such lofty ideals such as yours, has...
When I read the Forum Rules, I was encouraged by its Mission Statement and Guidelines, that it would be a forum in which topics could be discussed in a scholarly manner.
I am aware that members have been warned, penalised and even banned from the forum for contravening the "Non-mainstream...