Can anyone out there direct me to a standard or guide regarding preferred methods for testing pressure vessels? (AIAA, AMSE, NIST, Whatever Association of Pipe-Fitters and Pressure Vessel Experts, etc.) I've read plenty of anecdotal evidence, and intuitively understand how a vacuum test should...
I am trying to set up a vacuum leak test. I want to apply a vacuum to an assembled panel we produce(~1'x1'x1.5" thick, very little internal space, basically just the space between internal components and outer bezel), then lock the vacuum and measure decay over time. I am thinking ~15-30 mm HG...
Hey everyone, I’m trying to figure out what wind tunnel is featured in the recent iPhone 11 commercials. Any thoughts? It’s obviously a low speed, likely research-based facility. Really not sure if it’s a private or government facility.
What do you guys think? :)
I have two (2) sets of drag coefficients, purportedly for the same thing. These drag coefficients are used in separate aero models. I know a lot about one aero model, and very little about the other. One thing that stands out to me is that one model uses a constant gravity model, whereas the...
Hey All,
So here's my problem: I need to read binary data over a closed wireless network into LabVIEW. I know (or will know) the IP address/Port # for where the data is coming from. This will be live, streaming binary data that I will then have to convert into an array or matrix or whatnot, in...
Hello All,
I what what I thought (once again!) was a fairly straight-forward problem to solve, but I can't quite seem to get there. I have 4 eqns, 4 unknowns. Equations are along the lines of:
sqrt(x^2+y^2) + z + sqrt((val1-x)^2 + (y-val2)) + Const1 = 0
sqrt(x^2+y^2) + z + Const2 = 0...
Hopefully this one is easy. I think this should be a no-brainer, but I haven't used LV extensively in quite a while... :P
I have a text file I want to read in to labview (I'm good there); but I want to read it in at, say, 200Hz, as if to simulate a real-time data stream. I'll be using my VI for...
Hey Y'all,
I'm a bit rusty, and could use some help in solving a system of equations. Let's say I have 2 equations, 2 unknowns (simplified for discussion's sake), and one of my equations looks something like:
B1 = (const1)x1 + (const2)x2^2 + sqrt(x1-x2).
Assuming I can't come up with a third...
I'm working on a project where I'm programming an ARM microchip that acts as the "brains" on a custom board with other off-the-shelf components. In programming the ARM chip, you can program the other hardware components. Since I'm not overly experienced as a programmer, and not very familiar...
Does anyone know where/how to access the Matlab Toolbox directory in Mac OS X? On a Windows machine (Win XP), its fairly straightforward: C:\Program Files\MATLAB\R2007a\toolbox.
On OS X, I can't seem to find any such directory, even though I have a half-dozen toolboxes installed. I can't even...
I'm trying to develop a table for Index of Refraction for standard atmosphere. So far I've found reference to the Ciddor and Edlen equations, but I'm having trouble finding the exact calculations and what goes into them. Also, some of the references I've found mention of using the Ciddor...
***Apologies up front for the long, general nature of this post...***
I'm trying to solve an aero problem by converting drag data (Cd at given Mach #s) from a given source to a smaller scale. Somewhat specifically, I'm trying to transpose Cd data for a given rocket body to a smaller cylindrical...
Really simple question...
What's the trick to adding a legend to a matlab plot? I'm a pretty experienced Matlab user, just shaking the rust off after a couple years of little use. To cite the example in a Matlab manual (version 7, from early 2009 I think):
>> x = 0:pi/200:2*pi;
>> y = sin(x)...
I'm trying to create a square wave that accounts for the Gibbs phenomenon (the overshoot that occurs when a square wave changes direction). Specifically, I want to add overshoot at just the leading edge of a rise or fall.
Square waves are easy - manually or via function 'square'. I can also do...
I'm looking for data/info on the trajectory of spent shells/casings after firing a bullet. Drag coefficients/ factors, trajectory data, etc.
Any help is appreciated!
Keywords: bullet round shell case cartridge drag factor coefficient
