Peter Dow
@peter-dow-2pfGj0 Member
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Replied #Threads
Analysis of Florida International University pedestrian bridge collapse
Now considering member 2, which survived intact, member 2's "SECTION C-C" - - has 12 x size 8 (diameter 1", area 0.785 sq-in) reinforcing bars and...
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Analysis of Florida International University pedestrian bridge collapse
As I have noted in the next image, W Denney Pate's drawings don't draw a section through member 11 with only 2 P.T. bars, only section...
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Analysis of Florida International University pedestrian bridge collapse
<a href="https://en.wikipedia.org/wiki/Florida_International_University_pedestrian_bridge_collapse" target="_blank" rel="nofollow noopener noreferrer">Florida International Univers...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
BEWARE BAD LINKS ABOVE! I lost my website hosting in January. I was not "hacked" but the gcehosting administrator seems to have gone out of business...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
#-Link-Snipped-# My trispokedovetile CAD-CAM webpage now offers an (X,Y,Z) option for router cutting using rotary tool paths between spaced out tiles - I've simulated the CNC...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
HOLES! Now #-Link-Snipped-#
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
For Computer-Aided Manufacturing of trispokedovetiles, I'm publishing today my new Javascript web-page - #-Link-Snipped-# - which generates Computer Numerical Control (CNC) code...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
Now to consider the important issue of interlocking trispokedovetiles against movement in the direction normal to the tiled plane, which for the application of tiled armour...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
Tutorial on how to produce 3D images from #-Link-Snipped-# Step 1. Create a line image using my webpage, this is for CIRCLE = 120. Right click...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
A.V.Ramani<a href="https://www.shutterstock.com/search/tetrapod?image_type=vector" target="_blank" rel="nofollow noopener noreferrer">196 Tetrapod Stock Vectors, Images & Vector Ar...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
A.V.Ramani<a href="https://www.shutterstock.com/search/tetrapod?image_type=vector" target="_blank" rel="nofollow noopener noreferrer">196 Tetrapod Stock Vectors, Images & Vector Ar...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
Peter DowThe only people "trying" here would appear to be the company Mozilla who are trying to offer a browser called "Firefox" which is trying to...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
[Prototype]Interesting.Thanks. [Prototype]What exactly is the above animation trying to illustrate?What part of - Peter Dow#-Link-Snipped-# I've programmed a webpage using Javascri...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
[Prototype]I've absolute zero knowledge about mechanical engineering so it might be a dumb question, but can you tell what exactly is the significance of this? I...
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Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
#-Link-Snipped-# I've programmed a webpage using Javascript to display an animation which shows a range of different trispokedovetiles, each of which can be specified by a...
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Posted #Threads
Geometry. Three-spoke dovetailing tile tessellation. "Trispokedovetile"?
I've posted this image which I've described as a "Three-spoke dovetailing tile tessellation". #-Link-Snipped-# by <a href="https://www.flickr.com/photos/peterdow/" target="_blank"...
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Mathematics of the Wankel Engine shapes
I also use Wolfram Alfa quite a bit for routine calculations. Their search engine is also amazing.Well the Wolfram Mathematica package looks even more amazing but...
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Mathematics of the Wankel Engine shapes
Regarding the mathematics of the unusual shape and profile of the Wankel engine triangular rotor and combustion chamber housing, I'm reviewing a mathematics demonstration I have...
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Posted #Threads
FREEZERBATON - Freezer-baton for basic cryosurgery on a budget!
I'm describing here my design and construction project of a simple tool for basic cryosurgery - limited to freezing superficial skin lesions such as verrucas and...
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Tessellated I - my simple technical drawing, coloured artfully
<a href="https://www.youtube.com/watch?v=CRV9iuX8vSs" target="_blank" rel="nofollow noopener noreferrer">HI-BRICKS & DOWELS demonstration video by Peter Dow - YouTube</a> Transcr...
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Tessellated I - my simple technical drawing, coloured artfully
bioramaniSince they dovetail or interlock to form structures an obvious name can be Dowtail.Well the pins and tails of a "dovetail" joint are trapezoidal in shape,...
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Tessellated I - my simple technical drawing, coloured artfully
Someone on another forum produced an image - which I have uploaded here - "tiles cracked.jpg" which shows how the simple 2-D shape can be pulled...
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Tessellated I - my simple technical drawing, coloured artfully
bioramaniI was considering the pattern of the interlocked tiles that you mentioned;So was I. I was just pointing out that the interlocking of simple tessellated I-tiles...
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Tessellated I - my simple technical drawing, coloured artfully
bioramaniThis structure will have some flexibility in two dimensions. The interlocking 'I's will give excellent tensile strength.Of course a real structure always has 3 dimensions...
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Tessellated I - my simple technical drawing, coloured artfully
Now this is all my own creation, also produced using Paint.NET. Tessellated I in Steel #-Link-Snipped-# Now it's time to think about possible engineering applications.
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Tessellated I - my simple technical drawing, coloured artfully
bioramaniBeautiful work, Peter. Very satisfying and dynamic. Thanks for putting up.Thanks Bioramani but I'm responsible only for the precise detail of my "Tessellated I" than the.....
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Posted #Threads
Tessellated I - my simple technical drawing, coloured artfully
#-Link-Snipped-# A tessellation of a capital "I" shape employing the colours of the spectrum which I created using <a href="https://www.getpaint.net/" target="_blank" rel="nofollo...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
prashpanI too believe that the reservoir that large can trigger a small earthquake, but we will have to do additional work on reservoir floor and make...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
bioramaniIn 1958, I visited the Caltex refinery in Vizag, India, as part of the curriculum. They were making a shallow reservoir (about two acres) for process...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
My second take is to use drain-pipes through the base of the dam which now extends all the way down to the bed rock with the...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
prashpanThank you Peter you have been most informative.Thanks. prashpanAbout the Coire Glas Project, at 317 meter height it would become the highest dam and would create...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
prashpanWell yes those were examples, as there are infinite number of formations possible. And we had assumed many simplifications like height and flat ground and all.For...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
prashpanFascinating Derivation...👍Thanks. Just to be clear, what I headed as "Derivation" was deriving this mathematical relationship - "The power and energy of a wind farm is.....
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
double post
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
bioramaniWould this initiative help? #-Link-Snipped-#I am not so crazy and apolitical as to trust any one of the Queen's ministers of Scotland to help, ever. I...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
No takers for the derivation challenge huh? OK then. Derivation Assume various simplifications like all turbine rotors are the same size and height, flat ground and...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
"Dow" equation for the power and energy output of a wind farm. "The power and energy of a wind farm is proportional to (the square root...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
AbraKaDabra#-Link-Snipped-# We have featured your thread on CrazyEngineers Fan Page on Facebook. 👍Thanks. Dancer_EngineerInteresting information #-Link-Snipped-#. 👍Thanks. Da...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
Dam foundations and height of the dam above the bedrock The top of the Dow-Dam has an elevation of 780 metres by design. #-Link-Snipped-# #-Link-Snipped-# The...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
Geology of the Coire Glas site I have been able to extract this information from the #-Link-Snipped-# from the 1:50 000 scale map. #-Link-Snipped-# #-Link-Snipped-# Accordin...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
Loch Lochy and vicinity water flow control works Here is an annotated satellite photograph of the land south from Coire Glas showing Loch Lochy, Loch Arkaig,...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
Enhanced satellite photograph #-Link-Snipped-# #-Link-Snipped-# Cross section of the Dow-dam The Dow-dam would be more than 3 times higher than the proposed SSE-dam. In th...
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
Cross section of the Dow-dam reservoir Cross section along the major diameter of the elliptical excavation of the reservoir bed #-Link-Snipped-# #-Link-Snipped-#
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Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
bioramaniThat is certainly thinking BIG! Nothing skimpy about your scheme. Very interesting. Been to Aberdeen once in 1992 and thrice to Scotland in the 90s. Aberdeen...
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Posted #Threads
Large Scottish Pumped Storage Hydroelectric Reservoir and Dam (@ Coire Glas)
I am presenting here my vision for a large pumped storage hydroelectric 2-square kilometres surface-area reservoir and 300+ metre tall dam which I have designed for...
29 replies
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