The Wall of Integrity by tallpindo

Writers • Aviation • posted on Jul 19, 2017

Open full image in new tab Zoom on image

Hover over top left image to zoom.
Click anywhere to exit.

Members remain the original copyright holder in all their materials here at Renderosity. Use of any of their material inconsistent with the terms and conditions set forth is prohibited and is considered an infringement of the copyrights of the respective holders unless specially stated otherwise.

Description

Easy to push through in the minds of anyone wanting to see the most desperate lacks shown to be wisps of conservatism. I now have two concepts I have put on hold waiting for more description in digital terms. The first was what I called “Torque Stagger.” This is now just a mode of All Wheel Drive (AWD). It is when the slope of even step in mud, rock, or terrain in front of one wheel is traded off with the great traction at one or all the other wheels. The simplest is when the front wheels are trenching in mud and steering is being slammed by variations in stiffness or rocks in the gumbo and one wheel in the back is on solid ground or pavement. Forget that for now. I made it up to explain what happens when a single tire suddenly goes flat at high speed. The matter we are confronting now is my (Tallpindo’s) unwillingness to make models of supercharger vanes or impeller blades and more specifically gas turbine blade and vane models. Perhaps sheet metal fenders share some of the same needs but they typically are not described by equations but are more free form until tested in a wind tunnel. The difficulty I am shrinking from is synchronizing the polygonic description of the front and back of the airfoils. Now with these airfoils highly twisted the descriptions are more difficult than ever. So many times, I have made one side of a curved surface and then at some tapered or thinness the other side pokes through. The easily solved places where I have met this are on soles of women’s shoes. Making iron or aluminum castings which represent engine blocks or heads seemed to be a place where hand work could dismiss this difficulty because the surfaces were mostly freeform with well positioned in an xyz coordinate system milled or bored machined surfaces to locate boundaries. The image I have chosen is something sitting beside an A-6E aircraft so I have interpreted it to be a J-52-P408 jet engine. This engine was also used in the Skyhawk in its later years. I have seen and followed through a night on a test stand an endurance test of the P6 trainer version of this engine. The feature of the P408 that could be looked for is variable inlet guide vanes, like a J-79. That is not what I want to present. Look at all the compressor blades in rows on the left thin like potato chips as they fan radially around the disks. The rows shrink in overall diameter until they blow into the combustor which in the image is cutaway to show the perforated liner and flame holding characteristic. If I find the airfoil description (which is not as openly published as wings for airplanes) and use enough points to obtain a useable, even for just visual identification, then I must maintain that description as it shrinks to scale, toward the root of the blade. Working with wings, I have tended to run into the surface as I zoom. Instead of increasing detail as I approach the leading edge or trailing edge I see open space. Now picture me twisting the airfoil description to get a 3-dimensional blade formula other than a prism. I so far have shied even from an 1880’s steam locomotive head light generator turbine. My past creates a tendril of proprietary censorship due to the rare optimums in successful jet engines so far in being. So, unlike the other photographs I have shown here I have not previously put up renders made from memory models or even culled from shared public photographs or drawings.