RogCAD Virtual Girder and Panel Building Set

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DOWNLOAD: RogCAD Girder and Panel Building Set  2.06 MB          
                                                                           Animation1: Click here
             1957 - 1962  construction toy
                                                                           Animation2: Click here
                                                                           Quick Start Guide

The physical toy Girder and Panel represented in RogCAD Girder and Panel was 
manufactured by Kenner, a trademark of Hasbro, with which RogCAD is not affiliated.

The current manufacturer of the physical toy Girder and Panel 
is Bridge Street Toys, with which RogCAD is not affiliated.

A comprehensive and well illustrated guide to the histoy of all
Girder and Panel building sets can be found at:  Girder & Panel and Bridge & Turnpike Heaven

Also see: RogCAD 3D CAD
Keyboard entry 3D CAD software for DOS and Windows

end girder and panel page         site map

Special Relativity explained in absolute terms -

eliminates the twin paradox, shows Einstein's clock sychronization
diagrammed in absolute terms, and ends all confusion regarding
relative frames of reference.  Completely compatible with, and in
fact subsumes, Einstein's relativity.  Not Lorentzian relativity.
Reveals what is transpiring behind the scenes of Einstein's


Relativity in Absolute Terms.
My most comprehensive online document.  A concise overview
of why special relativity must be diagrammed in absolute terms.

Twin Paradox Animation on YouTube.
More concise text than found in the document below.

Twin Paradox Animation.
Expanded text, and animation of the twin paradox.  (Embedded YouTube animation.)

Twin Paradox Explained.
A similar discussion of the failure of spacetime diagrams.  

Twin Paradox Animation.
Alternative text, and animation of the twin paradox.  (Embedded YouTube animation.) 

Absolute Frame of Reference
Absolute frame of reference in the physics community.

Free pdf file of the book:

Relativity Trail, free pdf format, with 192 pages, 65 diagrams 
and 75 illustrations, will provide you with complete detailed 
algebraic derivations of all the kinematical effects of special 
relativity.  Everything is charted out in absolute terms against 
a system at rest with respect to the totality of the universe 
for perfect clarity as well as soundness of theoretical basis.  
It is the totality of the universe that imparts the inertial 
properties of clock rates and lengths which generate the effects 
of relativity.  This is explained in detail in Relativity Trail.

Excerpts from the book Relativity Trail with included images.

Einstein explained in excerpts from Relativity Trail.

Diagrams and derivations from the book Relativity Trail.


Chaos etc - equations and graphical output.
Eight equations generating exotic behavior,
along with the program code and graphical output.

RogCAD - 3D CAD software for Windows and DOS

featuring keyboard entry of points, lines, planes, cubic
elements and curved elements.  Your design elements are
guaranteed to fit together seamlessly.  Text file data
allows for easy and robust editing of design elements.
There is automatic surface modeling with light source
direction, and an advanced customizable color palette.


His story and music videos

The Hermit Thrush
Streaming three minute audio of the Hermit Thrush

Uncle Remus illustrations by A. B. Frost
with a note from author Joel Chandler Harris


Vintage American Locks
Vintage and modern day padlocks from
John Junkunc's beloved American Lock Company


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