In a previous project (https://forum.freecadweb.org/viewtopic. ... 04#p217871) I used a master sketch to link all the reciprocating components. In this much simpler project I wanted to explore any advantages of using chained body shapebinders to link the reciprocating components rather than a master sketch. Body shapebinders provide more 3D context when creating the model IMHO.
This model was created from public domain drawings of a 2009 design copyrighted by G.A. Graham called the 'Lobo Pup Twin'. Several screenshots of the the work process are included with a few comments:
I do prefer using chained linked body shapebinders rather than linking back to a single master sketch but have yet to fully understand if the model is as stable. One disadvantage is that if any of the shapebinders features are changed then it is likely that any dependent body will blow-up. I plan to investigate the master sketch approach once again with a more complex beam engine model currently in process.
The 7.6 Mb file is too large to attach but I can put it on Dropbox if anyone is interested in the details.
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13509 (Git)
Build type: Release
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)