Cranking my engine while sitting on two 6x6s would mean it took the crank handle with it when it left!!!
ONE revolution would have been the beginning of a terrible wreck.
I'm wondering if mine would break that coffee cup from acceleration or from it falling back to earth.....
I'm CONVINCED the instructions given by Lister for mounting these engines were not to make them 'unhandy to move around'. The one ton of concrete specified and emphatic instructions for stress-free, but absolutely stable mount (shims and grout) was for re-inforcement of the crankcase to make the crankshaft rotate without ANY flex or vibration. When you compare the moving weight of piston and rod and the massive weights swinging on the ends to the relatively light weight crankcase on a narrow footing, it NEEDS something to deaden the bearing wrecking vibration.
I think that goes for the smooth runners as well as the joggers.
I now HAVE a foundation, but primarily because the owners of the property believe as I do....there IS a Lister-driven generator in this property's future for a LONG time to come. It's a sensible and economic solution to a very expensive problem.