At the point of toppling the CoM is vertically above the downside wheel. If you estimate the relative mass of the engine and superstructure you can make a guess at how far above.AVGresponding wrote: ↑Sat Jan 03, 2026 1:13 amYeah it's quite visually disturbing to see, and somewhat counter-intuitive. It would be instructive to see where the actual centre of mass is.Zenith wrote: ↑Fri Jan 02, 2026 11:48 amThen maybe the slope was tilted at 28 degrees necessary for the test, but the bus was just on the verge of toppling and was at 35 degrees because the suspension was compressed as you suggested. Very impressive anyway.AVGresponding wrote: ↑Fri Jan 02, 2026 9:50 am You'd expect the angle on the bus to be larger in any case, due to compression of the suspension on the loaded side
Interesting findings on the internet
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Re: Interesting findings on the internet
Re: Interesting findings on the internet
The bus will be roughly symmetrical viewed end on. If you imagine the bus tilted in the other direction the CoM will be directly above the driver side wheel at the point of toppling. The point where the perpendiculars from the two wheels cross, I estimate to be slightly above the radiator cap. The CoM of the bus would be on that axis. That seems reasonable as a lot of the mass of the bus would be engine, chassis, transmission, wheels and seats below that point.
Re: Interesting findings on the internet
Irritating: I should have thought of that!Zenith wrote: ↑Sat Jan 03, 2026 10:03 am The bus will be roughly symmetrical viewed end on. If you imagine the bus tilted in the other direction the CoM will be directly above the driver side wheel at the point of toppling. The point where the perpendiculars from the two wheels cross, I estimate to be slightly above the radiator cap. The CoM of the bus would be on that axis. That seems reasonable as a lot of the mass of the bus would be engine, chassis, transmission, wheels and seats below that point.
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AVGresponding
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Re: Interesting findings on the internet
More modern buses will have an even lower centre of mass. The engine and gearbox package in particular is normally mounted very low down in the rear nowadays.
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