posted 12 years ago
Vibration is an issue, but so is chassis flex (not sure how much that happens in buses, it does happen in trucks). How were you thinking of attaching the RMH?
I'm not sure earthquakes are a good comparison. It's the continual vibration over time that is the issue - imagine driving for 5 hours, and then how many times that happens in a year. You could test this - make up something from cob, secure it to the floor, and take it for a drive.
Weight might be an issue too, depending on what materials and design you use.