Originally Posted by SpaceNorman
For the sake of discussion - let's take the OP's assessment of air suspensions vs mechanical spring suspensions at face value.
Let's temper it with an observation that air suspensions don't start showing up standard equipment until you're talking about large diesel pushers.
Now let's ask one question: Who buys a diesel pusher to drive on wash boarded dirt roads? Aside from the occasional (and relatively short!) stretch of dirt road that must be traveled in order to get from paved roads to campgrounds and back - most of the DP owners I know avoid dirt roads like the plague.
Even if the OP's assessment of air suspensions are completely accurate ... does it really come into play given the typical use profile that most DP owners fit?
that has always been anolagee...DP's drive great on smooth roads...and the great thing they have going is the isolation that they have from road vibrations..
dp's ride horrible on ruff roads and continued use that way will cause major damage.... dp's have very minimal wheel travel and don't have the shocks needed to control rebound,,,,
like I said the farther t you travel down a bad road the worse it gets and the more harm it is doing... the only choice you have is to reduce speed to a crawl...
I don't know if any of you have drove down cane beds road in Utah . it's a short cut to get from hurricane Utah to pink coral sand dunes..
we used to always go that way because it cuts off about 50miles... the road is about 8 miles of county maintained wash board road...
I used to be able to go down the road 25-30 mph in my ol southwind with the p30 chassis ... never once thought it was doing damage...other than the dust if the road wasn't watered down...
but totally un driveable in my ford or my DP...in fact... 5mph felt like we weren't gonna make it... now I go through Kanab...50 moles farther .. but get there in the same time...
so I amagine most every where you go there is a long way around, that has a smooth road
there is a coach builder that says... Roughing it smoothly.... which I have come understand it meaning as stay on the smooth roads