rctoyguy wrote:
'm thinking we are going to want something in the under 30' range, and I've noticed they all appear to have a crazy long rear overhang (from rear wheels to rear bumper). I'd think too much would cause too many dragging issues - is there a rule of thumb to go by for what is too much? I've also noticed some are "beveled" at the very rear bottom which I'd think would help.
The beveling of the rear overhang's walls of course helps those coach walls from scraping and getting damaged. On our small Class C (only 24 feet) this beveling of the rear overhang's coach walls actually starts immediately at the rear duals' wheelwells - with no horizontal portion of the coach walls at all aft of the rear duals.
Actually there is a fairly straight-forward and not too expensive way to lift the rear of long Class C motorhomes only when you need/want to lift the rear. Have air bags installed even if the rear end already sits pretty level or even slants slightly up. Get them installed with the dash inflation control mounted right on the bottom of the driver's side dash. Set the control so that minimum air is in the bags most of the time. When you want to lift the rear a little temporarily for more rear end clearance, just hit the control and inflate the air bags a bit. Lower the rear end back to normal afterwards.
As a bonus, you can also use air bags installed the above way to help with leveling at campgrounds. Of course if the rear end eventually sags permanently due to rear spring fatigue, you can run with the air bags constantly inflated just enough to keep the rear end level.