Originally Posted by Handyman
I do remember those 70's models Airstreams with the tank in the rear. LOT's of bent frames. I owned an 89 Airstream and they had gotten smarter and put them back near the axels. Airstream couldn't put them directly over the axels because of the torsion bar suspensions.
Well it must be a bitch to determine tongue weight with all that variable weight at the ends of the fulcrum.
That wasn't the only problem with the frames. The 70's vintage Airstreams had notoriously weak frames. That had been pretty well cured by the 1980's. My 1981 still had the tanks at the rear, but the frames had been beefed up and the grey tank increased to a more reasonable 20 gallons.
My current RV has the holding tanks between the axles (pretty easy on a moho), however the fresh water tank is behind the axle.
We seldom travel with more than 15 gallons or so and it doesn't make a noticable difference on something that ways in at nearly 13k#.
Remember Dutchmen doesn't use engineers, just sales people and assemblers.