Forum Discussion
j-d
Dec 10, 2013Explorer II
That Floorplan>>Drives>>Wheelbase is something I summarized from observations I've made and comments by others that I've read. The Rear Bed/Walkaround Queen requires a certain number of inches. The Bathroom requires a certain number of inches and they want the Shower Pan over one Wheel Well (hence the Skylight/Dome on the Roof!). The side opposite the Shower Pan gets Fridge, Furnace or Water Heater. Something that doesn't have to reach the floor. So that's a predetermined Rear Overhang. If that's on a 31-ft coach, fine. The wheelbase is long enough to balance the Rear Queen Overhang. But putting that overhang on a 27-ft coach makes for too much overhang and poor weight distribution between the Front and Rear Axles.
Our WB is 218" on about a 32-ft coach, and it takes the Front Axle right to its 4600-lb load rating. But it allows the Rear Axle to stay below its 9450-lb rating, and the coach is relatively stable on the highway.
Look at a C from the side. If the "House" (NOT counting the cabover portion) looks like it's balanced on the Rear Axle, I predict Overloaded Rear Axle, Underloaded Front Axle, Poor Handling. Sad thing is, coach builders who should know better, recognize a need for a floorplan change, and get enough wheelbase, DON'T. They let the designer rule the engineer.
Our WB is 218" on about a 32-ft coach, and it takes the Front Axle right to its 4600-lb load rating. But it allows the Rear Axle to stay below its 9450-lb rating, and the coach is relatively stable on the highway.
Look at a C from the side. If the "House" (NOT counting the cabover portion) looks like it's balanced on the Rear Axle, I predict Overloaded Rear Axle, Underloaded Front Axle, Poor Handling. Sad thing is, coach builders who should know better, recognize a need for a floorplan change, and get enough wheelbase, DON'T. They let the designer rule the engineer.
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