Frame Stiffing to reduce Porpoising?

HMS Beagle wrote:

mbloof wrote:

TxGearhead wrote:

OP: are you sure you're not just seeing the camper rock back and forth, the spring loaded Fastguns doing their job?

I always get a kick out of these sorts of comments. :)

So a flat hard object sitting flat on another flat hard object is "rocking"??!?!??! hahahahahahahaha
.

Clearly you have little knowledge of material science. "Hard" and "flat" are relative terms. Steel is quite flexible, fiberglass very flexible, and any rubber map between them extremely flexible. Neither the bottom of the camper, nor the bed are flat, nor do they stay flat running down the road.

Granted nothing is hard/flat like a rock or chunk of concrete and almost everything has 'flex'.

The $64 question is how much? So flat camper sitting on flat bed on top of flat side of frame rails.

Is the camper compressing/expanding? Not likely.
Is the bed compressing/expanding? Again no. However given the support is in the center of it surely if enough force were applied to ether far side or single corner it might 'twist' or 'rock' side to side.
Is the camper 'rocking in the bed'? Again no. (unless it is on a thick soft rubber mat (horse stall mat comes to mind here)
Is the bed moving around on the mounts to the frame? Maybe, many have rubber mounts (to account for frame flex/twisting, see the side2side above).

Is the frame flexing/twisting? Sure, they are known to do that.

IMHO: Given the pivot point is the center of the frame and the camper nose is ~6-8' forward of that what the OP is seeing is minor frame flex amplified by the distance between pivot point and tip.



- Mark0.